压力容器中应力集中与峰值应力关系的讨论  

THE RELATION BETWEEN CONCENTRATED STRESS AND PEAK STRESS OF PRESSURE VESSEL

作　　者：曹占飞[1] 

机构地区：[1]中国石化工程建设公司,北京100101

出　　处：《石油化工设备技术》2006年第4期22-23,共2页Petrochemical Equipment Technology

摘　　要：关于峰值应力的自限性和是否为平衡外载荷所必须的问题已发表了不少文章,有人认为在容器开孔附近,有一部分峰值应力沿壁厚均匀分布,并且不具有自限性,有人认为峰值应力是二次应力的一种,比二次应力具有更高的局部性和自限性。通过应用有限元方法验证了开孔边缘的应力集中具有一次的性质,并根据开孔的大小,将应力集中区分为峰值应力和局部薄膜应力。Many articles about self-limitation of peak stress and the self-limitation being necessity or not to balance the external load are published. . Some of them say that a portion of peak stress is even distributed along wall thickness adjacent to the opening of vessel but without self - limitation,some of them say that a peak stress is one sort of second stress that has ever-higher localization and self - limitation. By using finite element method in this article to verify that stress concentration round opening verge has primary stress characteristic,and also differentiates concentrated stress into peak stress and local membrane stress according to the opening size.

关 键 词：应力集中 峰值应力 应力分类 有限元 

分 类 号：TH49[机械工程—机械制造及自动化]