Submitted by qinfhome2006 on Wed, 02/16/2011 - 15:26 Experts, Anyone have experienece of curved cohesive zone model? I just find people just use straight line cohesive zone geometry model. Any difference between these two geometries? Thanks. Forums Fracture Mechanics Forum Vladislav Yastrebov Re: cohesive zone with curvature Hello, May be you can check this article, http://onlinelibrary.wiley.com/doi/10.1002/nme.2651/abstract There is no curvature, the local cohezive interface is bilinear. You can use quadratic elements, i.e. curved interfaces, as well, see http://www.springerlink.com/content/m61xyg1eq9lk7u1k/ Log in or register to post comments Wed, 02/16/2011 - 22:49 Permalink qinfhome2006 Vladislav, Thank you! Vladislav, Thank you! Still have no idea about curved cohesive zone. I'm intending to simulate 2D case in dynamic couple thermal mechanical explicit mode. Log in or register to post comments Thu, 02/17/2011 - 15:27 Permalink Vladislav Yastrebov Why not? In the second Why not? In the second article you can find the reference: "Ortiz and Pandolfi [23] developed a class of three- dimensional cohesive elements consisting of two six-node triangular facets (Fig. 7(a)). The opening displacements are described by quadratic interp- olation within the element. " [23] Ortiz, M., Pandolfi, A. (1999) A class of cohesive elements for the simulation of three-dimensional crack propagation. Int. J. Numer. Meth. Eng. 44, 1267–1282 The method is adapted for explicit simulations. In 2D it is much simpler than in 3D. Log in or register to post comments Thu, 02/17/2011 - 18:13 Permalink Log in or register to post comments5149 views
Vladislav Yastrebov Re: cohesive zone with curvature Hello, May be you can check this article, http://onlinelibrary.wiley.com/doi/10.1002/nme.2651/abstract There is no curvature, the local cohezive interface is bilinear. You can use quadratic elements, i.e. curved interfaces, as well, see http://www.springerlink.com/content/m61xyg1eq9lk7u1k/ Log in or register to post comments Wed, 02/16/2011 - 22:49 Permalink
qinfhome2006 Vladislav, Thank you! Vladislav, Thank you! Still have no idea about curved cohesive zone. I'm intending to simulate 2D case in dynamic couple thermal mechanical explicit mode. Log in or register to post comments Thu, 02/17/2011 - 15:27 Permalink
Vladislav Yastrebov Why not? In the second Why not? In the second article you can find the reference: "Ortiz and Pandolfi [23] developed a class of three- dimensional cohesive elements consisting of two six-node triangular facets (Fig. 7(a)). The opening displacements are described by quadratic interp- olation within the element. " [23] Ortiz, M., Pandolfi, A. (1999) A class of cohesive elements for the simulation of three-dimensional crack propagation. Int. J. Numer. Meth. Eng. 44, 1267–1282 The method is adapted for explicit simulations. In 2D it is much simpler than in 3D. Log in or register to post comments Thu, 02/17/2011 - 18:13 Permalink
Re: cohesive zone with curvature
Hello,
May be you can check this article,
http://onlinelibrary.wiley.com/doi/10.1002/nme.2651/abstract
There is no curvature, the local cohezive interface is bilinear.
You can use quadratic elements, i.e. curved interfaces, as well, see
http://www.springerlink.com/content/m61xyg1eq9lk7u1k/
Vladislav, Thank you!
Vladislav,
Thank you! Still have no idea about curved cohesive zone. I'm intending to simulate 2D case in dynamic couple thermal mechanical explicit mode.
Why not? In the second
Why not? In the second article you can find the reference:
"Ortiz and Pandolfi [23] developed a class of three-
dimensional cohesive elements consisting of two
six-node triangular facets (Fig. 7(a)). The opening
displacements are described by quadratic interp-
olation within the element. "
[23] Ortiz, M., Pandolfi, A. (1999) A class of cohesive
elements for the simulation of three-dimensional
crack propagation. Int. J. Numer. Meth. Eng. 44,
1267–1282
The method is adapted for explicit simulations. In 2D it is much simpler than in 3D.