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Numerical analysis of strain rate effect on ballistic impact response of multilayer three dimensional angle-interlock woven fabric Int. J. Damage Mech. (IF 3.125) Pub Date : 2021-01-20 Qingsong Wei; Dan Yang; Bohong Gu; Baozhong Sun
This paper investigates the ballistic impact on Kevlar multilayer three-dimensional angle-interlock woven fabric (3DAWF) by proposing the mesoscale geometrical model for the numerical simulation. Multilayer 3DAWF is designed to yarn level configuration by utilizing the membrane elements to reduce computational time and enhance accuracy. The general-purpose finite element code LS-DYNA is employed to
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Effect of the shape of the softening damage law on the predicted tensile fracturing and energy dissipation in textile composites Int. J. Damage Mech. (IF 3.125) Pub Date : 2021-01-18 Jing Xue; Kedar Kirane
The fracturing behavior of fiber-reinforced composites is often modeled using continuum damage mechanics-based approaches which commonly assume a linear softening damage law, i.e. a linearly decreasing stress with increasing strain. The objective of this paper is to assess the suitability of this assumption for composites and to systematically analyze the effect of the assumed shape of the softening
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An online monitoring method for creep-fatigue life consumption with real-time damage accumulation Int. J. Damage Mech. (IF 3.125) Pub Date : 2021-01-17 Hui Hong; Zhenwei Cai; Weizhe Wang; Yingzheng Liu
Online damage evaluation based on monitored complex cyclic loadings has become an important technique for reliability assessment, especially in high-temperature environments where creep occurs in addition to fatigue. Accuracy and rapidity of calculation are basic requirements for online damage evaluation methods. However, current creep damage evaluation methods seldom consider the fluctuation in stress
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Time-dependent behavior of rock-like specimen containing multiple discontinuous joints under uniaxial step-loading compression Int. J. Damage Mech. (IF 3.125) Pub Date : 2021-01-17 Wendong Yang; Chunjie Bo; Xuguang Chen; Chenchen Huang; Guizhi Li
Rock with multiple discontinuous joints widely exists in rock engineering, and its mechanical properties are complex, which greatly increases the difficulty of engineering design and construction. Time-dependent deformation characteristics and long-term strength evaluation of jointed rock masses remain poorly understood. In this work, the creep experiments of rock-like specimens with multiple discontinuous
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Finite element modelling of plain and reinforced concrete specimens with the Kotsovos and Pavlovic material model, smeared crack approach and fine meshes Int. J. Damage Mech. (IF 3.125) Pub Date : 2021-01-17 George Markou; Wynand Roeloffze
Modelling of concrete through 3 D constitutive material models is a challenging subject due to the numerous nonlinearities that occur during the monotonic and cyclic analysis of reinforced concrete structures. Additionally, the ultimate limit state modelling of plain concrete can lead to numerical instabilities given the lack of steel rebars that usually provide with the required tensile strength inducing
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Dynamic fatigue reliability analysis of turbine blades under combined high and low cycle loadings Int. J. Damage Mech. (IF 3.125) Pub Date : 2021-01-17 Peng Yue; Juan Ma; Changhu Zhou; Jean W Zu; Baoquan Shi
Establishment of damage accumulation models for reflecting the combined damage mechanism on the fatigue behavior of aero-engine turbine blades is crucial for their safety. In this work, a novel combined high and low cycle fatigue (CCF) life prediction methodology is presented as a basis of that to consider the interaction between low and high cycle fatigues. Accordingly, a dynamic reliability model
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Mechanical properties and damage constitutive model for uniaxial compression of salt rock at different loading rates Int. J. Damage Mech. (IF 3.125) Pub Date : 2021-01-14 Junbao Wang; Qiang Zhang; Zhanping Song; Yuwei Zhang; Xinrong Liu
To study the effect of loading rate on the mechanical properties of salt rock, uniaxial compression tests and acoustic emission tests at different loading rates were carried out on salt rock specimens. The test results show that with increases in loading rate, the peak stress of salt rock increases first and then essentially remains unchanged, and the elastic modulus increases gradually, while the
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Numerical modelling of the crack-pore interaction and damage evolution behaviour of rocklike materials with pre-existing cracks and pores Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-12-29 PLP Wasantha; D Bing; SQ Yang; T Xu
