CAJ | 학술논문

针对玻璃纤维增强铝合金层板进行了等幅拉-拉疲劳试验，研究了含中心缺口玻璃纤维增强铝合金层板在疲劳载荷作用下的裂纹扩展和分层扩展机制。随裂纹长度增加，其疲劳裂纹扩展速率基本保持定值，分层与裂纹长度为线性关系。基于有限元模型进行数值计算，建立了等效应力强度因子方法，使用等效Paris公式对裂纹扩展速率进行预测，对比试验结果，吻合良好。这说明了该数值方法可用于预测纤维增强铝合金层合板的疲劳裂纹扩展。
침대파리섬유증강려합금층판진행료등폭랍-랍피로시험，연구료함중심결구파리섬유증강려합금층판재피로재하작용하적렬문확전화분층확전궤제。수렬문장도증가，기피로렬문확전속솔기본보지정치，분층여렬문장도위선성관계。기우유한원모형진행수치계산，건립료등효응력강도인자방법，사용등효Paris공식대렬문확전속솔진행예측，대비시험결과，문합량호。저설명료해수치방법가용우예측섬유증강려합금층합판적피로렬문확전。
Constant amplitude tension-tension fatigue experiments were done on glass-fiber reinforced aluminium laminates.The fatigue crack growth and delamination growth were investigated on centre crack specimens .Crack growth rate almost kept constant with crack growing , and delamination length kept linear relation with crack length . Based on finite element method analysis method , the effective stress intensity factors were established at crack tip , and Paris-law was used to predict the crack growth rate .It is shown that the numerical results agree with experimen-tal results;this agreement proves that this method can be used to predict fatigue crack growth rates in this hybrid laminate.