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A phase-field model for strength and fracture analyses of fiber-reinforced composites
Composites Science and Technology ( IF 9.1 ) Pub Date : 2019-04-01 , DOI: 10.1016/j.compscitech.2018.10.031
J.J. Espadas-Escalante , N.P. van Dijk , P. Isaksson

Abstract A phase-field model for brittle fracture is proposed and evaluated for strength and fracture analyses of composites. In addition to the elastic properties, this approach makes use of only the fracture toughness and the strength of the material. The capability of the method is shown in analyses of composites at two scales. In laminates, strengths of notched laminates are estimated, including hole size effects. In a lamina, cracks developed in both transverse tension and compression are analyzed and compared to other numerical methods in the literature. The effects of a spectral and a hydrostatic-deviatoric decomposition of the strain energy density, two variants often used in phase-field formulations, are studied. It is shown that the choice of the decomposition affects the fracture development. Results are compared to experiments and simulations in the literature showing the capabilities of the phase-field approach.

中文翻译:

用于纤维增强复合材料强度和断裂分析的相场模型

摘要 提出了脆性断裂的相场模型,并评估了复合材料的强度和断裂分析。除了弹性特性之外,该方法仅利用材料的断裂韧性和强度。该方法的能力体现在两个尺度的复合材料分析中。在层压板中,估计缺口层压板的强度,包括孔尺寸效应。在薄层中,分析了横向拉伸和压缩中产生的裂纹,并与文献中的其他数值方法进行了比较。研究了应变能量密度的光谱和静水偏压分解的影响,这两种变体通常用于相场公式中。结果表明,分解方式的选择会影响裂缝的发育。
更新日期:2019-04-01
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