Want this question answered?
allowable bending stress for en8
allowable bending stress for en8
Difference in strength, 275 and 355 refer to minimum yield stress of the material (275 MPa and 355 MPa).
ultimate stress=Factor of safety*Allowable stress
Both Fatigue and Creep are causes of failure of a material at a stress value significantly below the Allowable threshold. They differ from each other in the sense that fatigue is defined as the failure of a material, subjected to multiple loading and unloading cycles, even though, in none of the instances, the applied stress crosses the Allowable stress value. The fatigue life of a material is usually specified in # of loading/unloading cycles it can undergo, without failing. The fatigue life decreases as the applied stress approaches the Allowable Stress. CREEP, on the other hand, is time related failure of a material. Creep, explains that a material subjected to a certain applied stress will continue to deform at that constant stress value. Hence, creep results in an increase in strain value while the stress is constant, until it causes the failure of the subject material. CREEP tends to increase with the temperature of the specimen
allowable stress design-2/3rd of yield working stress design is process yield
Depends on temperature.
stress in old concrete
70.4 megapascle
1400Kgf/cm2
1,642 lbs
800n/mm2