Multi-axial strain testing apparatus
AssigneeHankock Tire Mfg. Co., LTD.
InventorsGary L. Day, Michael Carroll, Neal G. Sehm
Life of this patent
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Abstract
A strain testing apparatus which places tensile forces on a sheet, a film, or the like samples in at least two axes and generally in a radial direction. The multi-axial strain testing apparatus comprises a clamping assembly having at least two clamping members, and a sample securing portion arranged in a substantially radial manner about a point. The multi-axial strain testing apparatus can advantageously be employed to test crack growth propagation and flex fatigue in rubber polymer and elastomer samples.
Claims19
A multi-axial testing apparatus, adapted to apply multi-axial forces to a sample, comprising:
- at least two clamping members for imposing dynamic, substantially radial forces on a sample, each said clamping member comprising a sample securing element which are arranged in a substantially radial manner about a point;
- a transfer rod pivotally connected at one end to said clamping member;
- and
- a drive assembly adapted to cause cycling of said sample, said drive assembly operatively connected to said transfer rod, wherein when said drive assembly is activated each of said clamping members individually, dynamically reciprocate in a predetermined pattern.
A multi-axial testing apparatus, comprising:
- a clamping assembly for placing predetermined dynamic, cyclical tensile forces on a sample in a substantially radial direction, said clamping assembly comprising at least three clamping members, said clamping members each having a sample securing portion for securing a sample to said clamping member, said sample securing portion arranged in a substantially radial manner about a point, wherein each of said clamping members individually, dynamically reciprocate in a predetermined pattern when activated by a drive assembly operatively connected to said clamping assembly through a transfer assembly.
Dependencies are inferred from the claim text.