玻璃钢/复合材料Issue(2)：58-65,8.
升温速率对复合材料修补片固化过程热应力的影响
EFFECTS OF HEATING RATE ON THE THERMAL STRESS OF COMPOSITE PATCHES DURING CURING PROCESS
摘要
Abstract
The heat-blanket thermal curing process of thermosetting resin matrix composite patch was simulated using the finite element method.The distribution and variation characteristics of temperature and thermal stress of the composite patch for different heating rates were analyzed,and the effects of heating rates on the residual thermal stress in the patch at different time points were studied.The results show that the thermal stress is mainly concentrated on the central region of the patch top surface and in its contact area with the mother plate during the heating stage,and the thermal stress in the internal area is higher than that at the patch top surface during the isothermal and cooling stage.The results also show that the faster the heating rate is,the faster the curing is.But,the greater the peak thermal stress is during the heating phase.And the value and distribution of thermal stress of the patch are independent of the heating rate during the isothermal and cooling stage.The results also indicate that the maximum value of the thermal stress appears at the end of the heating stage for the lower heating rate,while the maximum thermal stress appears near the end of the heating stage for higher heating rates.The research results provide the good numerical basis for selection of the heating rate to reduce the internal thermal stress and to control the delamination of the patch in the heating stage.关键词
树脂基复合材/修补片/升温速率/热补仪/固化历程/热应力Key words
resin matrix composite/patch/heating rate/heat-blanket/curing process/thermal stress分类
通用工业技术引用本文复制引用
李世林,陈淑仙,田秋实,梁振宇..升温速率对复合材料修补片固化过程热应力的影响[J].玻璃钢/复合材料,2018,(2):58-65,8.基金项目
国家自然科学基金民航联合基金重点项目(U1233202,U1333201) （U1233202,U1333201）
国家自然科学基金项目(51306201) （51306201）
