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首页> 外文期刊>Engineering Fracture Mechanics >Modeling the fiber bridging effect in cracked wood and paperboard using a cohesive zone model
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Modeling the fiber bridging effect in cracked wood and paperboard using a cohesive zone model

机译：使用凝聚区模型建模裂纹木材和纸板的纤维桥接效果

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摘要

Wood and paperboard are two of the most widely used structural and packaging materials. Their fracture mechanical properties play a critical role in their performance for the practical applications. Cracks may lead to the creation of bridging fibers across the crack surfaces in both materials, which complicates fracture measurements and modeling. The aim of this study is to predict the fracture behavior including the fiber bridging contribution by using a potential based cohesive law in a phenomenological way. The cohesive energy potential was constructed using an exponential function, and the cohesive traction-separation relationships were obtained from the gradient of the potential. The model was applicable to various traction increasing responses, i.e. convex and concave. The proposed model was evaluated by simulating the double cantilever beam (DCB), end-notched flexure (ENF), and mixed mode tests. The results agree well with experimental data.
机译：木材和纸板是两个最广泛使用的结构和包装材料中的两个。 它们的骨折机械性能在实际应用的性能中起着关键作用。 裂缝可能导致在两种材料中横跨裂缝表面的桥接纤维产生，这使得断裂测量和造型复杂化。 本研究的目的是预测通过以现象学方式使用基于潜在的粘性律法，包括纤维桥接贡献的裂缝行为。 使用指数函数构建粘性能量电位，并且从电位的梯度获得内聚牵引分离关系。 该模型适用于各种牵引响应，即凸凹。 通过模拟双悬臂梁（DCB），端口弯曲弯曲（ENF）和混合模式测试来评估所提出的模型。 结果与实验数据很好。

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