A New Fracture Toughness Test Method for Thick-Walled Cylinder Material.

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Abstract:

A new method for measuring the plane strain fracture toughness of the material from a thick-walled cylinder is presented. This method utilizes a notched, C shaped test specimen, pin loaded in tension. This specimen has the advantage of most efficiently utilizing the available material to obtain the maximum possible triaxial constraint at the crack tip. Stress intensity factor calibrations for this specimen were obtained by two independent experiments. These are a compliance test as originally proposed by Irwin and a fatigue crack growth test as suggested by James and Anderson. Very good agreement was obtained between the results of these two experiments. A stress intensity calibration for a similar geometry was also obtained using a finite element analysis and a method developed by Kobayashi to determine stress intensity factors from finite element results. The results of this method appear to be low by about 10 percent. Author

Author(s):
Kendall, David P. ; Hussain, Moayyed A.
Author Organization(s):
WATERVLIET ARSENAL N Y
Descriptive Note:
Technical rept.,
Pagination:
0031

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
WVT-7122
Project Number(s):
DA-1-T-061101-A-91-A
 Subject Terms
Communities of Interest:
Air Platforms
Descriptor(s):
(*FRACTURE(MECHANICS), *TEST METHODS), (*GUN BARRELS, STEEL), NOTCH TOUGHNESS, STRESSES, NUMERICAL ANALYSIS, MECHANICAL PROPERTIES, CRACK PROPAGATION, CYLINDRICAL BODIES
Field(s)/Group(s):
Metallurgy and Metallography, Mechanics
Keyword(s):
FINITE ELEMENT ANALYSIS, *FRACTURE(MECHANICS), *TOUGHNESS, STRESSES
Report Date:
1971 Apr 01