Plasticity
Modellilng Deep and shallow foundations in Abaqus
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Dear All,
I decided to put this post since I am trying to model piles on granular materials with Abaqus and I am having LOADS of problems, some of them due to my lack of understanding in the subject and others becasue there is not enough information around. Some of my problems are:
1- convergence problems: I am using Mohr coulomb for the soil and elasticity for the pile. If the difference between Young's modulus for both materials is to big it does not converge on Abaqus Static. If I do not put a bit of cohesion in my soil it also does not converge.
PhD positions in Computational Mechanics
We are looking for suitable candidates for a PhD research work in Computational Mechanics and numerical simulation, to be carried out at the Department of Mechanical Engineering, University of Aveiro, Portugal, in one of the following areas:
- development of new finite elements for metal forming applications;
- numerical simulation of metal forming (sheet and bulk forming);
- tubular hydroforming numerical simulation;
- structural stability and buckling analysis of reinforced aircraft panels;
Survey on XFEM: is XFEM good at characterizing Failure rather than Fracture?
Would like to hear your expertise/user/non-expert/sceptic comments on XFEM. Here are some of the challenges. Would like to hear your relections.
1. Can XFEM be utilized in characterizing Failure rather than Fracture?
2. What sort of challenges XFEM still have with respect to Fracture Mechanics?
3. How the Fracture mechanics benefit the industry, from the perspective of strcutural integrity?
4. Failue investigations vs. Fracture investigations: benefit to industry?
5. Academist vs Engineer: Perspective on XFEM
notch tip radius
Hello everyone,
I am looking for a way to measure notch tip radius experimentally. Would you give me some ideas about that? is there any relationship between morphology of notched cracked body surface and notch tip radius?
Thank you and Regards,
Dynamic simulations with nonlinear material into Explicit
Hi all,
I am new in the Forum, and I am looking for some informations regarding how to simulate nonlinear material in explicit.
I am tryng to analyse the behaviour of a roller rolling on the sand (or mud), but the results I get with a basic elasto-plastic material are not very accurate, expecially because I cannot set the tension allowed in the sand to be zero.
Other ways to input nonlinearity in Explicit are always refused by ABAQUS. Is there any way to get something more accurate?
ABAQUS (6.8, 6.9 EF) - Effect of the number of back stresses
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Since ABAQUS 6.8, a new feature has been added to the combined hardening
material input.
Let's assume a combined Kinematic and Isotropic hardening case, such as
those happen in metals.
"Half cycle" uni-axial test results has been utilized to model the yield
stress-plastic strain behavior as well as the Kinematic behavior of the
metals.
In the same user interface, there is an option to choose the number of
back stresses.
Is the number of 1 back stress is equivalen to the case of linear
kinematic hardening (Ziegler's)?
ABAQUS (6.8, 6.9 EF) - Effect of the number of back stresses
Since ABAQUS 6.8, a new feature has been added to the combined hardening material input.
Let's assume a combined Kinematic and Isotropic hardening case, such as those happen in metals.
"Half cycle" uni-axial test results has been utilized to model the yield stress-plastic strain behavior as well as the Kinematic behavior of the metals.
In the same user interface, there is an option to choose the number of back stresses.
Is the number of 1 back stress is equivalen to the case of linear kinematic hardening (Ziegler's)?
Postdoctoral Fellowship for Research into the Mechanics of Magnesium Alloys
A postdoctoral fellow is sought to study the mechanics of magnesium alloys at the University of Waterloo, Canada, under the guidance of Dr. Worswick and Dr. Gracie. The qualified applicant will have a proven background in computational mechanics, substantiated by publications in international journals. Preference will be given to candidates with experience coding large deformation plasticity models, coding the finite element method and with using fracture mechanics. In addition, experience with high strain rate testing of materials is desirable.