Failure mechanisms of biological crossed-lamellar microstructures applied to synthetic high-performance fibre-reinforced composites
Failure mechanisms of biological crossed-lamellar microstructures applied to synthetic high-performance fibre-reinforced composites
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DOI：
10.1016/j.jmps.2018.12.008
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发表时间：
2019-04
影响因子：
5.3
通讯作者：
R. Häsä;S. Pinho
中科院分区：
文献类型：
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作者：
R. Häsä;S. Pinho
本文研究了生物交叉层状微结构的增韧机制是否可以在合成的高性能碳纤维/环氧树脂基复合材料中重现。采用有限元方法研究了人工合成交叉层状组织的破坏过程。这使得设计具有这种微结构的高性能碳纤维增强聚合物（CFRP）成为可能。两种不同的程序，然后开发合成的第一个交叉层状结构的CFRP在文献中。随后制造了测试样本。在SEM环境中进行了三点弯曲试验，显示了在稳定条件下微结构的损伤扩散能力。结果表明，交叉片层微观结构可以合成在CFRP具有良好的精度，并与自然交叉片层微观结构的机械增韧机制可以在这种合成材料中再现。
This paper investigates whether the toughening mechanisms of a biological crossed-lamellar microstructure can be reproduced in a synthetic high-performance carbon fibre/epoxy matrix composite. The mechanics of the failure process in synthetic crossed-lamellar microstructures was investigated using the Finite Element Method. This enabled the design of a high-performance carbon-fibre reinforced polymer (CFRP) with such microstructure. Two different procedures were then developed to synthesise the first crossed-lamellar microstructures in CFRP in the literature. Test specimens were subsequently manufactured. Three-point bend tests were carried out in an SEM environment, showcasing the damage diffusion capability of the microstructure under stable conditions. The results show that the crossed-lamellar microstructure can be synthesised in CFRP with good accuracy, and that the mechanical toughening mechanisms associated with the natural crossed-lamellar microstructures can be reproduced in this synthetic material.