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    Polymer Classes 2012 

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    Jorgen
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    Published on 2012-01-08 21:53

    The schedule for our 2012 training classes is now available. The classes cover the following topics: polymer mechanics, experimental testing, material model selection, and advanced finite element modeling techniques.
    The next class is on May 8 - 9, 2012. Register now while space is still available.

    Both online (web-based) and in-person (classroom-style) training classes are available. The training classes are targeted to people with an interest in learning the state of the art in testing and analyzing the mechanical performance of parts made from plastics, rubbers, thermosets, or other types of polymers.

    ANSYS 14.0 and PolyUMod 

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    Jorgen
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    Published on 2011-12-15 06:52
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    ANSYS version 14.0 was just released and it seems like it contains a large number of nice improvements. I am also happy to announce that the current version of the PolyUMod library works great also with this new version of ANSYS.

    A new version of the PolyUMod library has also been released. This new version (1.7.6) contains numerous improvements to both the MCalibration software and the PolyUMod library. For example, MCalibration can now calibrate any of the built-in material models in ANSYS Mechanical.
    ...
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    MCalibration: How to calibrate a material model using both DMA and stress-strain data 

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    Jorgen
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    Published on 2011-10-30 20:02

    Here is a tutorial on how to use MCalibration to simultaneously calibrate a material model to both traditional stress-strain data, and dynamic storage modulus (E') and loss modulus data (E''). The attached pdf-file and MCalibration files contain all the details.
    One of the most useful features of MCalibration is the ability to calibrate a material model simultaneously using many different types of experimental data.

    MCalibration Movie Demo 

    by
    Jorgen
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    Published on 2010-09-07 22:25


    I created a short movie that demonstrates the MCalibration software. If you ever need to calibrate a material model for use with Abaqus, ANSYS, or LS-DYNA, then you should check out MCalibration. This software can calibrate all user-material models in the PolyUMod library, and also all built-in material models in Abaqus.
    ...
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    FEA of PLLA Interference Screws 

    by
    Jorgen
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    Published on 2011-08-22 13:55

    I gave a presentation on advanced FE modeling of PLLA intereference screws at the ANSYS User's conference in Boston on Sep 14, 2011. In my presentation I discussed how the design of degradable screws can be optimized for use in Anterior cruciate ligament (ACL) reconstruction surgery. PLLA is a non-linear viscoplastic material that can be accurately modeled using the PolyUMod library.
    2 Comments

    Experimental Data Files for Various Polymers 

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    Jorgen
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    Published on 2010-03-12 19:45

    If you are looking for free, high quality experimental data for various polymers, then you might be interested in learning that you can download and use the experimental data from the following links:
    • ABR
    • Chloroprene Rubber (7 vol% carbon black)
    • Chloroprene Rubber (25 vol% carbon black)
    • Nitrile rubber
    • PTFE
    • Silicone rubber
    • Viton

    Also note that I provide experimental testing services for all kinds of polymers through Veryst Engineering. Send me a private message if you are interested in having your material tested and a suitable material model calibrated.
    8 Comments

    MCalibration: How to activate a failure model 

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    Jorgen
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    Published on 2012-03-01 10:08

    This tutorial shows how to activate a failure model with any of the PolyUMod material models. The attached pdf-file and MCalibration files contain all the details. Using a failure model allows for element deletion in Abaqus/Explicit once a critical stress or strain condition is reached.

    MCalibration: How to calibrate any Abaqus material model 

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    Jorgen
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    Published on 2012-03-01 13:28

    This tutorial illustrates how MCalibration can be used to calibrate any of the built-in material models in Abaqus. The approach is based on the "Abaqus-Template" material model framework that is available in MCalibration.

    Material Modeling of Bread Dough 

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    Jorgen
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    Published on 2010-06-19 21:41
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    Bread dough is quite an interesting material with many similarities in its mechanical response to a lightly crosslinked ...
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  • Recent Forum Posts

    muthismat

    Assigning periodic load and energy

    Hi guys,

    In a project I am involved, I have to perform a failure/fatigue analsys in ABAQUS. So I have a question and need your help:

    In my assignment, I have to give constant pressure and...

    muthismat Today, 01:23 Go to last post
    matsgd

    Here's a suggestion: Print, to a text file,...

    Here's a suggestion:

    Print, to a text file, the stress at some time t+dt, and the six stress vectors corresponding to the perturbed states. Then post them here. Let's take a look at it all.
    Also,...

    matsgd Today, 01:08 Go to last post
    farhan3d

    Natural Rubber Viscoelastic Experimental Data

    Hi All,

    I was wondering if the viscoelastic properties of vulcanized natural rubber are available somewhere. I intend to couple those properties with the basic stress-strain curves for simulation...

    farhan3d Today, 00:44 Go to last post
    farhan3d

    Hi Jorgen, I was able to curve-fit by...

    Hi Jorgen,

    I was able to curve-fit by unchecking the "Use Normalized Error" checkbox in the curve-ftting dialog in ANSYS. I'm not exactly sure what purpose it serves, but the fits are good now.
    ...

    farhan3d Today, 00:40 Go to last post
    Frank

    Try to find publications discussing the...

    Try to find publications discussing the implementation of other 3d SMA models.
    Or post on iMechanica.org

    Frank 2012-05-18, 15:16 Go to last post
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