Paulettaa
Mechanical
- Mar 17, 2018
- 60
Dear All
I am running an elastic-plastic analysis of an equipment as per ASME BPVC VIII-2 Ed. 2021. I have some questions hope you could help me.
1- I am using Ansys workbench. As I understand in material properties for FEA true plastic strain vs true stress shall be the input data. Based on the procedure in Annex 3-D which quantity needs to be considered as true strain in the FEA? is it Gamma1+Gamma2?
2- If an elastic stress method is applied and joint efficiency for a given component is less than one then I multiply the allowable stress by the value of joint efficiency. What about elastic-plastic method? Do I have to increase the load factor or decrease the thickness or something else?
3- The load factor beta, depends on the class of component in division 2. What if I want to run an elastic-plastic analysis for a division 1 component? Do I need to take beta to be 3.5?
Warm Regards
I am running an elastic-plastic analysis of an equipment as per ASME BPVC VIII-2 Ed. 2021. I have some questions hope you could help me.
1- I am using Ansys workbench. As I understand in material properties for FEA true plastic strain vs true stress shall be the input data. Based on the procedure in Annex 3-D which quantity needs to be considered as true strain in the FEA? is it Gamma1+Gamma2?
2- If an elastic stress method is applied and joint efficiency for a given component is less than one then I multiply the allowable stress by the value of joint efficiency. What about elastic-plastic method? Do I have to increase the load factor or decrease the thickness or something else?
3- The load factor beta, depends on the class of component in division 2. What if I want to run an elastic-plastic analysis for a division 1 component? Do I need to take beta to be 3.5?
Warm Regards