A failure criterion for fiber reinforced polymer composites under combined compression-torsion loading
A failure criterion for fiber reinforced polymer composites under combined compression-torsion loading
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DOI：
10.1016/s0020-7683(02)00649-2
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发表时间：
2003-03-01
影响因子：
3.6
通讯作者：
Waas, AM
中科院分区：
文献类型：
--
作者：
Yerramalli, CS;Waas, AM
本文提出了一种基于断裂力学的单向复合材料在复合载荷作用下的失效准则。从这个标准的预测已与实验数据进行了比较，从玻璃和碳纤维增强聚合物复合材料的50%的纤维体积分数的组合压缩-扭转载荷。在旋转控制和位移控制下以比例方式对样本施加载荷。的Budiansky-Fleck扭结模型，专门为一个坚实的圆柱体，和新的故障模型对实验数据的比较表明，Budiansky-Fleck模型预测不捕获的抗压强度的变化作为玻璃纤维复合材料的剪切应力的函数。这是因为这些复合材料主要通过压缩分裂而失效。Budiansky-Fleck模型预测适用于因压缩扭结而失效的复合材料。新的模型预测捕捉玻璃复合材料的实验结果，其中压缩强度最初不受剪切应力的影响，但当达到剪切应力的临界值时，压缩强度急剧降低。(C)2002爱思唯尔科技有限公司。保留所有权利。
A fracture mechanics based failure criterion for unidirectional composites under combined loading has been developed. The predictions from this criterion have been compared with experimental data obtained from combined compression-torsion loading of glass and carbon fiber reinforced polymer composites of 50% fiber volume fraction. The specimens were loaded under rotation control and displacement control in a proportional manner. Comparison of the Budiansky-Fleck kinking model, specialized to a solid circular cylinder, and the new failure model against experimental data suggests that the Budiansky-Fleck model predictions do not capture the variation of compressive strength as a function of shear stress for glass fiber composites. This is because these composites fail predominantly by compressive splitting. The Budiansky-Fleck model predictions are appropriate for composites that fail by compressive kinking. The new model predictions capture the experimental results for glass composites where the compression strength is initially unaffected by shear stress but undergoes a drastic reduction when a critical value of shear stress is reached. (C) 2002 Elsevier Science Ltd. All rights reserved.