摘要
聚酰亚胺基复合材料由于其自身反应复杂,成型难度较大,带拐角的聚酰亚胺基复合材料构件,其拐角区域(以下称为R区或R角)更容易产生分层、架桥等缺陷,本研究从拐角处的应力及固化过程中的模具、零件热膨胀差异等方面着手,探讨了拐角处的分层缺陷的成因及机理,并通过试验进行验证。发现,铺层结构、模具形式、热匹配等因素对拐角处分层缺陷影响较大。
Polyimide-based composites due to its own reaction complex and molding difficulty, its R region is easy to produce delamination, bridging, and other defects. The present study focuses on the aspects of stress inside the R area, curing process in the mold and thermal expansion differences to explore the causes and mechanism of the defects of the R corner area. All of the above are validated by experiments. It is found that the overlay struc- ture, mold forms, thermal matching are the main causes of delamination defects in R area ofpolyimide-based compos- itc parts.
出处
《航空制造技术》
北大核心
2013年第7期67-69,共3页
Aeronautical Manufacturing Technology
关键词
聚酰亚胺基复合材料
分层缺陷
热膨胀匹配
Polyimide-based composites Delami- nation defeci Thermal matching
