T300/648复合材料迭层板接头挤压疲劳累积损伤问题的实验研究

本篇论文根据“剩余强度,剩余刚度”理论,讨论了碳纤维增强复合材料迭层板承载孔的挤压疲劳损伤,应用孔的永久变形描述损伤的产生和扩展,提出了“损伤函数”的定义和测定方法,并提出了新的“疲劳损伤点”的概念。实验还研究了温度对连接孔静挤压强度和疲劳寿命的影响。实验结果表明,温度的影响尤为重要。对损伤失效试件,采用“揭层方法”、“X射线”及“SEM方法”进行检测和损伤机理的研究。

EXPERIMENTAL STUDY ON CUMULATIVE DAMAGE OF T300/648 LAMINATES BUILT JOINTS

This paper debatad the damage of the "baring fatigue" in CFRP laminates arouud a loaded hole.according to the theory of the "residual stif fness".It described the damage initiation and propagation by the permanent deformation of a circular hole. This paper gave the definition and measuring method for "damge parameter" and the new notion of the "fatigue damage point".The testing program also was performed to study the effect of temperature and the fatigue life.The damaged specimens were detected and analysed by using "deply technique",X-ray radiographs" and "scanning electron microscopy" to study the damage mechanisms.