Subject: Re: Penalty stiffness for contact - msg#00113

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crack analysis

hi guyz!!! i am doing crack analysis. i would like to know is it possible in abaqus to define crack like one can in Ansys. In ansys we can create a common node for crack tip. can we define crack using only one part Or we have to define crack using *tie constraint between two parts only? (i am not doing crack propagation so i want the bonded surfaces to be bonded throughout the analysis.) And how to ensure the compatibility of the mesh across the bonded interfaces in 3d analysis since we can define the seeds only along the edge not on surface?... ur help is highly appreciated thanks n regards ninad.

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Re: line load

Don't u think it would be better represntation if u apply loading by contact ? (just like u do while testing ?), rather than applying load ?, since u are modeling full 3D model for 4 pt bending test, which I did model them by contact (roller or loading plane and support), it works pretty well indeed. No assumption, just precise modeling of test condition.. Just a thought. Thanks ! -- Junghyun Ahn --- In ABAQUS@xxxxxxxxxxxxxxx, "Ninad Karkamkar" <ninad.karkamkar@xxxx > wrote: > Hi ! > I am analyzing 4 point bend fracture specimen in 3D. I want to apply > line load (as a bending moment) on the beam. Is it possible to apply > such load across the width on a line?...because the line load option > given in abaqus, seems to be applicable only with wire sections not > solid sections. Right now I am applying the load by dividing the line > into number of small lines n then applying the concentrated force at > each keypoint. Is it possible to apply load on nodes in abaqus like > ansys?... > > thanks > > ninad.

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Penalty stiffness for contact

Hi everybody, Does anyone know which is the penalty stiffness used by Abaqus 6.4.1 to enforce contact with the augmented lagrange algorith?m. I have not been able to locate it in the manual thanks jose José F. Rodríguez Investigador Ramón y Cajal Area de Mecánica de Medios Continuos y Teoría de Estructuras Departamento de Ingeniería Mecánica Centro Politécnico Superior. Universidad de Zaragoza C/ María de Luna 3, Ed. Agustín de Betancourt 50018 Zaragoza Tel: 976.761000 ext.5230 / Fax: 976.762578 e-mail: jfrodrig@xxxxxxxxx

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Element deletion in VUMAT

hi all, I am using the subroutine VUMAT to model a particular material and am using a failure criterion with it for element deletion. I use the delete option on the *DEPVAR keyword to delete the elements. However the problem is that while the stresses in the element which has been deleted become zero (which is the purpose of the deletion) the element itself collapses and causes the analysis to stop. That is to say that even after deletion the element is being considered in the analysis. Could you please tell me a way to get around this problem? Thanks, Shashank