Hi all,
I 'd like to ask whether anyone has applied XFEM for a user-material (UMAT). What is the process to do that? Could anyone provide some advice, documentation or guidelines?
All the best,
Panos
p.s. I 've heard that a UEL code is needed to couple XFEM with UMAT.
I want to share our recent research work on FCC metallic nanowires, which is published in Journal of Physical Chemistry - C (ACS Publications). The abstract of the paper is given below. Further details can be found at " Sutrakar et al J. Phys. Chem. C, 2011, 115 (21), pp 10394–10398
Dear friend:
As known to all, the magnitude of the stress/strain at the crack tip is mathematically infinite,while it is physically finite. So,what i am concerned is how to caculate the value of the stress/strain at the tip.What's more, i doubt that whether the CTOD is constant during the propogation process.if yes.so can i take a constant range of the limited stress/strain near the crack tip? If there is any reply ,i will be appreciated!
The response of structural materials to external mechanical load may strongly depend on the rate at which the load is imposed. For example, a specimen may exhibit ductile fracture if loaded at quasi-static rate (strain rate below 1.0/s), but may show brittle fracture under impact (high-rate) loading. According to the classic monograph of Professor Marc Meyers, if the strain rate is above 100/s, it can be put into the high-strain rate regime. The mechanical behavior of structural materials under such loading conditions is dubbed dynamic.
Dear friends,
I am writing an XFEM code for dynamic crack propagation and interested in using the Interaction Integral method (as in Rethore et al. (2005)) for computation of Stress Intensity Factors (SIFs). I wonder if anyone knows what kind of dynamic asymptotic crack tip auxiliary fields could be applied to the method for computation of SIFs for a dynamically propagating crack.
Regards
Matin
I am doing ph.d work related to powder mettalurgy
I want to simulate the compaction process ( in powder mettalurgy) by using ABAQUS.It is very essential to find a way to create a model which will behave as such as PM part.
After modeling it is next work to find the proper analysis method to do analysis by applying compressive load to study the deformation of the PM Part. In ABAQUS, Modified Drucker-Prager cap model is widely used for the compaction problems of different metals in many research papers.
I have 2 problems.
Dear Colleagues,
I wish to bring to your attention my recent work with Liping Liu on "A homogenization analysis of the field theoretic approach to the quasi-continuum method" to appear in the Journal of the Mechanics and Physics of Solids. Below is the abstract and attached is the preprint of the article. I will very much appreciate your comments and suggestions.
A Homogenization Analysis of the Field Theoretic Approach to the Quasi-Continuum Method
By: Payam Soltani; P. Bahar & A. Farshidianfar
By: Payam Soltani, M. M. Taherian, A. Farshidianfar
http://iopscience.iop.org/0022-3727/43/42/425401
In this study, for the first time, the transverse vibrational model of a viscous-fluid-conveying
single-walled carbon nanotube (SWCNT) embedded in biological soft tissue is developed.
Nonlocal Euler–Bernoulli beam theory has been used to investigate fluid-induced vibration of