The combined effect of pre-existing cracks and pores on the damage evolution behaviour and mechanical properties of rocklike materials under uniaxial compression was numerically studied. Simulations of cracks and pores alone showed that increasing crack length and pore diameter decrease uniaxial compressive strength (UCS) and elastic modulus. Subsequent simulations considered two types of combinations
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Investigating the stress level impact on the creep rupture behaviour of 2195-T84 Al-Li alloy: Experimental and constitutive modelling Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-12-08 He Li; Lihua Zhan; Minghui Huang; Chunhui Liu; Xing Zhao; Chang Zhou; Fei Chen
In the present study, the creep rupture behaviour and microstructural evolution of 2195-T84 Al-Li alloy are investigated at different tensile stresses. It is found that as the applied stress during the creep rupture process increases, the corresponding creep strain and creep rate significantly increase. Moreover, the evolution of microstructures, including precipitates, dislocation density and creep
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Expansive soil-biochar-root-water-bacteria interaction: Investigation on crack development, water management and plant growth in green infrastructure Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-12-01 Hao Wang; Kexin Zhang; Lin Gan; Jiaqin Liu; Guoxiong Mei
The objectives of the study are to explore fundamental mechanism of expansive soil-biochar-root-water-bacteria interaction, and investigate crack development and hydraulic properties of biochar amended soils aiming at green infrastructures. The physical, chemical and biological effects of biochar on expansive soil have been comprehensively explored. Crack development is investigated quantificationally
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Nonlinear soil deformability effects on the seismic damage mechanisms of brick and stone masonry arch bridges Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-11-29 Alemdar Bayraktar; Emin Hökelekli
Masonry arch bridges, which were generally built using brick and stone materials, still form a significant part of the highway and railway networks in the World. The subsoil deformability may considerably affect seismic damage mechanics of masonry arch bridges. The paper investigates the effects of nonlinear foundation soil behavior on the seismic damage mechanisms of brick and stone semicircular masonry
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Damage evolution characteristics of saw-tooth joint under shear creep condition Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-11-25 Xing Zhang; Hang Lin; Yixian Wang; Rui Yong; Yanlin Zhao; Shigui Du
The creep characteristics of joint have an important influence on the long-term stability of rock mass engineering such as tunnels and slopes. In this paper, the sawtooth angle α is taken as the variable, five different numerical models of regular sawtooth joints are established using the discrete element numerical method, to study the shear mechanical characteristics of joints under creep condition
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Continuum damage-healing framework for the hydration induced self-healing of the cementitious composite Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-11-01 Qing Chen; Xiangyong Liu; Hehua Zhu; J Woody Ju; Xie Yongjian; Zhengwu Jiang; Zhiguo Yan
The self-healing materials have become more and more popular due to their active capacity of repairing the (micro-) damages, such as the (micro-) cracks, the (micro-) voids and the other defects. In this paper, the thermodynamic based damage-healing framework is presented for the hydration induced self-healing composite with a compatible healing variable. The new variable is incorporated to consider
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Impact of damage on the propagation of Rayleigh waves in lattice materials Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-10-14 H Reda; Y Rahali; B Vieille; H Lakiss; JF Ganghoffer
We analyze in this contribution the phase velocities of Rayleigh waves in periodic beam-lattices materials. The effective mechanical properties for the virgin and damaged structures are evaluated. The damaged lattice is modeled by removing beams within full networks made of repetitive unit cells. An evaluation of the phase velocities for the longitudinal and transverse versus the amount of damage is
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Local damage identification of high-strength circular concrete-filled steel tubes under low cycle fatigue Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-10-13 Yongtao Bai; Yanchao Yue; Yao Chen; Dong Luo; Yuhang Wang; Yi Zhang
This paper investigates the low cycle fatigue (LCF) induced damages of high-strength circular concrete-filled steel tubular (CFT) beam-columns subjected to nonstationary loading history. The test specimens are fabricated by ultra-thin walled steel tubes with 2 mm in thickness to clarify the vulnerability concerning fatigue failure, and to evaluate the fatigue life of slender and over-design circular
