Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Patent
1986-04-29
1987-01-06
Ciarlante, Anthony V.
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
G01N 1100
Patent
active
046337180
ABSTRACT:
A stress relaxation characteristic of an elastomeric material such as rubber and other elastomers under pressure is established by determining the ratio of the difference between two forces acting on a test sample before and after the test sample is stored under compression, to the force acting on the test sample before the sample is stored under compression. First the sample is subjected to an initial deformation, whereby its initial thickness is reduced by 23-27%. Subsequent deformations then amount to not more than 0.05 mm. In order to achieve these quantitatively very small subsequent deformations, the sample is permitted to expand rather than being subjected to additional compressions. Maintaining the exact magnitude of these subsequent deformations in the form of expansions as well as carrying out accurate force measurements is much simpler than causing additional compressive deformations and measuring the respective forces. Furthermore, in the present apparatus, frictional forces, which would disadvantageously affect the measurement values, are eliminated.
REFERENCES:
patent: 2482147 (1949-09-01), Bashore
patent: 2637203 (1953-05-01), Gehman
patent: 2691886 (1954-10-01), Cole
patent: 2831341 (1958-04-01), Chatten et al.
patent: 3807221 (1974-04-01), Brown et al.
DIN 53,537 (German Industrial Standard Publication), Feb. 1977.
Ciarlante Anthony V.
Fasse W. G.
Kane, Jr. D. H.
Rubber- en Kunststoffabriek ENBI B.V.
LandOfFree
Method and apparatus for determining a stress relaxation charact does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for determining a stress relaxation charact, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for determining a stress relaxation charact will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-675519