Torque is force applied at a distance that causes a change in angular momentum. (Note that this is different from tensile and compressive loads, which produce a uniform stress over the object’s cross-section.) In a material’s elastic range, shear stress is distributed along the radius of a shaft, from zero at the center of the shaft to a maximum at the outer edge. The torsion, or twist, induced when torque is applied to a shaft causes a distribution of stress over the shaft’s cross-sectional area. Normal stress and normal strain (which are caused by tension and compression) occur when a force is applied normal (perpendicular) to an area. Shear stress and shear strain (which are caused by torsional loads) occur when a force is applied parallel or tangent to an area. Stress is a material’s resistance to an applied force, and strain is the deformation that results from stress. Similar to structures under tension or compression, two important mechanical properties of shafts under torque loads are shear stress and shear strain. Power transmission shafts - on motors and gearboxes, for example - are subjected to torque loads that result in torsion, or twisting of the shaft about its axis.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |