Shear Localization and Failure in Shocked Metals Final Report

Garaizar, F X ; Trebotich, D P ; McNaney, J M ; Kumar, M ; Stolken, J S ; Campbell, G H

Lawrence Livermore National Laboratory

关键词: Velocity;    Deformation;    36 Materials Science;    Mechanical Properties;    Shear;   

DOI  :  10.2172/15013902
RP-ID  :  UCRL-TR-202399
RP-ID  :  W-7405-ENG-48
RP-ID  :  15013902

美国|英语

来源: UNT Digital Library

【 摘 要 】

The goal of the project was to understand the effect of shocks on the subsequent mechanical response of metals. The framework revolves around the sequence and timing of events during shock loading. A shock will transmit through a solid at speed of several mm per {micro}s. The result of the shock passage is a step change in the velocity of the material. This subsequent velocity will cause deformation in the material that could extend in time to several 10s or 100s of {micro}s after the passage of the shock. How the material responds in this timeframe after shock passage is intimately related to its mechanical properties. The mechanical properties of interest are the stress-strain response, the susceptibility to localization, and the failure process. In short, the shock passes through a material first before it has time to move, however it does send the material into motion that causes mechanical deformation and usually some sort of failure.