摘要
以聚碳酸酯(PC)为主要研究对象,通过试验手段以及图像处理的分析方法,对这类非晶态高聚物的裂尖应力场进行了观察和分析,并建立了PC材质的银纹损伤区分析模型。研究结果表明:PC等非晶态高聚物在拉伸变形过程中需同时考虑材料的黏弹性和屈服性等作用;相对最大应力出现在裂尖区根部x轴方向,角度为0°;在实际应用中,PC材料在裂尖银纹区的黏弹性会使银纹进一步扩展,应力分布随时间变化而异,从而使银纹进一步生长直至断裂。
With polycarbonate （PC） as main research object, the crack tip stress field of amorphous polymer was observed and analyzed by testing method and image processing analysis method, and the analysis model of crazing damage area of PC material was established. The research results showed that the viscoelasticity and yield function of PC or amorphous polymer need to be meanwhile considered in the process of tensile deformation. The relatively maximal stress present to x axis direction of crack tip area roots with 0° angle. In practical application, the viscoelasticity from crack tip crazing area of PC material could further extend crazing, and the stress distribution was different with changing time, so that the crazing could further growth until rupture.
出处
《中国胶粘剂》
CAS
北大核心
2015年第12期22-26,30,共6页
China Adhesives
基金
江西省高等学校教学改革研究课题(JXJG-12-78-1)
江西农业大学南昌商学院科研扶助基金项目(NCSXY-J1204)
关键词
聚碳酸酯
裂尖应力场
图像处理
银纹
polycarbonate （PC）
crack tip stress field
image processing
crazing
