航空科学技术2025，Vol.36Issue(5)：35-43,9.DOI:10.19452/j.issn1007-5453.2025.05.004
加载模式与历史对复合材料层间断裂的影响
Influences of Loading Mode and History on Interlaminar Fracture of Composite Materials
摘要
Abstract
Interlaminar fracture toughness,as a crucial indicator for evaluating a material's resistance to delamination propagation,plays a vital role in the design and analysis of composite aircraft structures.However,experimental studies have shown that fracture toughness is influenced by the loading mode and loading history,rather than an inherent material property.This paper extends the recently proposed finite crack growth energy release rate to consider the anisotropic plasticity of composite materials.The interlaminar fracture behaviors under Mode Ⅰ and Mode Ⅱ loading conditions are investigated experimentally and numerically.This paper finds that the crack growth behavior under Mode Ⅱ loading(end-notched flexure,ENF)can be well predicted by using a single critical finite crack growth energy release rate calibrated by the Mode I(double contilever beam,DCB)test.This means that it is sufficient to conduct a DCB test to forecast the experimental results of the same material under ENF conditions.Additionally,the critical energy release rate provides a quantitative explanation for the significant differences in classical Mode Ⅰ and Mode Ⅱ fracture toughness and the occurrence of hysteresis loops with peak load reduction during Mode Ⅱ cyclic loading and unloading processes.关键词
层间断裂/加载模式/有限裂纹扩展能量释放率/裂纹扩展预测/加载历史Key words
interlaminar fracture/loading mode/finite crack growth energy release rate/crack growth prediction/loading history引用本文复制引用
吴孟轩,徐武..加载模式与历史对复合材料层间断裂的影响[J].航空科学技术,2025,36(5):35-43,9.基金项目
国家自然科学基金(12172217) （12172217）
航空科学基金(20170957002) National Natural Science Foundation of China(12172217) （20170957002）
Aeronautical Science Foundation of China(20170957002) （20170957002）
