确定纤维增强复合材料断裂韧性的能量法

An Energy Method for Determination of Fracture Toughness of Fibrous Composite Laminates

应用线弹性断裂力学的弹性能释放率及裂纹扩展阻力等基本概念和理论,建立起确定纤维增强高分子聚合物复合材料断裂韧性的能量方法。对以PEEK塑料和环氧树脂为基的石墨纤维增强复合材料的试验计算结果与应力法确定的材料的断裂韧性值符合得较好。

An energy method for determining fracture toughness of fibrous composite laminates was based on the theory of elastic energy release rate and crack-growth resistance in this paper. The fracture toughness values determined with energy method were close to ones with stress method for the graphite/PEEK and Epoxy Laminates.