Integration of ACPD Crack Monitoring into the DREA Instrumented Impact Test System

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Authors
  1. KarisAllen, K.J.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);Facts Engineering Inc, Halifax NS (CAN)
Abstract
A system for generating dynamic J-resistance data has been developed by integrating alternating current potential difference crack monitoring hardware into the DREA Instrumented Impact Test System. Fracture specimens were fabricated from HY80 and precracked to a/W ratios ranging from .475 to .575. Specimens were tested at ambient temperature (20C) using an impact test system. The data provided in the dynamic J-resistance curves indicates that specimens which remain isolated from the drop tower during the impact event produce crack extensions which are in good agreement with the visually measured crack extension taken from the fracture surface.
Keywords
JId;Dynamic fracture;Elastic Plastic Fracture;Dynamic Elastic Plastic Fracture;ACPD Crack Monitoring;Potential Drop Crack Monitoring;Fracture Instrumentation;Drop Tower;Instrumented impact testing;Instrumentation
Report Number
DREA-CR-1999-064 — Contractor Report
Date of publication
01 Apr 1999
Number of Pages
31
DSTKIM No
CA000076
CANDIS No
511647
Format(s):
Hardcopy;Document Image stored on Optical Disk

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