OS-V: 0290 Lee's Frame Postbuckling
Examines the postbuckling behavior of an L-shaped frame (Lee’s frame) loaded by a vertical point load.
Model Files
Benchmark Model
The frame was meshed with first order CBAR elements of size 120 mm and a rectangular cross-section of 30 mm x 20 mm was assigned. The z-translational degree of freedom (DOF) was constrained using Single Point Constraints (SPCs) for all the nodes to prevent out of plane motion, while the x and y translational DOFs were constrained using SPCs for the end nodes. The frame was loaded along the negative y-direction with a load of P = 20 kN and the problem was solved using the Arc Length Method.
- Material Properties
- Value
- Young's modulus
- 71.74 x 103 Nmm-2
- Poisson's ratio
- 0.3
Results
- I
- Area moment of inertia of the beam
- y
- Vertical deflection
Reference
NAFEMS P10 - Finite Element Benchmarks for 2D and Axisymmetric Shells Involving Geometric Nonlinearity