Spring 2008, MET 415 - FEA Applications I
Prof. Dave Johnson, dhj1@psu.edu
Penn State - Erie, The Behrend College
Homework Assignment 9B
Typical MET 320 Test
Problem for FEA-1:
You decide:
- 2D or 3D ? Solid or Shell or other ?
- Symmetry or no symmetry ?
- Linear or Non-linear material properties
?
- Small or Large deformation effects ?
- Are load steps/substeps/gradual loading
necessary ?
- How to apply the given load ?
- How to constrain the part ?
- How to evaluate the mesh error ?
Two sections of metal strap are 2 mm thick and are welded together along the
25o angle joint.
The centered force P is 2000 N.
Material properties: structural steel
Evaluate the normal and shear stress along the weld line.
Model with two bodies to include the weld joint.
Create a Simulation Coordinate System, oriented along the weld line to permit presentation of stress parallel to and perpendicular to the weld line.
Use “scoping” or "selecting" to see the real stress in each body separately.
Are these results accurate considering finite element mesh error ?
Turn in:
- Document your modeling decisions:
- 2D or 3D ? Solid or Shell or other ?
- Symmetry ?
- Linear or Non-linear material properties
?
- Small or Large deformation effects ?
- Are load steps/substeps/gradual loading
necessary ?
- How to apply the given load ?
- How to constrain the part ?
- How to evaluate the mesh error ?
- A plot showing the mesh
- REPORT:
- the number of nodes and elements used
- ALL element types used
- An "environment" plot showing all the
loads and constraints on the model
- A plot CLEARLY showing the distribution of the shear stress
parallel to the weld, along the weld line.
- A plot CLEARLY showing the
distribution of the normal stress perpendicular to the weld, along the weld line.
- A plot showing the maximum deformation that occurs on the
model.
- A plot (or plots) evaluating the mesh error
- List all singularities which may exist on this
model.
- Any hand calculations you used to validate and
verify your model.