板的弹－塑性屈曲强度  

Elastic- Plastic Buckling Strength of Plates

作　　者：颜少荣[1] 高轩能[1] 孙祖龙[1] 

机构地区：[1]南昌大学土木工程系

出　　处：《南昌大学学报（工科版）》1996年第4期5-11,共7页Journal of Nanchang University(Engineering & Technology)

摘　　要：采用里兹法，对三边简支一边自由的板在非均匀板面内压力作用下板的弹塑性屈曲强度作了较全面的理论分析．在塑性范围内应用割线模量的全量理论并考虑材料的可压缩性，确定了各种荷载分布情况下板的临界宽厚比．对一定数量的冷弯薄壁槽形截面和角形截面试件进行了屈曲破坏试验．试件翼缘或角钢一肢比拟上述边界条件的板，其试验结果与理论分析吻合．To adopt the Ritz method to analyse elastic- plastic buckling strength of the rectangular plate with three edges simply supported and one edge free under nonuniform compression.In the plastic range, the expression is based on the deformation theory, thinking of the material as compressible. The critical ratios of width to thickness of the plate under various loading distributed conditions are presented completely.A number of the specimens made of the coldformed thin- walled channel section and angle section are tested for buckling failure.considering the flangs and single leg as plates with the above boundary conditions,the theoretical results are in good agreement with the data of the tests.

关 键 词：板 弹塑性 屈曲强度 临界宽厚比 

分 类 号：O343.9[理学—固体力学]