Hi,

I'm struggling to answer this fracture mechanics question. I have wrote a quick summary what i have calculated so far. Please help.

A material has a shear modulus of 7.65 GN/M^2. When a solid body of this material is subject to a hydrostatic pressure of 1GN/M^2, its volume decreases by 5%. The Poisson's ratio is 0.33, and the young’s modulus =20.4GN/M^2. The strain energy release rate is 0.5kl/m^2, which gives a critical rate of 3.383MNm^-3/2.

My main concern is how to I get the axial stress and tensile yield stress for the part below ?

A bar of this material of square sect

Question

Hi,

I'm struggling to answer this fracture mechanics question. I have wrote a quick summary what i have calculated  so far.  Please help.

A material has a shear modulus of 7.65 GN/M^2. When a solid body of this material is subject to a hydrostatic pressure of 1GN/M^2, its volume decreases by 5%.  The Poisson's ratio is 0.33, and the young’s modulus =20.4GN/M^2. The strain energy release rate is 0.5kl/m^2, which gives a critical rate of 3.383MNm^-3/2. 

My main concern is how to I get the axial stress and tensile yield stress for the part below ?

A bar of this material of square sect