CONSTRAINT ASSESSMENT FOR CRUCIFORM SPECIMENS WITH A SEMI ELLIPTICAL CRACK

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	CONSTRAINT ASSESSMENT FOR CRUCIFORM SPECIMENS WITH A SEMI ELLIPTICAL CRACK
	Cao YP.; Qian GA(钱桂安); He YB.; Chao YJ.
	2019
会议日期	JUL 15-20, 2018
会议地点	Prague, CZECH REPUBLIC
页码	UNSP V06AT06A034
英文摘要	A real crack to be assessed in a RPV is generally a shallow crack subjected to biaxial far-field stresses. However, the fracture toughness Ke or Je, which is an important material property for the structural integrity assessment of RPV containing cracks, are usually tested on deep cracked compact tension [C(T)] or single-edged bending [SE(B)] specimens under uniaxial loading. The fracture toughness data do not reflect the realistic biaxial loading state that the cracks are subjected to. Cruciform bending [CR(B)] specimen is therefore developed to simulate the biaxial stress state. In this paper, a series of finite element (FE) simulations of the CR(B) specimens containing different semi-elliptical cracks are conducted, Stress-strain curves of materials of different yield strength and hardening behavior reflecting the variation in the mechanical properties of RPV steels due to aging or temperature change are implemented into the finite element models. The J-A2 theory is applied to analyze the crack tip constraint. The results show that the biaxial effect is material property dependent and affected by load levels.
会议录	PROCEEDINGS OF THE ASME PRESSURE VESSELS AND PIPING CONFERENCE, 2018, VOL 6A
资助机构	HTGR Nuclear Power Plant of China [2014ZX06002001]
语种	英语
ISBN号	978-0-7918-5167-8
WOS记录号	WOS:000460998900034
内容类型	会议论文
源URL	[http://dspace.imech.ac.cn/handle/311007/78552]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.{Cao, Yupeng、He, Yinbiao} Shanghai Nucl Engn Res & Design Inst, Dept Component Res & Design, Shanghai 200237, Peoples R China 2.{Qian, Guian} Chinese Acad Sci, State Key Lab Nonlinear Mech LNM, Inst Mech, Beijing 100190, Peoples R China 3.{Chao, Yuh J.} Univ South Carolina, Dept Mech Engn, Columbia, SC 29208 USA
推荐引用方式 GB/T 7714	Cao YP.,Qian GA,He YB.,et al. CONSTRAINT ASSESSMENT FOR CRUCIFORM SPECIMENS WITH A SEMI ELLIPTICAL CRACK[C]. 见:. Prague, CZECH REPUBLIC. JUL 15-20, 2018.