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An improved nonlinear cumulative damage model for strength degradation considering loading sequence Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-10-13 Changjie Jiang; Xintian Liu; Minghui Zhang; Xu Wang; Yansong Wang
In order to determine the effect of different loads on fatigue damage, a strength degradation model is proposed according to the law of residual strength degradation of metal materials. The model is verified with the strength degradation test data, and the results show that the model can describe the strength degradation process of general metal materials well. Combined with the strength degradation
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Characterizing the damage behavior of thin sheets for fuselage based on in situ corrosion fatigue test and digital image correlation technique Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-10-12 Yajun Chen; Xianjie Song; Chunming Ji; Fusheng Wang
The effect of salt spray and salt solution on the fatigue properties of 2024-T3 aluminum alloy plate used for aircraft fuselage structure have been investigated by combining Digital Image Correlation (DIC) technology with in-situ corrosion fatigue test. For this purpose, an in-situ corrosion fatigue platform was designed for gas and liquid phases. Fatigue experimental investigation was carried out
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A new ductile fracture criterion considering both shear and tension mechanisms on void coalescence Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-10-06 Xifeng Li; Wenbing Yang; Dongkai Xu; Ke Ju; Jun Chen
A new ductile fracture criterion is proposed based on three stages of ductile fracture: void nucleation, growth and coalescence from the microscopic viewpoint. Based on the observation of SEM fracture surfaces of AA2024-T351 aluminum alloy sheet and bar samples under different stress states, it is assumed that the void aggregation is controlled by shear or shear-tension fracture mechanism according
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Numerical model on predicting hydraulic fracture propagation in low-permeability sandstone Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-10-04 Ji Shi; Jianhua Zhang; Chunyang Zhang; Tingting Jiang; Gang Huang
Hydraulic fracture propagation is hard to predict due to natural joints and crustal stress. This process may lead to uncontrollable changes in hydrogeological conditions. Therefore, prediction and control of fracture propagation are paramount to permeability increase in ore-bearing reservoir. The coupled fluid-solid model was utilized to predict the hydraulic fracture propagation in low-permeability
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Model identification of durability degradation process of concrete material and structure based on Wiener process Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-09-30 Zhenhao Zhang; Minhan Liu; Xin Liu; Xiao Wang; Yi Zhang
The degradation and damage of concrete material and structure during their service life are significantly characterized by randomness, so it is of great importance to establish a stochastic process model for the structural durability degradation. This study was based on Wiener process to identify the durability degradation of concrete structures. Firstly, two identification methods for Wiener process
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Study on triaxial creep behavior and the damage constitutive model of red sandstone containing a single ice-filled flaw Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-09-30 Yao Bai; Renliang Shan; Tianyu Han; Haoyu Dou; Zhe Liu
The freezing method is widely used in the construction of vertical shafts in water-rich strata. The formed frozen rock wall is often involved in the creep process, and in particular, the creep behavior of frozen fissured rock mass poses a great threat to construction safety. To better understand the creep instability law of ice-filled, fractured red sandstone under freezing and triaxial stress conditions
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Fully integrated multi-scale modelling of damage and time-dependency in thermoplastic-based woven composites Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-09-23 F Praud; G Chatzigeorgiou; F Meraghni
In this work, a multi-scale model established from the concept of periodic homogenization is utilized to predict the cyclic and time-dependent response of thermoplastic-based woven composites. The macroscopic behaviour of the composite is determined from finite element simulations of the representative unit cell of the periodic microstructure, where the local non-linear constitutive laws of the components
