33. According to Von-Mises’ distortion energy theory, the distortion energy under
three dimensional stress state is repreented by
1 2
(A)
12 22 32 (
1 2 3 2 1 3)
2E σ + σ + σ − ν σ σ + σ σ + σ σ
ν σ σ σ ν σ σ σ σ σ σ
−
(B)
12 22 32 (
1 2 3 2 1 3)
6E 2
+ + + + +
ν σ σ σ σ σ σ σ σ σ
+
1
(C)
12 22 32 (
1 2 3 2 1 3)
+ + − + +
3E
(D)
12 22 32 (
1 2 3 2 1 3)
3E σ + σ + σ − ν σ σ + σ σ + σ σ
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