Creo Simulate > Creo Simulate Verification Guide > Buckling Analysis Problems
Buckling Analysis Problems
This chapter contains a buckling analysis problem and Structure's results. In a buckling analysis, Structure calculates buckling load factors and mode shapes that determine the critical magnitudes of load at which a 3D structure will buckle. Structure also automatically calculates all predefined measures. This list of measures differs based on the analysis type.
This chapter contains the following models:
mvsb002: Buckling Analysis of Composite Lay-up
Analysis Type:
Buckling Transversely Isotropic
Model Type:
3D
Comparison:
MSC/NASTRAN
Reference:
Jones, R.M., Mechanics of Composite Material, Hemisphere Publishing Corp., 1975, pp 260-261.
Description:
A four-layered transversely isotropic square plate is simply-supported and subjected to an in-plane load. Determine the buckling load factor.
Specifications
Element Type:
shell
Units:
IPS
Dimensions:
length: 10
width: 10
thickness: 0.1
Ply lay-up: 0/90/90/0
Thickness of each ply: 0.025
Shell Properties:
Extensional Stiffness
A11=1.54e06
A12=18,779
A16=0
A16=0
A26=0
A66=37,500
Extensional–Bending Coupling Stiffness
B11=0
B12=0
B16=0
B22=0
B26=0
B66=0
Bending Stiffness
D11=2,198.75
D12=15.6495
D16=0
D22=367.762
D26=0
D66=31.25
Transverse Shear Stiffnesses
A55=32,553
A45=0
A44=17,940
Material Properties:
Mass Density: 0.002
Cost Per Unit Mass: 0
Young's Moduli
E1=3e7
E2=750,000
E3=750,000
Poisson's Ratio
Nu21=0.25
Nu31=0.25
Nu32=0
Shear Moduli
G21=375,000
G31=375,000
G32=E2/[2*(1+Nu32)]
Coefficients of Thermal Expansion
a1=0
a2=0
a3=0
Constraints:
Fixed in out of plane (z-direction) translation along all outer edges (AB, BC, CD, and DA).
Fixed in translation in all directions at point D
Fixed in x & z-direction translation at point A
Loads:
In-plane force/unit length load=1:
in +x-direction along edge DA
in -x-direction along edge BC
Comparison of Results Data
Theory
Structure
% Difference
Buckling Load Factor
268.73
267
0.6%
Convergence %: 0.0 % on buckling load factor.
Max P: 6
No. Equations: 455
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