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Evaluation of yield criteria for forming simulations based on residual stress measurement

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Abstract

Process induced anisotropy in sheet metal is accounted for in analytical modeling by anisotropic yield criteria. The suitability of a yield criterion for predicting sheet metal forming process is generally validated by way of its ability to predict surface strains. However, the sensitivity of surface strains to yield criteria is dependent upon strain modes, with plane strain mode exhibiting higher sensitivity. To eliminate dependency on strain modes, stresses are used to evaluate yield criteria, since forming stresses are less sensitive to strain modes. In the study, the residual stresses remaining in a hemispherical cup formed in plain strain mode is predicted using Hill48 and Barlat89 criteria. The residual stresses are experimentally characterized by using X-Ray diffraction method. Suitable yield criterion for forming simulation is validated based on the correlation of theoretical predictions with experimental residual stress values.

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Acknowledgements

Authors would like to thank Dr.Balachandran of Advanced Engineering, Ashok Leyland for his suggestions and comments during the exercise and manuscript preparation.

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Authors and Affiliations

  1. Advanced Engineering, Ashok Leyland Ltd., Chennai, 600 103, India

    K. Hariharan & Mangalaramanan Sathya Prasad

  2. Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai, 600 036, India

    Raghu V. Prakash

  3. Defence Materials Research Laboratory, Hyderabad, 500 058, India

    G. Madhusudhan Reddy

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  1. K. Hariharan
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  2. Raghu V. Prakash
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  3. Mangalaramanan Sathya Prasad
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  4. G. Madhusudhan Reddy
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Correspondence to K. Hariharan.

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Hariharan, K., Prakash, R.V., Sathya Prasad, M. et al. Evaluation of yield criteria for forming simulations based on residual stress measurement. Int J Mater Form 3, 291–297 (2010). https://doi.org/10.1007/s12289-010-0984-9

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  • DOI: https://doi.org/10.1007/s12289-010-0984-9

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