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 Fu/Fy 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 © ASCE.


Civil, Architectural and Environmental Engineering

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Article - Journal

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Publication Date

01 Jan 1992