Abstract：Based on Mises yielding condition theory, incremental theory and the assumption that the material is ideal elastoplastic, this paper obtained stress components of thinwalled straight bar with close section under tension, compression and torsion combined deformation by using nondimensional method. When thinwalled straight bar with close section is subjected to tension, compression and torsion combined deformation, and that the materials get to the plasticity stage, two correlative ordinary differential equations in respect with the compression and torsion subjected on the thinwalled straight bar with close section are obtained based on the theoretical analysis. Stress components can be obtained with analytical solution by solving the ordinary differential equation. Those will lay the foundation for the studies on buckling and stability of thinwalled straight bar with close and open section.
田其磊，李四平，王熙. 闭口薄壁截面直杆的塑性解[J]. 上海交通大学学报（自然版）, .
TIAN Qi-lei,LI Si-ping，WANG Xi. Plastic Solution of ThinWalled Straight Bar with Close Section. J. Shanghai Jiaotong Univ.(Sci.) , 2008, 42(11): 1919-1921.
