GLARE层板挤压渐进损伤分析

复合材料学报, 2016, 33(4): 884-892. doi: 10.13801/j.cnki.fhclxb.20150709.003

GLARE层板挤压渐进损伤分析

卓越 ^1, , 黎增山 ^2, , 谭日明 ^3, , 关志东 ^4, , 刘准 ^5,

1.北京航空航天大学航空科学与工程学院,北京,100083

2.北京航空航天大学航空科学与工程学院,北京,100083

3.北京航空航天大学航空科学与工程学院,北京,100083

4.北京航空航天大学航空科学与工程学院,北京,100083

5.北京航空航天大学航空科学与工程学院,北京,100083

关键词： GLARE层板 , 挤压 , 渐进损伤 , 试验研究 , 数值模拟

Progressive damage analysis of GLARE laminates under bearing load

Keywords： GLARE laminate , bearing , progressive damage , test investigation , numerical simulation

对GLARE3 6/5层板进行挤压性能试验研究,采用超声C扫描、断口微距拍摄和扫描电子显微镜等方法观测GLARE层板挤压渐进损伤过程和最终破坏模式.结果表明:GLARE层板挤压起始损伤为铝合金塑性变形;损伤扩展阶段,0°纤维主要承受挤压正应力,铝合金塑性变形增大,铺层间分层起始并扩展;0°纤维屈曲折断后层内纤维基体损伤和分层损伤急剧扩展,层板最终发生挤压破坏.将GLARE层板挤压失效分为层内失效和层间失效,采用应变描述的Hashin准则和界面单元方法并引入金属塑性建立GLARE层板挤压渐进损伤数值模型,数值模型对层板损伤起始位置、分层产生位置、损伤演化过程、最终破坏模式及破坏载荷进行了预测,计算结果与试验结果吻合较好,说明该计算方法能够有效模拟GLARE层板挤压渐进损伤性能.

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