This preview shows page 1. Sign up to view the full content.
Unformatted text preview: strain-free” condition and then removing
the uniform thermal load. Determine the axial stresses and the thermal strains in the three sections of the bar
at the end of this sequence of loading operations. Figure 194.1 Fixed Bar with Thermal Loading Problem Sketch Material Properties
E = 30 x 106 psi
α = 0.00005 in/in-°F Geometric Properties
L = 10 in
b = 1 in Loading
Load Step 1: ∆T = 100°F
Load Step 2: Elem 2 dead
Load Step 3: Elem 2 alive
Load Step 4: ∆T = 0°F Analysis Assumptions and Modeling Notes
The REFT material property is used to model “rebirth” of the “dead” element such that no thermal strains exist
at birth. This is achieved by specifying the value of REFT equal to the uniform temperature of the bar (100°F).
Removing the thermal load in the subsequent final load step therefore results in relieving the thermal strains in
elements 1 and 3. Element 2 on the other hand, experiences a thermal load of ∆T = -100°F resulting in a negative
thermal strain. ANSYS Verification Manual . ANSYS Release 9.0 . 002114 . © SAS IP, Inc. 1–440 VM194 Results Comparison
Load Step No. 4 ANSYS Ratio Stressx , psi 150,000 150,000 1.000 Strainth , (elem1, 3) 0.0 0.0 - Strainth , (elem 2) 1. Target -0.005 -0.005 1.000 Uniform for all el...
View Full Document
This note was uploaded on 12/09/2010 for the course DEPARTMENT E301 taught by Professor Kulasinghe during the Spring '09 term at University of Peradeniya.
- Spring '09
- The Land