A large diamond shape structure with two pin joints and two rigid joints is subjected to a compressive load at the two opposite corners.
Determine the load-displacement curve at the point of load application for applied load up to 40,000 lbs.
The material properties for the frame are:
Modulus of Elasticity = 30,000,000 psi
Poisson's Ratio = 0.0
Shear Modulus = 15,000,000 psi
The section properties for the frame are:
Axx = 1.0 in2
Iyy = 0.08333 m4
Izz = 0.08333 m4
In primary load case 1, point loads of 1,000 lbs each are applied at the top and bottom points of the frame.
F1 -Z = -1,000 lb
F3-Z = +1,000 lb
20 equal load increments are defined for computing the loaddeflection behavior of the structure from P = 2,000 to P = 40,000 lbs. The load-deflection option is used in defining the load combination data.
The finite element model consists of 120 beam elements and 120 joints.
Tested Features
Reference
- T. J. R. Hughes and W. K. Lui,"Nonlinear Finite Element Analysis of Shells - Part II: Two Dimensional Shells", Comp. Meth. Appl. Mech. Eng., 27 (1981), 167-181.
- EMRC, "NISA II Verification Problems Manual", 1991.