Shear and adiabatic shear failures in an impulsively loaded fully clamped beam

✍ Scribed by Q.M. Li; Norman Jones

• Book ID: 104344246
• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 227 KB
• Volume: 22
• Category: Article
• ISSN: 0734-743X
• DOI: 10.1016/s0734-743x(99)00013-5

✦ Synopsis

An analytical model is proposed for studying the material failure in shear hinges which develop during the dynamic plastic response of beams under impulsive pressure loadings. The structural response outside a shear hinge is modelled using a rigid, perfectly plastic theory. However, within the shear hinge, strain hardening, strain rate and temperature e!ects are considered in order to obtain the conditions for an adiabatic shearing failure. A critical impulsive velocity is obtained for Menkes and Opat's beam problem, which describes a transition from a transverse shear failure mode (Mode III) to an adiabatic shear banding mode with increase of impulse. A similar procedure is used to examine circular plates and cylindrical shells, as well as mass impact problems.