Abstract

This work investigates the crashworthiness of jute fiber mat reinforced epoxy composite circular tubes by introducing holes around the tube circumference. The composite tubes were tested under quasi-static compressive mode. Based on Taguchi’s method considering L27 orthogonal array, the optimization of design variables was carried out by selecting three design variables with three levels such as lengths (70, 140 and 210 mm), hole diameter (6, 8 and 10 mm) and number of drill holes (2, 4 and 6) with changing their position. From experiments, the crashworthiness indicators like maximum stress, absorbed energy and specific absorbed energy were calculated. By introducing the holes on tubes, the crashworthiness was varied, and in optimization, the Analysis of Variance showed the interaction effect of design variables. The signal-to-noise results showed the maximum effect of variables on crashworthiness. The developed regression model results were compared with experimental results. The mechanism of failure of all samples was examined from photography.

摘要

这项工作通过在管圆周周围引入孔来研究黄麻纤维垫增强环氧树脂复合圆管的耐撞性。复合管在准静态压缩模式下进行测试。基于考虑L27正交阵列的田口方法，通过选择长度（70、140和210 mm）、孔径（6、8和10 mm）和孔数三个层次的三个设计变量进行设计变量的优化。钻孔（2、4 和 6）并改变它们的位置。通过实验，计算了最大应力、吸收能量和比吸收能量等耐撞性指标。通过在管子上引入孔来改变耐撞性，在优化中，方差分析显示了设计变量的交互作用。信噪比结果显示了变量对耐撞性的最大影响。将建立的回归模型结果与实验结果进行了比较。通过摄影检查所有样品的失效机制。