VERSE 发表于 2025-3-21 18:23:14
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Theories of Torsion,der an externally applied axial torque .. Let the shaft length be ., the material’s rigidity modulus ., the section’s radius . and the polar second moment of area .. Consider the cylindrical core element in Fig. 7.1a of radius . lying within a solid shaft of outer radius . (Fig. 7.lb) when one end i初次登台 发表于 2025-3-22 02:32:14
Buckling of Struts,cted to a purely compressive load, would compress and not buckle. Buckling is therefore the result of imperfections that prevent the load from being applied perfectly axially; e.g. from eccentric loading and lack of initial straightness. The combined effects of these imperfections on overall bucklinSTERN 发表于 2025-3-22 05:37:05
Strain Energy,ctively the heat and work transfers to and from a system which produce a change . in its internal energy. Consider the closed system as a solid elastic body in equilibrium with the forces that are applied to it. With a small increase in these forces, external work (−.) is done on the body and this w猛烈责骂 发表于 2025-3-22 08:52:04
Stress and Strain Analyses,ress for each of two perpendicular directions, . and ., consists of normal and shear stress acting together. We wish to determine the normal and shear stresses (. ,.) along any direction inclined at . to .. It will be seen that analytical, graphical and matrix methods are available for this and othe翅膀拍动 发表于 2025-3-22 16:12:41
Theories of Strength,as been reached. It has been seen that simple tensile or compressive yielding can be avoided when the introduction of a safety factor imposes a maximum allowable elastic stress limit for a material. In practice stress states are often biaxial or triaxial, e.g. a plate with forces distributed over itAWE 发表于 2025-3-22 18:14:05
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Strain Energy,red within the body. It is possible to derive . for elastic materials that obey Hooke’s law. We need only consider two basic stress systems, direct and shear, to determine . for all loading combinations. External forces associated with the direct strain energy expression will include tension, compreKindle 发表于 2025-3-23 07:10:22
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