Elastomers are outstanding in their ability to repeatedly endure large deformations, and they are often applied where fatigue performance is a critical consideration. Because the macromolecular structure of elastomers gives rise to a number of unique behaviors, appropriately specialized methods are needed to characterize, analyze, and design for durability. This 2-day course provides the know-how for engineering durable elastomeric components and systems. The course is taught at Axel Products, and includes live demos of typical behavior.
Instructor: Dr. Will Mars, President of Endurica LLC

For more info, see: http://www.endurica.com/PDF/EngineeringDurableElastomerStructuresv8.pdf

Cost: $2000

http://www.springerlink.com/content/wx185g5301300521/fulltext.pdf

Macroscopic instabilities of fiber reinforced composites undergoing large deformations are studied. Analytical predictions for the onset of instability are determined by application of a new variational estimate for the behavior of hyperelastic composites. The resulting, closed-form expressions, are compared with corresponding predictions of finite element simulations. The simulations are performed with 3-D models of periodic composites with hexagonal unit cell subjected to compression along the fibers as well as to non-aligned compression. Throughout, the analytical predictions for the failures of neo-Hookean and Gent composites are in agreement with the numerical simulations.

It is found that the critical stretch ratio for Gent composites is close to the one determined for neo-Hookean composites with similar volume fractions and contrasts between the phases properties.

During non-aligned compression the fibers rotate and hence, for some loading directions, the compression along the fibers never reaches the level at which loss of stability may occur.

Dear Colleagues:

We would like to invite you to submit an abstract for the upcoming 2011 Annual Technical Meeting of the Society of Engineering Sciences (SES 2011), to be held October 12-14, 2011, at Northwestern University in Evanston, Illinois (http://ses2011.org/).  The area of the minisymposium is "Mechanics of Crystalline and Composite Nanostructures", and we anticipate having a diverse and well-respected group of theoreticians and experimentalists give presentations on this subject.  Abstracts can be submitted by going to the following conference website:

http://ses2011.org/submit_abstracts.php

where our minisymposium is labeled 3.1.  We look forward to seeing you at Northwestern in the fall of 2011!

The word "failure" can mean different things to different people.  Over the past couple of years, my interactions with various groups from industry has shown me that for some people failure means catastropic fracture/buckling while for others it can mean highly localized plastic yielding.  Even for relatively simple sandwich composite structures, there is no clearly agreed upon definition of the word.

Hi all,

Hi all,

I am going simulate a plate of porous material (SiC) to evaluate its strengh.

Would someone share some knowledge on the mechanics of the porous materials.

Thanks.

 /Hao

Early bird registraion is open for the 2010  SCC which will be held May 25 - May 27, 2010 at the Rhode Island Convention Center in Providence, RI, just a short distance from SIMULIA's world headquarters.

There will be more than 80 customer presentations over the course of the 2 1/2 day conference. Advanced Seminars are offered on Monday May 24.

All users of SIMULIA products including Abaqus FEA, Isight, Fiper, and SIMULIA SLM invited to register for the conference.

Learn More at:

http://www.simulia.com/events/conf_10_overview.html

I would like to perform a dynamic structural analysis with ansys. How can I include in the analysis a check after each time step about the status of some elements ( check whether they are broken)  "kill" them if need to and continue the analysis. Thanks, Ran 

Hi all,

2010 SIMULIA Customer Conference (previously the Abaqus Users' Conference)
Call for Abstracts

Let us consider interaction of two atoms/molecules/particles. The reference distance between them corresponds to zero interaction force and zero stored energy. The interaction passes three stages with the increase of the distance. At the first stage the force increases proportionally to the increasing distance: the linear stage. At the second stage the force-distance relationship deviates from the linear proportionality: the nonlinear stage. At the third stage the force drops with the increasing distance: the separation or failure stage.

Tuesday, June 9 – 4:00 PM, EDT

Thursday, June 11 – 9:00 AM EDT

2009 SIMULIA Customer Conference
May 18-21, 2009 • the Brewery, London, England

2009 SIMULIA Customer Conference
May 18-21, 2009 • the Brewery, London, England

The recent issue of Nature Materials includes a review paper on the deformation and failure of protein materials in physiologically extreme conditions and disease. The paper was interesting, so I am posting the abstract here. For the full-paper visit Nature Materials.

Nature Materials 8, 175 - 188 (2009) | doi:10.1038/nmat2387

Deformation and failure of protein materials in physiologically extreme conditions and disease

Markus J. Buehler & Yu Ching Yung

Hi everyone. I'm new to this forum and quite new with FEA.

Currently i'm trying to find compressive strength or maximum failure stress on a modeled brick. Is't possible? What parameters or properties do i need in hand in order to proceed?

Regards,
KenLo

The 2009 Joint ASCE-ASME-SES Conference on Mechanics and Materials, June 24-27, 2009 · Blacksburg, VA

Hi,

 I want to simulate filaure in cement mortar. I am using Rankine criterion for detecting failure. For propagating damage i want to soften element. Here can I suddenly reduce the stiffness of the element to a negligible value as soon as it reaches specified failure criterion. I read in some book about mesh sensitivity in stress based failure criterion but i could not understand.Can some body expalin what is its consequence of suddenly reducing stiffness of element to a negligible value. How mesh will effect.

With Best Regards

Gouse

Can anyone please suggest material for Cohesive Failure Model. I need to know the basic concepts that deals with cohesive failure model. I would also like to know how deltanc, deltatc etc are formulated in this model. Please sugggest.

Hi all,

     Here I encoutered a error in ABAQUS when I include ALE with VUMAT. When ALE was not included with VUMAT, my job can work well while with the combination of VUMAT and ALE, the job cann't work any more due to a "Signal 8" error. And if I use a built-in material model and at the same time ALE, a job can work. Furthermore, element failure is considered in all of the cases.

    Anyone can give some suggetion? Thanks in advance!

Xinke

Here's a puzzle for our readers.  The following image is of the surface of a failed joint followed by a picture of the joint (not the same one but a similar one) before joining.  What material is it? What caused the failure?  All manner of speculation is welcome.