平板锥形膜盒应力强度因子计算  

Calculation of Stress Intensity Factors for Plane-cone Shaped Bellows

作　　者：董鹏鹏 贺启林 王海洲 王儒文 DONG Peng-peng;HE Qi-lin;WANG Hai-zhou;WANG Ru-wen(Beijing Institute of Astronautical Systems Engineering,Beijing Key Laboratory of Cryogenic Technology Research,Beijing 100076,China)

机构地区：[1]北京宇航系统工程研究所深低温技术研究北京市重点实验室,北京100076

出　　处：《强度与环境》2021年第4期30-36,共7页Structure & Environment Engineering

摘　　要：基于梁理论和薄板理论分别建立了平板锥形焊接膜盒的理论计算模型,推导了膜片焊菇处裂纹尖端的应力强度因子在轴向外载和压力下的计算公式。为评估理论计算公式的准确性,基于ABAQUS的围线积分方法计算了裂纹尖端的应力强度因子。结果表明薄板模型的应力强度因子计算结果与有限元解吻合更好,误差在10%以内。Based on beam and thin plate theory,the theoretical model of plane-cone shaped welded bellows is established,and the formula of the stress intensity factor of the crack tip is derived for the axial load and pressure condition.The stress intensity factor is also calculated by the use of contour integral method of ABAQUS code to evaluate the accuracy of theoretical formula.The results show that the thin plate model coincides better with the finite element method with the error less than 10%.

关 键 词：平板锥形 焊接膜盒 理论模型 应力强度因子 围线积分 

分 类 号：O346.1[理学—固体力学] V421.33[理学—力学]