Abstract
The use of natural composites in modern engineering applications has numerous benefits owing to their excellent sustainable attributes and negligible environmental impacts. The full commercialization of natural composites as alternative materials to conventional ones is undermined by environmental factors such as moisture content leading to varied shrinkage and swelling behaviors. Uncontrolled shrinkage behavior can often lead to premature split in natural composites. The aim of this study is to investigate the fracture mechanisms due to directional shrinkage in natural composite material through numerical simulation by considering the finite element modelling software of LS-DYNA. From numerical results, directional shrinkage could be seen to clearly affect the fracture patterns in natural composites as compared to the control one. The fracture patterns, which indicated a narrowed region of stress concentration in the material, is assumed to emanate from internally induced forces in the material, namely tensile and compressive forces. This specific pattern is associated to longitudinal split failure typically observed in orthotropic materials. Results of this study can be useful to further investigate the complex fracture behavior in natural composite materials to better understand their durability limitations.
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