1. An elastoplastic material with strain hardening has the stress strain relationship shown below. The yield point is as a stress of 600 MPa and strain of 0.003 mm/mm. a. If a bar of this material was loaded to a stress of 650 MPa and then released, what would be the permanent strain? b. What would be the percent increase in yield strength gained by the strain hardening for a? c. A second load to a stress of 625 MPa is then applied. How much strain is expected? Is the deformation elastic, plastic, or a combination? Stress, MPa 11 . 1000 800 600 400 200 0 0 0.02 0.04 Strain, m/m 0.06 0.08

1. An elastoplastic material with strain hardening has the stress strain relationship shown below. The yield point is as a stress of 600 MPa and strain of 0.003 mm/mm. a. If a bar of this material was loaded to a stress of 650 MPa and then released, what would be the permanent strain? b. What would be the percent increase in yield strength gained by the strain hardening for a? c. A second load to a stress of 625 MPa is then applied. How much strain is expected? Is the deformation elastic, plastic, or a combination? Stress, MPa 11 . 1000 800 600 400 200 0 0 0.02 0.04 Strain, m/m 0.06 0.08

Materials Science And Engineering Properties

1st Edition

ISBN:9781111988609

Author:Charles Gilmore

Publisher:Charles Gilmore

Chapter6: Introduction To Mechanical Properties

Section: Chapter Questions

Problem 6.5P

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