Question

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. E For impact problems, you need to use the Transient Structural Analysis system. Explicit Structura analysis F An elastic - perfectly plastic material has a non-zero tangent modulus. Hardening rules describe the direction of plastic straining. flow rules Short answer. (4 points each) a) Describe the difference between mesh convergence and force convergence.

Answer 1

1- True

2- False ( the larger the aspect ratio the performance decreases).

3- True

4- True

5- False ( They are not inverse)

6- False( in general we use explicit solution techniques)

7- True

8- False

9- True

10- False.

I am pretty sure of these answers. Please dear thumpsup for the answer. Thank you.