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Detection and evaluation of barely visible impact damage in woven glass fabric reinforced polyamide 6.6/6 composite using ultrasonic imaging, X-ray tomography and optical profilometry Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-09-23 N Miqoi; P Pomarede; F Meraghni; NF Declercq; L Guillaumat; G Le Coz; S Delalande
The present experimental work investigates the response of woven glass fabric reinforced polyamide 6.6/6 subjected to drop weight impact loading. The main objective is the development and the introduction of a new experimental procedure/approach, based on different complementary detection techniques, that aims at investigating the damage induced by impact loading in thermoplastic woven fabric composites
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Retraction notice Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-09-22
RETRACTION NOTICE: Reliability analysis of mechanical components based on a nonlinear fatigue damage accumulation model
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Enhanced CDM model accounting of stress triaxiality and Lode angle for ductile damage prediction in metal forming Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-09-22 Kai Zhang; Houssem Badreddine; Naila Hfaiedh; Khemais Saanouni; Jianlin Liu
This paper deals with the prediction of ductile damage based on CDM approach fully coupled with advanced elastoplastic constitutive equations. This fully coupled damage model is developed based on the total energy equivalence assumption under the thermodynamics of irreversible processes framework with state variables. In this model, the damage evolution is enhanced by accounting for both stress triaxiality
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Excessive damage increase in dual phase steels under high strain rates and temperatures Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-09-22 Merve Çobanoğlu; Rasim K Ertan; Caner Şimşir; Mert Efe
Damage formation in dual phase steels is a complex process and it may be sensitive to the deformation conditions and mechanisms. In this study, the damage parameter is measured and compared under quasi-static and industrial forming conditions (temperatures: 25 vs 200, 300°C and strain rates: 10−3 vs 10 s−1) for DP590 and DP800 steels. Resonance frequency and ultrasonic sound velocity techniques are
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Research on damage evolution of deep formation rock based on acoustic emission test Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-09-13 Yong Tian; Rangang Yu; Yin Zhang; Xinbo Zhao
The study of rock damage evolution is of great significance in the field of underground engineering. In this paper, the damage development of deep formation rock was quantitatively evaluated by acoustic emission (AE) test. The Young’s modulus of the test rock specimens under ideal intact state was obtained by assuming a linear relationship between the AE rate parameter and the damage variation based
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The influence of different compositions of fiber metal laminates on the fracture in the semi-solidified stamping forming Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-09-09 Lei Li; Lihui Lang; Blala Hamza; Sergei Alexandrov; Shiyue Li
Fiber metal laminates (FMLs) are widely used in manufacturing due to the high specific strength, fatigue resistance, and lightweight. However, because of the deformation coordination of different layers of FMLs, challenges have been faced in rapid and small part forming. To research the feasibility of the fast forming of small parts using the FMLs, the influence of different compositions of FMLs on
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Feasibility of segmented concrete in wind turbine tower: Numerical studies on its mechanical performance Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-09-03 Yanchao Yue; Jingjing Tian; Qingyi Mu; Tangbing Chen; Lin Peng; Xi Lu; Jing Liu
Segmented concrete slices have been widely used in the construction of wind turbine tower due to easy transportation and cost savings. Factors such as the size and form of the concrete slice and the connector may affect the stiffness and reliability of the structure. The objective of this study is to investigate the influence of the above factors on mechanical performance of a wind turbine tower. A
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Lode angle dependency due to anisotropic damage Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-08-31 A Mattiello; R Desmorat
The lode angle dependency introduced by anisotropic damage evolution laws is analyzed in detail for initially isotropic materials. Many rupture criteria are obtained, under the proportional loading assumption, by the time integration of different anisotropic damage evolution laws D˙=⋯ among the three existing families: strain governed, stress governed and plastic strain governed. The cross-analysis
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Micromechanics-based damage model for liquid-assisted healing Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-08-25 Georg Siroky; Elke Kraker; Dietmar Kieslinger; Ernst Kozeschnik; Werner Ecker
