翻译英文：内容摘要：随着薄壁梁在工程中越来越多的应用,薄壁梁深入到各个领域中,具有自重小、节省材料等优点.材料力学中研究切应力,大多应用切应力互等定理及其推论（横截面近边界

Question

翻译英文：
内容摘要：
随着薄壁梁在工程中越来越多的应用,薄壁梁深入到各个领域中,具有自重小、节省材料等优点.材料力学中研究切应力,大多应用切应力互等定理及其推论（横截面近边界处的切应力与边界平行）,先判定切应力的方向,在研究切应力的数值.判定横截面上切应力的方向依据有三条：第一,近边界处的切应力与边界平行；第二,切应力的方向必须与对应内力一致；第三切应力的方向、大小应是连续变化的.实心梁的切应力集中在最外层,大多数可以忽略,而薄壁梁就不行了,工程中薄壁梁横截面的切应力显出相当重要的作用.
关键词：薄壁梁 切应力 强度 应用

Answer 1

Abstract:
With the thin-walled beams project more and more applications, thin-walled beam deep into the various areas, with a small weight saving materials and so on. Studied mechanical shear stress, shear stress is mostly applied reciprocal theorem and its corollary (cross-section near the boundary of the shear stress and boundary parallel), first determine the direction of shear stress, shear stress values in the study. Determine the direction of shear stress in cross section are based on three: first, near the boundary of the shear stress and boundary parallel; second, the direction of shear stress must be consistent with the corresponding internal force; third shear stress direction, the size should be a continuous change of. Solid beam of shear stress on the most outer layer, most can be ignored, and the thin-walled beam on to die, engineering thin-walled beam cross-section of the shear stress show an important role.
Key words: thin-walled beamAbstract:
With the thin-walled beams project more and more applications, thin-walled beam deep into the various areas, with a small weight saving materials and so on. Studied mechanical shear stress, shear stress is mostly applied reciprocal theorem and its corollary (cross-section near the boundary of the shear stress and boundary parallel), first determine the direction of shear stress, shear stress values in the study. Determine the direction of shear stress in cross section are based on three: first, near the boundary of the shear stress and boundary parallel; second, the direction of shear stress must be consistent with the corresponding internal force; third shear stress direction, the size should be a continuous change of. Solid beam of shear stress on the most outer layer, most can be ignored, and the thin-walled beam on to die, engineering thin-walled beam cross-section of the shear stress show an important role.
Key words: thin-walled beam tangential stress intensity application