Maximum von Mises stress
|
σlimit / σvonMises |
Ductile
|
Maximum shear stress
|
σ limit / (2 * τmax ) |
Ductile
|
Mohr-Coulomb stress
|
If ( σ1> 0 and σ3 > 0 ) then ( σ1 ≥ σTensileLimit )
If ( σ1< 0 and σ3 < 0 ) then ( σ3 ≥ -σCompressiveLimit )
- If ( σ1≥ 0 and σ3 ≤ 0 ) then ( σ1 / σTensileLimit + σ3 / -σCompressiveLimit ≥1 )
|
Brittle materials with different tensile and compressive strengths
|
Maximum normal stress
|
σ limit / σ1 |
Brittle
|
Maximum stress criterion (composites)
|
![](ofd1450460667319.image) FOS = 1 / F.I.
|
Brittle
1 and 2 stand for material directions. X and S are normal and shear strengths of the composite.
|
Tsai-Hill Failure criterion (composites) |
![](mtp1450460668698.image) FOS = 1 / SQRT (F.I.)
|
Brittle
|
Tsai-Wu Failure criterion (composites)
|
![](qaz1450460669553.image)
![](ynu1450460670042.image)
|
Brittle
|