- #1
ChrisHarvey
- 55
- 0
Hello,
I was wondering if someone could clarify the major differences and limitations of Damage Mechanics and Fracture Mechanics.
I'm more familiar with the fracture mechanics approach, but have never done any damage mechanics before. I'm just trying to sort out in my head how fracture mechanics is situated relative to damage mechanics.
I appreciate the fundamental differences such as:
- damge mech = does not treat individual cracks but instead uses constitutive laws to give defect density variables.
- fracture mech = considers individual damage modes.
However, having compared quite a few sources on the subjects, I'm left quite confused. One says the damage mechanics does not consider individual cracks, but another says it is possible to track a crack's propagation using this method. One source describes the fracture mechanics approach as a boundary value problem limited to simple cases (and thus making it more generic). Surely both approaches depend on the boundary conditions of the problem!? Also, fracture mechanics is in one case described as being a more global approach. How can this be true when it targets individual defects?
I suspect there's some significant bias depending on author's own preferences.
Any guidance will be gratefully received,
Bet regards,
Chris
I was wondering if someone could clarify the major differences and limitations of Damage Mechanics and Fracture Mechanics.
I'm more familiar with the fracture mechanics approach, but have never done any damage mechanics before. I'm just trying to sort out in my head how fracture mechanics is situated relative to damage mechanics.
I appreciate the fundamental differences such as:
- damge mech = does not treat individual cracks but instead uses constitutive laws to give defect density variables.
- fracture mech = considers individual damage modes.
However, having compared quite a few sources on the subjects, I'm left quite confused. One says the damage mechanics does not consider individual cracks, but another says it is possible to track a crack's propagation using this method. One source describes the fracture mechanics approach as a boundary value problem limited to simple cases (and thus making it more generic). Surely both approaches depend on the boundary conditions of the problem!? Also, fracture mechanics is in one case described as being a more global approach. How can this be true when it targets individual defects?
I suspect there's some significant bias depending on author's own preferences.
Any guidance will be gratefully received,
Bet regards,
Chris