Apparatus for the compressive testing of testpieces for interlaminar shear tests and processes for the shear testing of testpieces, particularly curved testpieces
US5280730A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 5, 1992 |
| Grant date | Jan 25, 1994 |
| Priority date | — |
| Expiry date | Mar 5, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2203/0435
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus for testing testpieces (11) in the form of small plates, in which the testpiece is grasped between two pairs of jaws (12,13), which can be moved together. The jaws (12,13) are mounted on the platens (1,4) without hyperstaticity, which reduces the risks of introducing parasitic forces. The testpiece can be notched in such a way that its median portion is exposed to shear. The jaws then have adequate lengths to cover the principal faces of the testpiece (11) virtually up to the notches. The shear field is at a maximum and quasi-uniform in the median surface between the notches. This invention is useful for characterizing the interlaminar shear of plates made from composite materials and includes curved testpieces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.