In order to take into account the local material non-linear elastic-plastic effects generated by notches, Glinka proposed the equivalent strain energy density (ESED) Criterion which has been widely accepted and used in fatigue theory and calculation for the last few decades. In this paper, Glinka's criterion is applied to structural optimization design for elastic-plastic correction to consider material non-linear elastic-plastic effects. The equivalent (fictitious) stress was derived from Glinka's Criterion equation for the commonly used Ramberg-Osgood and bi-linear stress and strain relationships. This equivalent stress can be used as the stress boundary constraint threshold in structural optimization design to control the elastic-plastic stress or strain in nonlinear optimization. Examples demonstrated this application was an efficient and effective practice within the material non-linear elastic-plastic range when using the equivalent elastic stress as constraints in automotive engineering structural optimization designs.


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    Title :

    Application of the Glinka's ESED Criterion in Optimization Design


    Additional title:

    Sae Technical Papers


    Contributors:
    Zweng, Fred (author) / Datta, Sandip (author) / Qin, Wenxin (author)

    Conference:

    SAE 2014 World Congress & Exhibition ; 2014



    Publication date :

    2014-04-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English