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  1. TheHumbleStudent

    properties at elevated temperatures

    I'm looking for temperature dependent properties of several alloys, but surprisingly I'm having the most difficult time with nnealed 1018 steel. I've checked ASM Handbook and MMPDS-07 and have found basic data for ambient temp but not elevated. young's modulus yield strength tensile strength...
  2. TheHumbleStudent

    Modeling Plasticity - Tabulating Plastic Stress / Strain from Empirical Data

    I appreciate the responses. If the test was load controlled, the strain rate would accelerate when the stiffness begins to decrease in order to maintain or increase load(?). If so, it becomes a matter of different strain rates exhibiting different stiffnesses. Someone please confirm my...
  3. TheHumbleStudent

    Modeling Plasticity - Tabulating Plastic Stress / Strain from Empirical Data

    Dispacement
  4. TheHumbleStudent

    Modeling Plasticity - Tabulating Plastic Stress / Strain from Empirical Data

    I've looked into this and the data does in fact follow trends I've found elsewhere. The best explanation I've read is that, under load, polymer chains stretch, rotate, slide, and disentangle to cause permanent deformation. Initially the chains may be highly tangled and intertwined but when the...
  5. TheHumbleStudent

    Modeling Plasticity - Tabulating Plastic Stress / Strain from Empirical Data

    Attached is a true stress / true strain plot of polycarbonate at some elevated temperature. The true stress / strain was calculated using the engineering stress / strain data and the measured Poisson's ratio. I'm curious how members of this forum would tabulate plastic stress / strain data...
  6. TheHumbleStudent

    stress convergence in areas of plastic strain

    Can you explain why ? Not disagreeing just want to know. Thanks.
  7. TheHumbleStudent

    stress convergence in areas of plastic strain

    Newbie here in the realm of stress analysis... Is it valid to seek stress convergence in areas where plastic deformation is occurring? If so, are there any good guideline documents that anyone can point to?
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