- #1
twostep08
- 7
- 0
id like to think i did this right, but i just want to make sure. i can't do symbols so let d equal sigma.
the stress components are d_xx= 200 MPa, d_xy= 50 MPa, d_yy=-100 MPa. I need to find the max shear stress, and the principal stresses, and then a_s and a_p.
heres what i got:
max shear= 158
principal stresses= 108 and 208
a_s=-35.8 degrees
a_p=9.2 degrees
am i right?; I am not sure if i need to do anything different since d_yy is negative? i think i used the right equations but not sure, and what would my units be for the stresses ? MPa?
lastly, it asks "denote them on the stress element" (them meaning the things i just found). there's the generic 2-D square with sigma_yy going up from the top, sigma_xx from the right, and sigma_xy parallel to the square. what am i supposed to do about that?
thanks a ton in advance
the stress components are d_xx= 200 MPa, d_xy= 50 MPa, d_yy=-100 MPa. I need to find the max shear stress, and the principal stresses, and then a_s and a_p.
heres what i got:
max shear= 158
principal stresses= 108 and 208
a_s=-35.8 degrees
a_p=9.2 degrees
am i right?; I am not sure if i need to do anything different since d_yy is negative? i think i used the right equations but not sure, and what would my units be for the stresses ? MPa?
lastly, it asks "denote them on the stress element" (them meaning the things i just found). there's the generic 2-D square with sigma_yy going up from the top, sigma_xx from the right, and sigma_xy parallel to the square. what am i supposed to do about that?
thanks a ton in advance