Study of damage mechanism on aluminum alloy under two kinds of stress states and FEM simulation

	Study of damage mechanism on aluminum alloy under two kinds of stress states and FEM simulation
	Zhu, Hao; Zhu, Liang; Chen, Jian-Hong
	2007
关键词	aluminum alloy damage mechanism stress triaxiality FEM simulation
卷号	353-358
页码	1157-1160
英文摘要	In order to study the damage mechanism under different stress states of aluminum alloy components, two kinds of representative triaxial stress states were adopted, namely notch tensile and pure shear. The results of study showed: During the notch tensile test, stress triaxiality in the least transverse-section was relatively higher. With increasing applied stress, the volume fraction of the microvoid in notch root was increasing constantly. When microvoid volume fraction reached the critical value, the specimen fractured. During the pure shear test, stress triaxiality almost came up to zero, and there was almost no micro-void but localized shear bands within the specimen. The shear bands resulted from non-uniform deformation constantly under the shear stress. With stress concentrating, the cracks were produced in the shear bands and later coalesced. When the equivalent plastic strain reached the critical value, the specimen fractured. The modified Gurson damage model and the Johnson-Cook model were used to simulate the notch tensile and shear test respectively. Simulated engineering stress-strain curves fit the measured engineering stress-strain curves very well. In addition, the empirical damage evolution equation for the notch specimen was obtained from the experiment data and FEM simulations.
会议录	PROGRESSES IN FRACTURE AND STRENGTH OF MATERIALS AND STRUCTURES, 1-4
会议录出版者	TRANS TECH PUBLICATIONS LTD
会议录出版地	LAUBLSRUTISTR 24, CH-8717 STAFA-ZURICH, SWITZERLAND
语种	英语
WOS研究方向	Materials Science
WOS记录号	WOS:000252246300276
内容类型	会议论文
源URL	[http://119.78.100.223/handle/2XXMBERH/38118]
专题	材料科学与工程学院
通讯作者	Zhu, Hao
作者单位	Lanzhou Univ Technol, State Key Lab Gansu Adv Non Ferrous Met Mat, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Hao,Zhu, Liang,Chen, Jian-Hong. Study of damage mechanism on aluminum alloy under two kinds of stress states and FEM simulation[C]. 见:.