Firefly
Active member
Without plotting the design region, can you determine the failure mode?
I did the principal stress equation, and was able to determine that the minimum principal stress has a Safety Factor <2. How am I supposed to know that it fails in Shear and Not Principal stress?
Problem:
a cube with 2" sides, Sy=35,000 psi , Sc= -125,000 psig. Ft=56,000 lbf, Fc=-100,000 lbf, shear=10,000 psi. A Factor of Safety >2 is req'd.
What is the failure mode for this material? Compression, Principal Stress, Tension, Shear.
I did the principal stress equation, and was able to determine that the minimum principal stress has a Safety Factor <2. How am I supposed to know that it fails in Shear and Not Principal stress?
Problem:
a cube with 2" sides, Sy=35,000 psi , Sc= -125,000 psig. Ft=56,000 lbf, Fc=-100,000 lbf, shear=10,000 psi. A Factor of Safety >2 is req'd.
What is the failure mode for this material? Compression, Principal Stress, Tension, Shear.