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《Journal of Zhejiang University(Natural Science)》 1993-02
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The torsional stiffness matrix of a thin-walled bedm considering secondary shear stress and it's finite element analysis

Guo Yimu Lu Zutong Zhang Yajun(Department of Mechanics)  
Tht torsional stiffness matrix of a thin-walled beam element based on the warping displacement assumption. is derived in this paper. The general stiffness matrix of the element when the beam is under tension (or compression),bending and torsion simultaneously is given. The combination of two elements with different cross-sections is studied and the compatibiliy of displacements for them is satisfied in the sense of least aquare technique. The numerial results are presented at the end.
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