This work presents a damage evolution framework including liquid-assisted healing. The model incorporates contributions from void size, void pressure, surface tension and liquid pressure. Experimental motivation for the damage-healing model is provided with in-situ melting experiments, where the evolution of the void distribution under monotonic tension is illustrated. The damage evolution is based
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Linking fatigue response of asphalt binders, mastics, and asphalt concrete mixture modified by nano-silica and synthesized polyurethane Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-08-25 Mana Motamedi; Gholamali Shafabakhsh; Mohammad Azadi
Asphalt concrete is composed of stone, sand, filler, and asphalt binder. Fatigue can be considered as a phenomenon affecting both the binder (asphalt binder or mastic) and the mixture. The purpose of this study was to investigate the fatigue damage response in asphalt binders, mastics, and asphalt concrete mixtures modified with nano-silica and synthesized polyurethane. The continuum damage mechanics
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Mechanical behavior of sandwich panels with hybrid face sheets and embedded super-elastic SMA wires under quasi-static loading: An experimental investigation Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-08-25 SA Masoudi Moghaddam; M Yarmohammd Tooski; M Jabbari; AR Khorshidvand
In this paper the experimental behavior of sandwich panels with hybrid composite face sheets and SMA wires under quasi-static loading test was investigated. The square-shaped sandwich panel was composed of a foam core and hybrid composite face sheets consisted of carbon-epoxy and glass-epoxy laminates, in which pre-strained super-elastic SMA wires were placed between the laminates. Sandwich panels
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Microstructural features effect on the evolution of cyclic damage for polycrystalline metals using a multiscale approach Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-08-23 Moussa Bouchedjra; Abdelwaheb Amrouche; Toufik Kanit; Mohamed El Amine Belouchrani
In the context of polycrystalline metals, the damage process analysis is generally restricted to surface of a sample containing some hundreds of grains, due to the inherent difficulties microstructural analysis. Determination of the grain size influence, misorientation and neighboring grains effect remains difficult with experimental studies. In this work, the influence of microstructural characteristics
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Field experimental investigation on filling the soda residue soil with liquid soda residue and liquid fly ash Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-08-19 Xiaoyu Bai; Jiaxiao Ma; Junwei Liu; Mingyi Zhang; Nan Yan; Yonghong Wang
In order to reuse waste soda residue, the feasibility of utilizing liquid soda residue and liquid fly ash to prepare soda residue soil was investigated. The mechanical properties of the soda residue soil were studied and analyzed through laboratory tests and field tests. The raw materials preparation process and liquid-liquid mixing method in the field were determined, and the optimal mixing proportion
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Micromechanically-motivated phase field approach to ductile fracture Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-08-16 Erfan Azinpour; Jose Cesar de Sa; Abel Dias dos Santos
Utilization of the phase-field diffusive crack approach in prediction of crack evolution in materials containing voids is investigated herein. It has been established that the ductile failure occurs predominantly due to nucleation, growth and coalescence of micro-voids and micro-cavities, which lead to initiation and propagation of cracks till final material collapse. This study is an attempt to model
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Comparison of two uncoupled ductile damage initiation models applied to DP900 steel sheet under various loading paths Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-07-28 Zhiyu Tuo; Zhenming Yue; Xincun Zhuang; Xinrui Min; Houssem Badreddine; Liangyu Qiu; Jun Gao
Accurate prediction of the fracture occurrence of high strength materials is always the hot spot in the research field of metal-forming process. Appropriate material model is the key issue which can accurately describe the mechanical forming behavior under different forming conditions. However, advanced fully coupled damage/behavior models are heavy to use by engineers and have a high cost in term
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Analytical model for determining effective stiffness and mechanical behavior of polymer matrix composite laminates using continuum damage mechanics Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-07-26 Sota Onodera; Tomonaga Okabe
