凹槽对6063铝合金力学性能的影响

打开文本图片集

中图分类号：TG115.5；TB115.1 文献标志码：B

Effect of notch on mechanical property of 6063 aluminum alloy

YANG Tingweia， WANG Guana，b， KOU Linyuana，b，REN Xuea，LI Xinhuia，LIU Hongpinga，WANG Genga

（a.School of Mechanical Engineering；b.Ningxia CAE Key Laboratory of Intelligent Equipment， Ningxia University，Yinchuan ，China）

Abstract： To investigate the efect of notches on the mechanical properties of 6O63 aluminum aloy，five different specimens with single notch and double notches（the space of the two notches is 1.O，2.0，3.0， and 4.0mm ，respectively） are designed，and its mechanical properties are analyzed using room temperature uniaxial tension experiment combined with numerical simulation method. The results show that the local notch cause a significant decrease in the plasticity of the plate and a significant reduction in fracture displacement；the stress of specimens with notch/notches is higher，and its stress concentration is more serious.

Key words： aluminum alloy；defect；failure；uniaxial tension； stress concentration

0 引言

6××× 系铝合金比强度高、密度低、抗冲击性能优良、耐腐蚀，常用于汽车防撞梁、电池托盘等[1]6063铝合金为Al-Mg-Si合金，具有密度低、强度高、可塑性强、可焊接、耐腐蚀等优点，广泛应用于飞机、汽车等，是轻量化的理想材料之一[2]。（剩余5607字）