Civil Engineering Study 89-4
INTRODUCTION Since May 1988, the research project on automotive components sponsored by American Iron and Steel Institute (AISI) at University of Missouri-Rolla (UMR) has been concentrated on a study of the effect of strain rate on mechanical properties of sheet steels and the structural behavior and strength of cold-formed steel members subject to impact loads. The results of the tensile dynamic mechanical properties of three selected sheet steels, in the virgin condition as well as for the steels subjected to different amount of cold stretchings, were estabiished in 1988 and early 1989. Details of the tension coupon tests were presented in the Eleventh Progress Report 1. During the past few months, the UMR study primarily involved the experimental determination of the dynamic mechanical properties in compression for the same sheet steels used in the Eleventh Progress Report. The strain rates used for these compression coupon tests were similar to those used for the tension tests. They ranged from 10-4 to 1.0 in./in./sec. Details of the compression coupon tests are discussed herein. This phase of study began with a review of the available literature relating to the efffect of the strain rate on the mechanical properties of sheet steels in compression. The literature survey is summarized in Section II. Section III presents the detailed information obtained from 54 compression tests. This section also discusses the strain rate effects on the compressive mechanical properties of the sheet steels tested. In addition to the compression coupon tests, the test data presented in the Eleventh Progress Report for tension coupons tests have been reevaluated for the purpose of predicting the tensile dynamic mechanical properties under high strain rates. The newly developed equations and the corresponding graphical presentations are given in Section IV. Finally, all the research findings are summarized in Section V.
Civil, Architectural and Environmental Engineering
American Iron and Steel Institute
Wei-Wen Yu Center for Cold-Formed Steel Structures
Missouri University of Science and Technology
01 Aug 1989
© 1989 Missouri University of Science and Technology, All rights reserved.
Kassar, Maher and Yu, Wei-wen, "Design of automotive structural components using high strength sheet steels the effect of strain rate on compressive mechanical properties of sheet steels" (1989). CCFSS Library (1939 - present). 39.