Why do the design of mechanical parts (flanges and elbows) be based on the yield limit?
Hello friends, usually to do the experiment to the material ontology; have tensile, bending, impact, flattening, flaring, cyclamic, normal temperature test 20 degrees Celsius, is 20 degrees Celsius, minus 20 degrees Celsius, the test to the material, to be determined after completion of the test material meets the design requirements. Is the so-called (to yield limit for design basis?)
In order to reach the yield limit, it is the failure of the material to begin the elasticity, and the elastic-plastic stage has been started. This is designed according to GB150-1998. You can look at the analysis data of the blasting process of the steel
When the metal material reaches its yield limit, the plastic deformation still goes on without increasing the external force. The general mechanical parts (flanges, elbows) and engineering structural parts are not allowed to produce plastic deformation, otherwise it will fail and accidents. Therefore, the design of mechanical parts (flanges and elbows) mostly takes the yield limit as the design.
