Method and apparatus for performing dynamic mechanical analyses
US6880385B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2003 |
| Grant date | Apr 19, 2005 |
| Priority date | — |
| Expiry date | Apr 2, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2203/0226
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a dynamic mechanical analysis, a test specimen is coupled to an excitation device by a holder device. An excitation force made up of a static pre-tensioning force component and a time-variable force component is applied to the test specimen, and a deformation of the test specimen is measured by one or more displacement sensors. In a test phase an excitation force is applied to the test specimen, while at least one decision parameter is determined. The decision parameter is indicative of a degree of slack in the coupling of the test specimen. Based on the comparison between the decision parameter and at least one reference value it is determined whether or not the test specimen is coupled to the excitation device in a completely slack-free state, so that any measured physical values will not be subjected to errors caused by an insufficient amount of the pre-tensioning force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.