FEA, thermal stress analysis, brittle material

[LDREAD]

Dear All,
I have done the thermal stress analysis remelting process using APDL. In post processing which stress should I extract. since my material brittle should I go for principal stress or vonmises stress. Please do suggest me.

 

[gravityandinertia]

Max. Principal stress is usually reserved for brittle materials. von Mises criteria is for ductile materials, where they can yield and have interactions between their different stress directions.

 

[LDREAD]

thank you