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Material Properties

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  3. With regards to Multilinear Kinematic Hardening, Section 4.4.3.2.2 states “No segment slope can be larger than the slope of the previous segment.” However, it appears to run without error. What is the reason for this note if the solver runs anyway?

With regards to Multilinear Kinematic Hardening, Section 4.4.3.2.2 states “No segment slope can be larger than the slope of the previous segment.” However, it appears to run without error. What is the reason for this note if the solver runs anyway?

Tagged: 2019 R1, materials, mechanical-apdl, plasticity, structural-mechanics
    • March 17, 2023 at 9:00 am
      FAQFAQ
      Participant

      An increasing KINH slope segment is generally not recommended as it might lead to negative volume fractions for the different KINH layers and if slope increase is large enough, it might not be physically realistic. Hence, the doc note. Starting at R2019-R2, a warning is issued: “The TB,PLAS,,,KINH table for material # at temperature ## has a segment slope (***) larger than the previous segment slope (**). ” Background: The older formulation (TB,mkin) error trapped this and the solver would not proceed. This trap was considered too restrictive as it did not accommodate minor “noise” in some user’s data that turned out to be tolerable.

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