Problem 3 (10 pts, suggested time 5 mins). In class we considered the mutiphysics problem of thermal stresses in a rod. When using linear shape functions, we found that the stress in the rod is affected by unphysical oscillations like in the following plot E*(ux-a*T) 35000 30000 25000 20000 15000 10000 5000 -5000 -10000 0 Line Graph: E*(ux-a*T) MULT 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Arc length (a) [10pts] What is the origin of this issue and how can we fix it?

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Problem 3 (10 pts, suggested time 5 mins). In class we considered the mutiphysics
problem of thermal stresses in a rod. When using linear shape functions, we found that the
stress in the rod is affected by unphysical oscillations like in the following plot
E*(ux-a*T)
35000
30000
25000
20000
15000
10000
5000
-5000
-10000
0
Line Graph: E*(ux-a*T)
MULT
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
Arc length
(a) [10pts] What is the origin of this issue and how can we fix it?
Transcribed Image Text:Problem 3 (10 pts, suggested time 5 mins). In class we considered the mutiphysics problem of thermal stresses in a rod. When using linear shape functions, we found that the stress in the rod is affected by unphysical oscillations like in the following plot E*(ux-a*T) 35000 30000 25000 20000 15000 10000 5000 -5000 -10000 0 Line Graph: E*(ux-a*T) MULT 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Arc length (a) [10pts] What is the origin of this issue and how can we fix it?
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