Accession Number : ADA258826
Title : Notch Dimensions for Three-Point Bend Fracture Specimens Based on Compliance Analyses
Descriptive Note : Final rept.
Corporate Author : ARMY RESEARCH LAB WATERTOWN MA MATERIALS DIRECTORATE
Personal Author(s) : Baratta, Francis I ; Underwood, John H
Report Date : Dec 1992
Pagination or Media Count : 11
Abstract : Load-line compliance was calculated for various three-point bend specimens containing finite width notches and cutouts, using methods of engineering strength of materials and elastic superposition. Comparison of compliance results for notched specimens with results for the ideal zero width crack was used to propose two basic notch configurations for fracture testing. A relatively wide notch that could be produced by-conventional manufacturing methods resulted in load-line compliance values 10% or more above those of the ideal crack case. A narrow notch that could be produced by electric-discharge machining resulted in compliance values much closer to those of the ideal crack case.
Descriptors : *NOTCH TOUGHNESS , REPRINTS , MANUFACTURING , MACHINING , MATERIALS , COMPARISON , CRACKS , TOUGHNESS , BENDING , ENGINEERING , CONFIGURATIONS , ELECTRIC DISCHARGES
Subject Categories : Mechanics
Distribution Statement : APPROVED FOR PUBLIC RELEASE