摘要
为了考察一种小试件 CAI试验方法的有效性 ,本文作者对复合材料层合板的准静态横向压缩特性和损伤 ,以及损伤后的压缩破坏进行了试验研究 ,采用 C扫描、热揭层等技术对层合板内的损伤进行测量 ,并将含准静态横压损伤层合板的剩余压缩强度与低速冲击后板的压缩强度进行了比较。结果表明 :在横压过程中存在分层损伤起始门槛压缩载荷值或压入深度值 ,以及横压载荷极限值 ;小板试件各界面的分层面积沿厚度方向的分布和继后的压缩破坏形式等与 SACMA的
An experimental investigation was performed on the characteristics and damage of composite laminates with quasi-static indenting. The compressive behavior of laminates after quasi-static indentation was studied also in order to examine the validity of one CAI test method with the minimized specimen. Methods of ultrasonic C-scan, were used to measure the damages of the laminates. The CAI strengths of laminates with the quasi-static indentation damage were compared with that of laminates after low velocity impact. The results showed that there were ultimate load and a threshold load or a threshold indentation depth below which no damage occurred while laminates were indented. The distribution of delamination areas along laminate thickness of the CAI test method with the minimized specimen was different from that of SACMA CAI test method. The compressive failure modes of these two methods were different.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2002年第5期108-113,共6页
Acta Materiae Compositae Sinica