The present paper proposes a new analytical model for predicting the effective stiffness of composite laminates with fiber breaks and transverse cracks. The model is based on continuum damage mechanics and the classical laminate theory. We derived damage variables describing stiffness reduction due to fiber breaks and its maximum value during ultimate tensile failure from the global load-sharing model
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A thermodynamics-based damage model for the non-linear mechanical behavior of SiC/SiC ceramic matrix composites in irradiation and thermal environments Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-07-21 Mohammad Alabdullah; Nasr M Ghoniem
A damage model is developed and validated with experimental data for the non-linear mechanical behavior of SiC/SiC composite materials in nuclear applications. Cyclic thermal and mechanical loading associated with neutron irradiation effects of these composites leads to wide-spread and progressive micro-cracking that leads to loss of thermal conductivity and further enhancement of thermo-mechanical
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Influence of varying nitrogen on creep deformation and damage behaviour of type 316L in the framework of continuum damage mechanics approach Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-07-14 J Christopher; C Praveen; V Ganesan; GV Prasad Reddy; Shaju K Albert
In the present study, Kachanov–Rabotnov continuum damage model has been employed to describe the steady state and tertiary creep deformation and damage behaviour of 316L austenitic stainless steel with different nitrogen contents of 0.07, 0.11 and 0.22 wt%, at 923 K. For all the nitrogen contents, the model appropriately predicts the creep strain–time data, creep rupture strain and rupture life. The
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Destructuration of saturated natural loess: From experiments to constitutive modeling Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-07-12 Yukai Fu; Zhiwei Gao; Yi Hong; Tonglu Li; Akhil Garg
It has been well recognized that unsaturated natural loess shows significant volume contraction upon wetting due to its metastable internal structure. But the structural effect on stress–strain relationship of saturated natural (undisturbed) loess is much less explored. Few attempts have been made in proposing a constitutive model for saturated natural loess. This study presents both laboratory tests
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Evaluation of surface energy for formation of multiple edge cracks using Medg-integral Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-06-12 JH Chang; LW Guo
A novel contour integral approach termed Medg is introduced for computation of the surface energy required for the formation of multiple edge cracks. The method is developed by reinterpretation of the conventional M-integral with deliberate delimitation of integration contour and selection of coordinate origin. Due to path independence, this method is efficient, easy to implement by using finite elements
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Numerical homogenisation based on asymptotic theory and model reduction for coupled elastic-viscoplastic damage Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-06-11 Mainak Bhattacharyya; David Dureisseix; Beatrice Faverjon
This article deals with damage computation of heterogeneous structures containing locally periodic micro-structures. Such heterogeneous structure is extremely expensive to simulate using classical finite element methods, as the level of discretisation required to capture the micro-structural effects is too fine. The simulation time becomes even higher when dealing with highly non-linear material behaviour
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A new damage-coupled cyclic plastic model for whole-life ratchetting of heat-treated U75V steel Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-06-09 Ziyi Wang; Xiang Xu; Li Ding; Guozheng Kang; Ping Wang; Qianhua Kan
In the framework of continuum damage mechanics, a new damage-coupled cyclic plastic model is proposed to describe the nonlinear evolution of whole-life ratchetting and its dependence on the stress level. The characteristic that the damage evolution rate of U75V heat-treated steel decays in the initial load cycles is considered by introducing a modified term into classic damage evolution equation. A
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Damage-coupled ratcheting behaviors of SA508 Gr.3 steel at room and elevated temperatures: Experiments and simulations Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-06-05 Jun Tian; Xiaolong Fu; Xuejiao Shao; Lu Jiang; Jian Li; Qianhua Kan
A series of experiments subjected to uniaxial and non-proportionally multiaxial cyclic loadings were performed to investigate the ratcheting responses of SA508 Gr.3 steel at room and elevated temperatures. The influences of different stress levels and nonproportional loading paths on the damage-coupled ratcheting responses were discussed. From experimental results, cyclic softening characteristic and
