Accession Number:

AD0288515

Title:

STRAIN DISTRIBUTION ON NOTCHED PLATE SPECIMENS AT CREEP TEMPERATURES

Descriptive Note:

Corporate Author:

MICHIGAN UNIV ANN ARBOR

Personal Author(s):

• VOORHEES,HOWARD R.
• FREEMAN,JAMES W.

Report Date:

1962-08-01

Pagination or Media Count:

1.0

Abstract:

Resistance strain gages and grids of vapor-deposited metal were evaluated for measuring strains at loading and during creep in plates with edge notches. Foil strain gages mounted with thermal-setting cements remained usable to 0.5 or higher strain at 500 F, but indicated creep was first less than, and later more than, optical-extensometer readings. Indications from gages mounted with ceramic cement drifted 10 mu in.in.hr at 1200 F after several hundred hours at temperature, but agreed with the extensometer to one per cent strain. Qualitative measurements were made during loading K sub t 1.8 and 3.6 and for creep K sub t 1.8 of M-470 alloy at 500 F. Plastic strains were too small to determine by the grid lines used. Author

Descriptors:

• *METALS
• ALUMINUM ALLOYS
• CREEP
• DEFORMATION
• EXTENSOMETERS
• MEASUREMENT
• METAL PLATES
• PHOTOELASTICITY
• RUPTURE
• SHEETS
• STRAIN GAGES
• TEMPERATURE
• TEST EQUIPMENT
• TEST METHODS
• X RAY DIFFRACTION

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE