Question

strengths.

Answer 1

You want to see my work too? Give me a sec.

Answer 2

Thanks, I just took a look.
I was wondering, it seems to be a 2-d problem. You seem to involve a 3-d orthogonal component (sigma3). Perhaps I missed something.

Answer 3

The centre of the circle is (35+138)/2=86.5. You put 85, must be a typo.

Answer 4

That might correct your first answer.

Answer 5

Okay let me try this.

Answer 6

It fixed the sigma x.

Answer 7

still need tauxy

Answer 8

Tau would be Rsin(2theta).

Answer 9

That is what I used for tau

Answer 10

Tau_xy = 30.9 MPa

Answer 11

I have Rsin(33.69)=51.5sin(33.69)=28.57.

Answer 12

how did you get 33.69 degrees?

Answer 13

tan(2t)=2/3, so atan(2/3)=33.69 deg.

Answer 14

where you get 2/3?

Answer 15

Question says k=2/3, and theta_p=1/2atan(k)

Answer 16

* (1/2)atan(k)

Answer 17

okay that is where I went wrong.

Answer 18

I got the right tau.

Answer 19

Good!
I think you have everything you need to organize this.
Post what you have when you have a chance. I have to go now.
Is everything ok, so far?

Answer 20

Yep! Thanks for your help.

Answer 21

No problem, talk later!