Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Patent
1996-03-01
1998-01-06
Chilcot, Richard
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
73845, 73827, G01N 324
Patent
active
057057524
ABSTRACT:
A back-to-back, single lap-joint test fixture and method provides for uniform shear strength determination in a lap-joint area at an adhesive bond plane between a low-modulus rubber-like elastic material substrate and a stiff panel both defining a single lap-joint specimen, two of which are disposed back-to-back with the rubber substrates being constrained from lateral deformation by respective aluminum housings each having a load-transferring lip pushing upon a substrate also being pulled by load transferring dowel pins pulling upon the rubber substrate while with a restraining clamp that restrains transverse movement of the housing and rubber substrate all so as to produce only shear-type failures based on the near-incompressible nature of the rubber materials in the two back-to-back single lap-joint specimens.
REFERENCES:
patent: 3566681 (1971-03-01), Isoipescu et al.
patent: 4346609 (1982-08-01), Gould et al.
patent: 4957004 (1990-09-01), McKinlay
patent: 5176028 (1993-01-01), Humphrey
"Standard Test Method for Strength Properties of Adhesives in Shear by Tension Loading of Laminated Assemblies" Annual Book of ASTM Standards, ASTM D3165-91, vol. 15.06, pp. 205-208, 1995.
"Standard Test Method for Strength Properties of Double Lap Shear Adhesives Joints by Tension Loading" Annual Book of ASTM Standards, ASTM D3528-92, vol. 15.06, pp. 24-243, 1995.
"Stress Distribution of a Lap-Joint Under Tension-Shear", D.J. Chang and R. Muki International Journal of Solids and Structures, vol. 10, pp. 503-517, 1974.
Chang Dick J.
Hanna William D.
Chilcot Richard
Noori Max H.
Reid Derrick Michael
The Aerospace Corporation
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