Effect of Strain Rate on Material Properties of Sheet Steels
Publication: Journal of Structural Engineering
Volume 118, Issue 11
Abstract
The effect of strain rate on tensile and compressive mechanical properties of sheet steels is investigated experimentally and analytically. Three sheet steels are studied in both longitudinal and transverse directions under different strain rates and different amounts of prior cold stretching. In order to determine the separate effects of strain rate and aging, half of the cold‐stretched coupons are tested in an average of two days after cold‐stretching operation. The remaining half are tested to failure at least 30 days after cold‐stretching operation. The results show that the proportional limit, yield strength, and ultimate strength increase with increasing strain rate. In general, the amount of increase is found to be: (1) Dependent on the material static yield strength and possibly the ratio, the amounts of prior cold stretching, and/or the strain rates used in the tests; and (2) independent of test directions (longitudinal or transverse), test types (tension or compression), and/or material aging conditions (aged or nonaged). The yield strength is found to be more sensitive to strain rate than the ultimate strength was.
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Published In
Journal of Structural Engineering
Volume 118 • Issue 11 • November 1992
Pages: 3136 - 3150
Copyright
Copyright © 1992 ASCE.
History
Published online: Nov 1, 1992
Published in print: Nov 1992
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