摘要
采用单纤维碎断法 (Fragmentation)及声发射技术研究了富 Si O2 处理的 Si C纤维增强铝基复合材料经一定疲劳载荷后的界面接合强度。发现疲劳与未疲劳状态对实验机刚度的测量影响极大 ,这将直接影响纤维断裂强度的计算。采用直接溶出法测量经热压处理的纤维断裂强度 ,发现复合工艺对纤维的强度没有损耗 ,这与 Clough关系的预测有巨大的差异。经一定周次疲劳后 ,纤维的临界长度增加 。
The interfacial shear strength of SiC fiber reinforced aluminum composite treated with SiC 2 was studied by the method of fragmentation and acoustic emission after a certain cycle fatigue loading. The result shows that the pretreatment with fatigue and without fatigue displays a great influence on the stiffness of the test machine which will affect the calculations of fiber strength in composite. The measurement of fiber strength of hot pressed specimens by a dissolving method indicates that the fiber strength does not lose via composite process. The critical length of fiber increases a little after certain cycles of fatigue loading and thus, interfacial shear strength decreases.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2001年第4期42-45,共4页
Acta Materiae Compositae Sinica
基金
自然科学重点基金 :铝基层状复合材料界面性能评定及其与疲劳的关系 ( No:5 97310 2 0 )子项目内容之一
