7A04-T6铝合金圆管的材性试验和本构模型研究  

RESEARCH ON PROPERTIES TEST AND CONSTITUTIVE MODEL OF 7A04-T6 ALUMINUM ALLOY TUBES

作　　者：李进军[1] 丁永君[1] 王衬心 李振宇[2] 荣彬[2] 万纹宇 LI Jinjun;DING Yongjun;WANG Chenxin;LI Zhenyu;RONG Bin;WAN Wenyu(Tianjin University Research Institute of Architectural Design,Tianjin 300073,China;Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学建筑设计研究院,天津300073 [2]天津大学,天津300072

出　　处：《钢结构（中英文）》2019年第12期35-39,共5页Steel Construction（Chinese & English）

摘　　要：为研究7A04铝合金材料的力学性能和本构模型,完成了15个取自圆管管材的材性试样的静力拉伸试验,对比分析了试验所得的应力-应变曲线与Ramberg-Osgood模型、Baehre模型、Mazzolani模型。分析结果表明:Ramberg-Osgood模型与试验所得的应力-应变曲线吻合最好,尤其是在拐点附近;所求得Ramberg-Osgood模型中的应变硬化指数n值略小于SteinHardt的建议取值。In order to study the mechanical properties and constitutive model of 7 A04 aluminum alloy material,the static tensile tests of 15 specimens taken from circular tubes were completed. The stress-strain curves obtained from the test were compared with Ramberg-Osgood model, Baehre model and Mazzolani model. The results showed that the Ramberg-Osgood model agreed best with the stress-strain curves obtained from the test, especially near the inflection point. The strain hardening exponent n in the Ramberg-Osgood model was a little less than the recommended value of SteinHardt.

关 键 词：7A04-T6铝合金 应力-应变曲线 本构模型 应变硬化指数 

分 类 号：TU512.4[建筑科学—建筑技术科学]