The Research of Strain Rate of Common Bolt Materials
In this article, quasi-static tensile and dynamic tensile tests of three common bolt materials (three kinds of steels) were conducted, and their stress-strain curves at various strain rates were obtained. By this means, the mechanical properties of three common bolt materials were analyzed. Based on the John-Cook model, author established the constitutive relation models of three materials which could describe their strain rate dependence, and used these models in the numerical simulation. The research show us that bolt material strain rate effect not only could affect the bolt impact strength, but also could not be ignored in the study of impact strength of equipments connected by bolts. The research has great significance to the study of impact resistance strength of equipments and bolts.
Chunliang Zhang and Paul P. Lin
X. H. Gao et al., "The Research of Strain Rate of Common Bolt Materials", Applied Mechanics and Materials, Vols. 226-228, pp. 613-616, 2012