Method for measuring dynamic stress field evolution law of complex heterogeneous structure
US10648894B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2018 |
| Grant date | May 12, 2020 |
| Priority date | — |
| Expiry date | Mar 23, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30132
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for measuring the dynamic stress field evolution law of a complex heterogeneous structure, comprising: preparing a transparent photosensitive resin model of a complex heterogeneous structure by means of three-dimensional (3D) printing technology to serve as a test piece (S101); placing the test piece in a light path of a circularly polarized light dark field, performing continuous stress loading on the test piece, and recording images (S102); acquiring a plurality of continuously changing full-field stress fringe grayscale images according to videos generated by the image recording (S103); then acquiring grayscale value change sequences of pixel points at each position in the images (S104); and finally, calculating full-field fringe orders under continuous loading conditions according to the relation between the grayscale values and the fringe orders so as to calculate full-field stress values under the continuous loading conditions (S105). Thus, it is possible to extract and quantify the global dynamic stress field evolution law of a complex heterogeneous structure subjected to high exterior load under fixed light field conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.