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Bin Liu's picture

Adaptive periodical representative volume element for simulating periodical postbuckling behavior

Finite element method (FEM) with fixed representative volume element (RVE) encounters some difficulties in simulating the periodical postbuckling behaviors of infinite long beam or infinite large film on soft substrate under compression, because the wavelength and pattern of buckling are not known before simulation and will change with the increase of compression strain.

SIF semi-elliptical crack in pipelines

Dear all,

I am working in my under-graduate thesis. Basically, i'm trying to calculate the SIF and J-Integral for semi-elliptical surface crack using CINT command in ANSYS APDL (all of this in a pipeline model). I have seen one paper shows SIF's distribution along the crack front like the following picture (fig. 8):

In my analysis I have obtained the following distribution (I have used a/c=0.5 with a/tc and tc/Rc equal to the fig. 8):

ahmed.hussein's picture

Microstructurally based cross-slip mechanisms and their effects on dislocation microstructure evolution in fcc crystals

Three newly identified cross-slip mechanisms from atomistic simulations of fcc crystals, namely surface, bulk and intersection cross-slip types, were hierarchically informed into discrete dislocation dynamics simulations. The influence of each cross-slip type on the evolution of the dislocation microstructure in face-centered cubic microcrystals having different crystal sizes and initial dislocation densities was investigated.

Smeared Crack and Cohesive zone modeling of concrete in ABAQUS

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Can anybody help me in using smeared crack and cohesive zone modeling in concrete for different grades. I was actually facing problem in using the same to identify fracture parameters of concrete using ABAQUS. I will also be helpful if anyone let me know about an alternate method to find fracture parameters of concrete using ABAQUS apart from using models. Thanks in advance.......

Smeared Crack and Cohesive zone modeling of concrete in ABAQUS

Can anybody help me in using smeared crack and cohesive zone modeling in concrete for different grades. I was actually facing problem in using the same to identify fracture parameters of concrete using ABAQUS. I will also be helpful if anyone let me know about an alternate method to find fracture parameters of concrete using ABAQUS apart from using models. Thanks in advance.......

Shuman_Xia's picture

Optical microscope for three-dimensional surface displacement and shape measurements at the microscale

We report a novel optical microscope for full-field, noncontact measurements of three-dimensional (3D) surface deformation and topography at the microscale. The microscope system is based on a seamless integration of the diffraction-assisted image correlation (DAIC) method with fluorescent microscopy. We experimentally demonstrate the microscope’s capability for 3D measurements with submicrometer spatial resolution and subpixel measurement accuracy.

Buryachenko's picture

New Background of Micromechanics

Dear Colleagues,

One proposes a new background of micromechanics defining a new field of micromechanics called computational analytical micromechanics (CAM, see the abstract attached). It offers opportunities for a fundamental jump in multi-scale and multi-physics modeling of random heterogeneous media with drastically improved accuracy of local field estimations.  I would be happy if you pay your attention to CAM.

Valeriy Buryachenko

Abaqus Problem

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Smeared Crack and Cohesive zone modeling of concrete in ABAQUS

Choose a channel featured in the header of iMechanica: 

Can anybody help me in using smeared crack and cohesive zone modeling in concrete for different grades. I was actually facing problem in using the same to identify fracture parameters of concrete using ABAQUS. I will also be helpful if anyone let me know about an alternate method to find fracture parameters of concrete using ABAQUS apart from using models. Thanks in advance.......

STRESS TRIAXIALITY

Dear ALL,

Which reading material/source that describes the good understanding of stress triaxiality?

What is the role of stress triaxiality for FE analyst?

I have read a lot of papers/articles but still have confusing me on the fundamental of stress triaxiality.

 

Practical Application of the Stochastic Finite Element Method

If you're interested in stochastic finite element analysis, you might like to know that we've just published a paper that reviews the "practical" application of the method. The paper first outlines the main methods of incorporating uncertainty into engineering computations. It then presents "practical" examples across a range of disciplines of where these methods have been used.

We hope that this paper is a good starting point for those looking to adopt stochastics in their work.

Error 5 and error 193

Hello all

I am running simulations in Abaqus. Some strange errors are coming like error code 193 and error code 5.

1. Error code 193- After job is aborted, when I open Monitor Abaqus exited with error code 193. I am not getting the meaning of this, even message file is also not genwrated.

Arash_Yavari's picture

On the stress singularities generated by anisotropic eigenstrains and the hydrostatic stress due to annular inhomogeneities

The problems of singularity formation and hydrostatic stress created by an inhomogeneity with eigenstrain in an incompressible isotropic hyperelastic material are considered. For both a spherical ball and a cylindrical bar with a radially-symmetric distribution of finite possibly anisotropic eigenstrains, we show that the anisotropy of these eigenstrains at the center (the center of the sphere or the axis of the cylinder) controls the stress singularity.

Concrete Computational Mechanics PhD position Rensselaer Polytechnic Institute

This is an announcement about a vacant PhD Research/Teaching Assistant position in RPI, Troy, NY in the department of Civil and Environmental Engineering in the field of Concrete computational mechanics.

The research involves:

Zartasha Mustansar's picture

Reducing mesh size in Abaqus

 Can anyone suggest a way to reduce the mesh size within Abaqus using the odb(database) file ?

kashif355's picture

Crack identification

<p>I am working on crack identification in RC bridge girder.&nbsp;</p>
<p>Can anyone tell me about " what is ment by insurmountable convergence failure"</p>
<p>&nbsp;</p>

Arash_Yavari's picture

Geometric nonlinear thermoelasticity and the time evolution of thermal stresses

In this paper we formulate a geometric theory of nonlinear thermoelasticity that can be used to calculate the time evolution of the temperature and thermal stress fields in a nonlinear elastic body. In particular, this formulation can be used to calculate residual thermal stresses. In this theory the material manifold (natural stress-free configuration of the body) is a Riemannian manifold with a temperature-dependent metric. Evolution of the geometry of the material manifold is governed by a generalized heat equation.

Excessive element distortion under high indentation depth

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Dear everyone,

 

  I am new to Abaqus and I have been struggling for the past 3 months about this issues I am facing on my modelling...

 

Excessive element distortion under high indentation depth

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Dear everyone,

 

  I am new to Abaqus and I have been struggling for the past 3 months about this issues I am facing on my modelling...

 

Abolhasan Giashi's picture

Rubber Adhesion Behaviour

Dear everyone

My project is about the adhesional friction between rubber and a rigid surface. In this case I have modeled a block of rubber which is sliding on a real rough rigid surface in ABAQUS.

Abolhasan Giashi's picture

Rubber Adhesion Behaviour

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Dear everyone

 

My project is about the adhesional friction between rubber and a rigid surface. In this case I have modeled a block of rubber which is sliding on a real rough rigid surface in ABAQUS.

 

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