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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 

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    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

    Frank

    Hello once more a few hints: 1) Regarding...

    Hello

    once more a few hints:

    1) Regarding the factor of 2, check out the equation in the User's Manual, chapter 1.2.2 Conventions:
    Shear strains
    Abaqus always reports shear strain as...

    Frank Today, 07:03 Go to last post
    Frank

    read my previous reply

    You have to replace the NO TENSION and the NO COMPRESSION materials with different elastic-plastic behavior.

    Frank Today, 06:44 Go to last post
    lumpwood

    If you are comfortable with using subroutines it...

    If you are comfortable with using subroutines it would be quite straightforward to write a USDFLD that puts thresholds on load carrying capacity once say a critical principal stress is reached.

    lumpwood Today, 02:54 Go to last post
    ar_chatt

    Further, *NO TENSION and *NO COMPRESSION can...

    Further,
    *NO TENSION and *NO COMPRESSION can carry out the work only if it allows elastic-plastic material behaviour. *NO TENSION and *NO COMPRESSION is restricted to elastic material only, which do...

    ar_chatt Yesterday, 19:22 Go to last post
    ar_chatt

    Thanks for the reply...I triel with seveal...

    Thanks for the reply...I triel with seveal material models available in Abaqus noting seems to have worked. also, I am not concerned with the amount of strain. I am interested in a perfectly...

    ar_chatt Yesterday, 19:19 Go to last post
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