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Ballistic penetration damages and energy absorptions of stacked cross-plied composite fabrics and laminated panels Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-05-25 Qingsong Wei; Bohong Gu; Baozhong Sun
Flexible fabrics have been widely used in body armor designs. Here we report ballistic impact damage of stacked cross-plied composite fabric and cross-plied laminated panels. The ballistic impact behaviors of stacked cross-plied composite fabric and cross-plied laminated panel have been tested with fragment-simulating projectiles under the strike velocity 550–600 m/s to explore the influence of the
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Influence of biochar from animal and plant origin on the compressive strength characteristics of degraded landfill surface soils Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-05-16 Manash Jyoti Bora; Sanandam Bordoloi; Himanshu Kumar; Nirmali Gogoi; Hong-Hu Zhu; Ajit K Sarmah; P Sreeja; S Sreedeep; Guoxiong Mei
Growing awareness of sustainability in the landfill cover system has increased the use of biochar amendment for degraded landfill surface soils. Hydraulic and vegetative benefits of biochar on cover soil have been studied in the past, while ignoring mechanical characteristics, which is important to understand progressive failure of landfill infrastructure. In this study, the mechanical characteristics
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Stochastic micromechanics-based investigations for the damage healing of unsaturated concrete using electrochemical deposition method Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-05-16 Q Chen; HH Zhu; JW Ju; HX Li; ZW Jiang; ZG Yan
The (micro-) cracks or (micro-) voids will lead to the damage of concrete material. A stochastic micromechanical framework is proposed to investigate the damage healing of the unsaturated concrete with the electrochemical deposition method. Stochastic micromechanical representations are presented based on the material’s random microstructures. Differential scheme-based multilevel homogenization procedures
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An analytical model of multi-stress drops triggered by localized microcrack damage in brittle rocks during progressive failure Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-05-13 Xiaozhao Li; Xiaolei Qu; Chengzhi Qi; Zhushan Shao
Stress drops in stress–strain constitutive curves of intact brittle rocks under high confining pressure have great significance for evaluating the earthquake mechanism and the safety of deep underground engineering. Microcrack growth in intact rock strongly influences the stress drops. However, the theoretical model of microcrack growth-dependent multi-stress drops rarely is proposed in stress–strain
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A time-dependent tensile constitutive model for long-fiber-reinforced unidirectional ceramic-matrix minicomposites considering interface and fiber oxidation Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-05-12 Li Longbiao
In this paper, a time-dependent tensile constitutive model of long-fiber-reinforced unidirectional ceramic-matrix minicomposites is developed considering the interface and fiber oxidation. The relationship between the time-dependent tensile behavior and internal damage is established. The damage mechanisms of time-dependent matrix cracking, fiber/matrix interface debonding, fiber failure, and the oxidation
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Constitutive model of rock triaxial damage based on the rock strength statistics Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-05-11 Kai Chen
Firstly, an X-ray diffraction test is carried out to investigate brittle rock specimens’ composition, and a triaxial compression test is conducted to study the deformation behaviors and mechanical properties. Then, assuming that the rock material is able to be divided into the elastic part satisfying the Hooke’s law and the damage part where rock strength follows lognormal distribution, this paper
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A unified damage model for fibrous composite laminae subject to in-plane stress-state and having multi material-nonlinearity Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-04-26 GA Abu-Farsakh; AM Asfa
In the present study, a novel methodology of damage modeling is introduced to predict damage propagation in fibrous composite materials according to the plastic strain energy density induced in the lamina only. The importance of the new damage-model is the ability to assess damage-evolution in fibrous composite laminae irrespective of stress-state and fiber-orientation angle. An energy-based model
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Numerical investigation of micro-cracking behavior of brittle rock containing a pore-like flaw under uniaxial compression Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-03-29 Louis Ngai Yuen Wong; Jun Peng
