CAJ | 학술논문

研究了退火处理后光学级聚碳酸酯（PC）的冲击断面形貌，重点分析了周期条纹和带状形貌的形成机理。经退火处理的PC冲击断面形貌主要由断裂源区、雾区和末端带状区组成。基于断面形貌分析，认为雾区内周期条纹的形成是应力波改变了银纹及其附近基体的应力场，从而导致裂纹路径发生改变的结果。周期条纹中银纹带和无特征区宽度的变化则是裂纹扩展时所在银纹层厚度减小的结果。末端带状区内带状形貌的形成机理是一个裂纹扩展的间歇过程，即“黏-滑”过程。
연구료퇴화처리후광학급취탄산지（PC）적충격단면형모，중점분석료주기조문화대상형모적형성궤리。경퇴화처리적PC충격단면형모주요유단렬원구、무구화말단대상구조성。기우단면형모분석，인위무구내주기조문적형성시응력파개변료은문급기부근기체적응력장，종이도치렬문로경발생개변적결과。주기조문중은문대화무특정구관도적변화칙시렬문확전시소재은문층후도감소적결과。말단대상구내대상형모적형성궤리시일개렬문확전적간헐과정，즉“점-활”과정。
The?authors?studied?the?morphology?of?impact?fracture?surface?of?annealed?optical-grade?poly-carbonate?(PC),?with?an?emphasis?on?the?formation?mechanism?of?cycle?stripes?and?band?morphology.?The?mor-phology?of?impact?fracture?surface?of?annealed?PC?could?be?divided?into?fracture?original?region,?mist?region?and?end-wall?band?region.?Based?on?the?analysis?of?the?fracture?surface?morphology,?it?is?considered?that?the?forma-tion?of?cycle?stripes?in?the?mist?region?is?the?result?that?the?stress?fields?of?the?craze?and?matrix?near?the?craze?are?changed?by?stress?waves,?leading?to?the?change?of?crack?paths.?The?decrease?of?the?thickness?of?the?craze?layer?during?crack?propagation?results?in?the?change?of?the?craze?band?and?the?nondescript?region's?width?in?cycle?stripes.?The?formation?mechanism?of?the?band?morphology?in?the?end-wall?band?region?is?a?batch?process?of?crack?propagation,?i.e.?a"stick-slip"process.