{"id":170703,"date":"2023-06-05T07:04:59","date_gmt":"2023-06-05T07:04:59","guid":{"rendered":"\/knowledge\/forums\/topic\/why-isnt-the-stress-strain-response-from-response-function-hyperelastic-model-not-matching-with-the-input-stress-strain-curve\/"},"modified":"2023-07-31T12:33:36","modified_gmt":"2023-07-31T12:33:36","slug":"why-isnt-the-stress-strain-response-from-response-function-hyperelastic-model-not-matching-with-the-input-stress-strain-curve","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/why-isnt-the-stress-strain-response-from-response-function-hyperelastic-model-not-matching-with-the-input-stress-strain-curve\/","title":{"rendered":"Why isn&#8217;t the stress-strain response from response function hyperelastic model not matching with the input stress-strain curve?"},"content":{"rendered":"<p>The experimental data is engineering stress-strain whereas the stresses\/strains calculated by ANSYS are true stress and strain. 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