Effects of hole machining defects on strength and fatigue life of composite laminates
- 作者：Persson ; Erik ; Eriksson ; Ingvar ; Zackrisson ; Leif
- 关键词：machining defects ; fatigue life ; polymer matrix composites (PMCs) ; radiography
- 刊名：Composites Part A ; Applied Science and Manufacturing (Incorporating Composites and Composites Manufacturing)
- 出版年：1997
- 期刊代码：17_1359835x
- 类别：ms
- 出版时间：1997
- 卷：28
- 期：2
- 页码：141-151
- 文件大小：774 K
摘要
The effects of hole machining defects on strength and fatigue life of carbon/epoxy laminates subjected to static and fatigue loading are presented. Dry specimens were subjected to pin loading and uniaxial compressive loading at room temperature. The KTH method, a new method which gives defect-free holes, was used to machine holes in the specimens. For comparison, holes were also machined using two traditional drilling techniques causing varying extents of damage. X-ray techniques were used to detect the hole machining defects. The permanent deflection of compressively loaded specimens was monitored during cyclic loading. Hole machining defects significantly reduced the static and fatigue strengths of pin-loaded laminates; the effects on the strengths of compressively loaded laminates were less pronounced.