Pore-like flaws, which are commonly encountered in brittle rock, play an important role in the engineering performance of structures constructed in or on rock. Experimental and numerical investigations of micro-cracking mechanism of rock containing a pore-like flaw can enhance our knowledge of rock damage/failure from a microscopic view. In this study, the influences of a two-dimensional circular pore-like
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A coupled elastoplastic anisotropic damage model for rock materials Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-03-12 Susheng Wang; Weiya Xu
In this study, a rigorous constitutive model within the framework of thermodynamics is formulated to describe the coupling process between irreversible deformation and anisotropic damage of rock materials. The coupling effect is reflected based on the “two-surface” formulation. The plastic response is described by a yield function while the anisotropic damage is defined by a novel exponential damage
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Compressive behaviors of ultra-low-weight foamed cement-based composite reinforced by polypropylene short fibers Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-03-08 Yuanyi Yang; Qi Zhou; Yi Deng; Jinhui Lin
With advantages in sustainability, low thermal conductivity, and self-weight, the foamed cement-based composites have captured tremendous attention in various low strength structural and nonstructural applications. This paper aimed to investigate the effects of the short polypropylene fibers on the quasi-static compression performance of the ultra-low-weight foamed cement-based composites. The results
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An improved nonlinear damage model of rocks considering initial damage and damage evolution Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-03-02 Wenlin Feng; Chunsheng Qiao; Shuangjian Niu; Zhao Yang; Tan Wang
The experimental results show that the creep properties of the rocks are affected by the initial damage, and the damage evolution also has a significant impact on the time-dependent properties of the rocks during the creep. However, the effects of the initial damage and the damage evolution are seldom considered in the current study of the rocks' creep models. In this paper, a new nonlinear creep damage
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Damage and healing mechanics in plane stress, plane strain, and isotropic elasticity Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-02-18 George Z Voyiadjis; Chahmi Oucif; Peter I Kattan; Timon Rabczuk
The present paper presents a theoretical formulation of different self-healing variables. Healing variables based on the recovery in elastic modulus, shear modulus, Poisson's ratio, and bulk modulus are defined. The formulation is presented in both scalar and tensorial cases. A new healing variable based on elastic stiffness recovery in proposed, which is consistent with the continuum damage-healing
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Elastic–plastic-damage model of nano-indentation of the ion-irradiated 6061 aluminium alloy Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-02-13 A Ustrzycka; B Skoczeń; M Nowak; Ł Kurpaska; E Wyszkowska; J Jagielski
The paper presents experimental and numerical characterization of damage evolution for ion-irradiated materials subjected to plastic deformation during nano-indentation. Ion irradiation technique belongs to the methods where creation of radiation-induced defects is controlled with a high accuracy (including both, concentration and depth distribution control), and allows to obtain materials having a
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Elastic–plastic damage prediction in notched epoxy resin specimens under mixed mode I/II loading using two virtual linear elastic failure criteria Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-02-09 AS Rahimi; MR Ayatollahi; AR Torabi
Elastic–plastic damage of a ductile epoxy resin is investigated for the first time in the configuration of semicircular bend specimen weakened by U-shaped notches under mixed mode I/II loading conditions. U-notched specimens are prepared from the characterized epoxy material with different notch rotation angles and notch tip radii. Load-carrying capacities of the U-notched specimens are experimentally
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The effect of cross-section shape on deformation, damage and failure of rock-like materials under uniaxial compression from both a macro and micro viewpoint Int. J. Damage Mech. (IF 3.125) Pub Date : 2020-02-05 Chunyang Zhang; Hang Lin; Caimou Qiu; Tingting Jiang; Jianhua Zhang
The mechanical properties of rock-like materials always attract the interest of many researchers. In this paper, we study the influence of specimen cross-section shape on uniaxial compressive strength as well as their deformation, damage and failure characteristics by uniaxial compression tests. The diameter and height of circular cross-section specimens are 50 and 100 mm, respectively, and the height