当前位置: X-MOL 学术J. Mech. Behav. Biomed. Mater. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Mechanistic understanding of compression-compression fatigue behavior of functionally graded Ti-6Al-4V mesh structure fabricated by electron beam melting.
Journal of the Mechanical Behavior of Biomedical Materials ( IF 3.9 ) Pub Date : 2019-12-16 , DOI: 10.1016/j.jmbbm.2019.103590
Q S Wang 1 , S J Li 2 , W T Hou 2 , S G Wang 2 , Y L Hao 2 , R Yang 2 , R D K Misra 3
Affiliation  

In recent years, mesh structures have attracted significant interest for structural and functional applications. However, the mechanical strength and energy absorption ability of uniform mesh structured materials degrade with density. To address this challenge, we propose the concept of functionally graded mesh structures. The objective of the proposed research is to fundamentally understand the compressive behavior of graded mesh structures. The compression-compression fatigue behavior of functionally graded Ti–6Al–4V mesh structure under identical bulk stress condition is studied here. During cyclic deformation, it was observed that the local stress distribution in the struts was not uniform because of inhomogeneous mechanical properties of the constituents. Fatigue cracks first initiated in the lowest strength constituent, and then propagated until structural failure occurred. However, no obvious damage was observed in other constituents during the entire process. In contrast with iso-strain state, the fatigue life of graded structure is mainly determined by the constituent with the lowest strength.



中文翻译:

通过电子束熔化制备的功能梯度Ti-6Al-4V网状结构的压缩-压缩疲劳行为的力学理解。

近年来,网状结构引起了人们对于结构和功能应用的极大兴趣。但是,均匀的网状结构材料的机械强度和能量吸收能力随密度降低。为了解决这一挑战,我们提出了功能渐变网格结构的概念。拟议研究的目的是从根本上了解渐变网格结构的压缩行为。本文研究了功能梯度Ti–6Al–4V网状结构在相同整体应力条件下的压缩-压缩疲劳行为。在循环变形期间,由于部件的机械性能不均匀,观察到支柱中的局部应力分布不均匀。疲劳裂纹首先在强度最低的成分中产生,然后传播直到发生结构破坏。但是,在整个过程中,未观察到其他成分的明显损坏。与等应变状态相反,梯度结构的疲劳寿命主要由强度最低的成分决定。

更新日期:2019-12-16
down
wechat
bug