摘要
横向基体开裂和分层损伤是正交层板复合材料的主要损伤类型 .但在前人提出的完全抛物线剪切滞后分析模型中 ,均未考虑横向裂尖引起分层损伤的情况 .本文研究考虑了该情况并提出了包括横向裂尖引起分层损伤的抛物线模型 .并依此模型对材料刚度衰减进行了计算 ,并与不包含分层损伤的完全抛物线模型及不完全的线模型进行了比较 .结果表明 ,在应力较高情况下 ,本文提出的分析模型所得的预测结果与实验值符合得最好 .
Transverse cracking and delamination damage are often occur in cross ply composite laminates.Previous work′s about the complete parabolic shcar lag analysis,however,did not contain the delamination from the tip of transverse cracks. A complete parabolic shear lag analysis containing delamination damage induced by transverse cracks was therefore proposed and applied to predict the stiffness reduction by transverse cracking of materials.The relation of stress and transverse cracks density was also studied.Predictions of the incomplete parabolic shear lag analysis model,the complete parabolic shear lag analysis model and also the analysis model proposed in this paper have been compared.Results have shown that values obtained by our analysis model are the best conformable ones with the experimental values.
出处
《内蒙古工业大学学报（自然科学版）》
2001年第2期121-126,共6页
Journal of Inner Mongolia University of Technology：Natural Science Edition
关键词
层板复合材料
分层损伤
完全抛物线模型
刚度衰减
微损伤
composite laminate
delamination damage
the complete parabolic model
stiffness reduction
