Question

FEA

1. Answer True or False below. (2 points each) When performing a nonlinear FE analysis, pressure is considered a “follower force.” Once an element aspect ratio exceeds 1, the larger the aspect ratio, the better the element performs. Eigenvalue buckling provides a good estimate of the Euler critical buckling load. It is important to include the Bauschinger effect in your FE model when simulating problems that experience large strain. Buckling can be considered as the inverse of stress stiffening. Most of the assignments in your textbook used the implicit solution technique. A nonlinear time step converges when the force convergence value is less than the criterion. For impact problems, you need to use the Transient Structural Analysis system. An elastic - perfectly plastic material has a non-zero tangent modulus. Hardening rules describe the direction of plastic straining.

Answer 1

• When performing a nonlinear FE analysis, pressure is considered a “follower force.”- True
• Once an element aspect ratio exceeds 1, the larger the aspect ratio, the better the element performs.- False
• Eigenvalue buckling provides a good estimate of the Euler critical buckling load.- True
• It is important to include the Bauschinger effect in your FE model when simulating problems that experience large strain. - True
• Buckling can be considered as the inverse of stress stiffening.- False
• Most of the assignments in your textbook used the implicit solution technique.- True
• A nonlinear time step converges when the force convergence value is less than the criterion.- True
• For impact problems, you need to use the Transient Structural Analysis system.- True
• An elastic - perfectly plastic material has a non-zero tangent modulus.- False
• Hardening rules describe the direction of plastic straining.- False