ME版 - need help on fracture mechanics |
|---|
|
| 相关主题 |
|---|
| ● Job Opening: Mechanical Engineer, PH.D., FEM, Fracture Mechanics | ● 请教做mechanical property测量的仪器 | | ● Master Thesis 做什么会更好找工作一点？Electro-Mechanical S | ● Research Engineer: Ph.D., FEM, Structural & Fracture Mechanics | | ● ME的工资水平（有经验） | ● Job Opening: Fracture Mechanics ! | | ● RA opening in U-Iowa, ME, Computational solid mechanics | ● 真的很难抉择，请帮我分析一下吧，在线等，急！ | | ● 讨论一下大家research的和和方向巴 | ● 做个ME 找工作情况的统计 | | ● 可否探讨以下Mech在nano领域能有什么作为？ | ● Fracture Mechanics Engineer Position - Columbus, OH | | ● 找工作找工作 | ● 求审稿，Fracture Mechanics, Experimental Mechanics, Biomedical Materials | | ● 给版上找工作的兄弟们打气！！ | ● 求审稿：FEA，Fracture Mechanics, Computational Mechanics (转载) |
|
|
|
|
|
v**t
发帖数: 24 | 1 anyone here studying fracture mechanics? I need you guys' help. In the
literature, The formulation of singular equations for crack problems can be
done in terms of either tractions or resultant forces. Suppose there's a
inclined crack in an infinite plate. The angle between the crack and the
horizon axis is theta. The plate is under remote tension stress in the
vertical direction. Does anyone know how to calculate the resultant forces at
the crack tip?
Thank you | a****g
发帖数: 460 | 2 This is a mix-mode(mode 1 and mode 2) fracture problem.
think about this,the remote applied stress is the only one priciple
stress survived. you can convert it into two components,
one is along the crack line and the other is perpendicular to
the crack line.
If it is a LEFM problem, just apply the superposition law.
at
【在 v**t 的大作中提到】
: anyone here studying fracture mechanics? I need you guys' help. In the
: literature, The formulation of singular equations for crack problems can be
: done in terms of either tractions or resultant forces. Suppose there's a
: inclined crack in an infinite plate. The angle between the crack and the
: horizon axis is theta. The plate is under remote tension stress in the
: vertical direction. Does anyone know how to calculate the resultant forces at
: the crack tip?
: Thank you
| m****n
发帖数: 293 | 3 岛主 is right. But what is the resultant forces at
the crack tip? Do you mean the stresses at the crack
tip?
【在 a****g 的大作中提到】
: This is a mix-mode(mode 1 and mode 2) fracture problem.
: think about this,the remote applied stress is the only one priciple
: stress survived. you can convert it into two components,
: one is along the crack line and the other is perpendicular to
: the crack line.
: If it is a LEFM problem, just apply the superposition law.
:
: at
| v**t
发帖数: 24 | 4 岛主, Thanks for your advice. However, I don't know how to calculate the
resultant forces corresponding to each stress components. Can you show me how?
or can you suggest some books or papers which address the topic?
Mellon: from what I read, it is the resultant forces at the crack tip needed
in the integral equation approach, not the stresses. The equations are derived
by using the complex potentials and treating the crack as a distribution of
dislocations.
Thank you very much
☆─────────────────
【在 m****n 的大作中提到】
: 岛主 is right. But what is the resultant forces at
: the crack tip? Do you mean the stresses at the crack
: tip?
| a****g
发帖数: 460 | 5 Well, I am confused with the problem.
1)why not integrate the stress along the crack tip to get the force?
2)To the best of my knowledge,dislocation relates to plasticity. So do you
consider plastic deformation near the crack tip? If yes, my previous
suggestion
does not work.
how?
derived
【在 v**t 的大作中提到】
: 岛主, Thanks for your advice. However, I don't know how to calculate the
: resultant forces corresponding to each stress components. Can you show me how?
: or can you suggest some books or papers which address the topic?
: Mellon: from what I read, it is the resultant forces at the crack tip needed
: in the integral equation approach, not the stresses. The equations are derived
: by using the complex potentials and treating the crack as a distribution of
: dislocations.
: Thank you very much
:
: ☆─────────────────
| m****n
发帖数: 293 | 6 He just uses the dislocation method with complex variable potential.
And the dislocation is not necessary to be related to plasticity.
I used to work on the interfacial crack by the dislocation method.
If I'm told on which paper you are based to derive your equation,
I may have more suggestions. And I know there is a solution for the
problem, but I forget in which paper it is.
【在 a****g 的大作中提到】
: Well, I am confused with the problem.
: 1)why not integrate the stress along the crack tip to get the force?
: 2)To the best of my knowledge,dislocation relates to plasticity. So do you
: consider plastic deformation near the crack tip? If yes, my previous
: suggestion
: does not work.
:
: how?
: derived
| m****n
发帖数: 293 | 7 He just uses the dislocation method with complex variable potential.
And the dislocation is not necessary to be related to plasticity.
I used to work on the interfacial crack by the dislocation method.
If I'm told on which paper you are based to derive your equation,
I may have more suggestions. And I know there is a solution for the
problem, but I forget in which paper it is.
【在 a****g 的大作中提到】
: Well, I am confused with the problem.
: 1)why not integrate the stress along the crack tip to get the force?
: 2)To the best of my knowledge,dislocation relates to plasticity. So do you
: consider plastic deformation near the crack tip? If yes, my previous
: suggestion
: does not work.
:
: how?
: derived
| x**u
发帖数: 21 | 8 Please send me one. a******[email protected]
Thanks.
【在 m****n 的大作中提到】
: He just uses the dislocation method with complex variable potential.
: And the dislocation is not necessary to be related to plasticity.
: I used to work on the interfacial crack by the dislocation method.
: If I'm told on which paper you are based to derive your equation,
: I may have more suggestions. And I know there is a solution for the
: problem, but I forget in which paper it is.
|
|
|
|
|
|
|
|
