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Stress concentartion factors in the beams with hole under pure moment

Dear All,

I have a beam with a hole under pure bending moment. I am very intrested to know is there any

relationship between the moment in the beam section and the stress concentartion (specially tensile stresses due to moment ) around the hole?

Any help will be highly appreciated,

Thank you,

Manooir

Stress concentartion factors in the beams with hole

Dear All,

A section of a beam with hole is subjected to the shear and moment. Assuming that we ignore the moment in the section of the beam, is there any formulation for obtaining the stress concentration due to shear only. I have attached a picture of the problem.

I appreciate your professional comment.

Thank you,

Manooir

 

Cohesive Element in ABAQUS

Hello,

It is some time that I am struggling for making a physical interperation of the MAXSCRT in ABAQUS  and crack initiation.

When the MAXSCRT in ABAQUS in cohesive element is equal to 1, does it mean that the crack has been formed or just it means that irreversible deformation in the element has been formed?

Thank you,

 

Crack length in fracture mechanics

Hi,

I have modeled a beam with a hole in it in ABAQUS. I use of FRACTURE MECHANICS and FINITE ELEMENT METHOD for perdiction of failure load of beams with holes. I am wondering is it a correct assumption to assume a fixed crack length for one beam with varying hole position or not? 

It have assumed that a fixed crack length for a beam with varying location of hole along the beam.

Am I correct?

Thank you,

Manooir

Fracture toughness is equal to fracture energy in LEFM?

Hi,

I am doing some test on the fracture toughness.

I am wondering if in Linear Elastic Fracture Mechanics, Fracture toughness of the material is equal to fracture energy or not?

Can anybody send me an naswer,

Thank you,

Manooir

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