![]() Creep is more severe in materials that are subjected to heat for long periods and generally increases as they near their melting point. ![]() The creep rate is controlled by minimizing the stress and temperature of a material. If the creep rate increases rapidly, the strain becomes so large that it could result in failure. Of course, for its determination, creep tests must be conducted to the point of failure these are termed creep rupture tests.Ĭreep becomes a problem when the stress intensity is approaching the fracture failure strength. turbine blades in military aircraft), time to rupture is the dominant design consideration. For many relatively short-life creep situations (e.g. Creep is very important in power industry and it is of the highest importance in designing of jet engines. Creep is a very important phenomenon if we are using materials at high temperature. The rate of deformation is a function of the material’s properties, exposure time, exposure temperature and the applied structural load. It results due to long time exposure to large external mechanical stress with in limit of yielding and is more severe in material that are subjected to heat for long time. Creep, known also as cold flow, is the permanent deformation that increases with time under constant load or stress.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |