Microscale finite element model of brittle multifilament yarn failure behavior
Microscale finite element model of brittle multifilament yarn failure behavior
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DOI：
10.1177/1528083716674908
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发表时间：
2018
影响因子：
3.2
通讯作者：
O. Döbrich;T. Gereke;M. Hengstermann;C. Cherif
中科院分区：
文献类型：
--
作者：
O. Döbrich;T. Gereke;M. Hengstermann;C. Cherif
基于有限元方法建立了由工业碳纤维制成的复丝增强纱线的微观模型。该模型用于执行拉伸破坏的模拟。使用具有强度统计分布的最大应力准则对干复丝碳纱的失效行为进行建模。最大应力分配给每个单元，并根据单丝实验测试中发现的正态分布而变化。威布尔分布用于计算局部破坏应力。材料参数根据单元尺寸的函数进行计算，以考虑特定体积的统计断裂效应。拉伸破坏行为的代表性模拟证明了所引入的假设的概念。
A microscale model of multifilament reinforcement yarns made of technical carbon fibers is established based on the finite element method. The model is used to perform simulations of tensile failure. The failure behavior of dry multifilament carbon yarns is modeled using a maximum stress criterion with statistical distribution of the strength. The maximum stress is assigned to every single element and varied according to a normal distribution found in experimental tests of single filaments. The Weibull distribution is used for calculating the local failure stress. The material parameters are calculated in function of the element size to account for the volume-specific statistical breaking effect. Representative simulations of the tensile failure behavior prove the concept of the introduced assumptions.