带U形缺口梁弯曲的局部应力和极限载荷的工程计算方法  

An Engineering Method for Calculating Local Stress and Ultimate Load of Flexural Beam with U-shaped Notches

作　　者：夏旭标[1] 刘勇[1] 任贤鹏 

机构地区：[1]浙江工学院

出　　处：《浙江工学院学报》1992年第3期53-59,共7页

摘　　要：本文根据折线形截面假设,探讨了一种计算带对称U形缺口梁弯曲的弹塑性局部应力和极限载荷的工程方法.文中分析了缺口宽系数(ρ/a)和缺口深系数(t/a)对局部应力的影响,比较了深缺口和浅缺口这两种情况,并给出了极限载荷与弹塑性交界面的关系.On the basis of the multi-section assumption, an engineering method for calculating elastoplastic local stress and ultimate load of flexural beam with symmetrical U-shaped notches is discussed in this paper. The influences to local stress induced by both width factor (ρ/a) and depth factor (t/a) of notches are studied herein. After comparing two cases of shallow and deep notches, the correlation between ultimate load and elastoplastic juncture is achieved.

关 键 词：梁 弯曲 局部应力 极限载荷 应力集中 

分 类 号：TB123[理学—工程力学]