Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Patent
1981-01-05
1982-11-16
Myracle, Jerry W.
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
73818, G01N 308
Patent
active
043589618
ABSTRACT:
A tubular piece part (10) is tested to determine the rupture strength of the part when subject to lateral expansion (F) with respect to a bore (11) of the part. In one example, a tubular segmented collet (21) is placed in the bore of the part, and a tapered pin (23) is forced a predetermined distance into the collet (X) so as to expand the collet and part radially outward by a predetermined amount. The peak force required to so expand the collet is measured (57) so as to provide an indication of the rupture strength of the part, and particularly of the weld strength of a molded plastic tube having a radial weld line (W). In particular, this method provides an indication of the likelihood that the part will fail prematurely in the field, after subsequent assembly of the part with an insert member (17) that is force fit into the bore.
REFERENCES:
patent: 3690141 (1972-09-01), Brownbill
patent: 3992928 (1976-11-01), Thoms
patent: 4047425 (1977-09-01), Handy et al.
patent: 4122704 (1978-10-01), Lutenegger et al.
patent: 4300397 (1981-11-01), Kempen
Kip, Jr. R. F.
Landis J. L.
Myracle Jerry W.
Western Electric Company Inc.
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