ANSYS varification manual 9

# Dat test case for the saw tooth wave shown below

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Unformatted text preview: Type(s): Buckling Analysis (ANTYPE = 1) Static (prestress) Analysis (ANTYPE = 0) Element Type(s): 2-D Elastic Beam Elements (BEAM3) Input Listing: vm127.dat Test Case Determine the critical buckling load of an axially loaded long slender bar of length has a cross-sectional height h, and area A. with hinged ends. The bar Figure 127.1 Buckling Bar Problem Sketch Material Properties E = 30 x 106 psi Geometric Properties = 200 in A = 0.25 in2 h = 0.5 in Loading F = 1 lb ANSYS Verification Manual . ANSYS Release 9.0 . 002114 . © SAS IP, Inc. 1–286 VM127 Analysis Assumptions and Modeling Notes Only the upper half of the bar is modeled because of symmetry. The boundary conditions become free-fixed for the half symmetry model. A total of 10 master degrees of freedom in the X-direction are selected to characterize the buckling mode. The moment of inertia of the bar is calculated as I = Ah2/12 = 0.0052083 in4 . Results Comparison Target Fcr, lb 1. ANSYS Ratio 38.553 38.553[1] 1.000 Fcr = Loa...
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