Method and article of manufacture for estimating material failure due to crack formation and growth
US6634236B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 31, 2001 |
| Grant date | Oct 21, 2003 |
| Priority date | — |
| Expiry date | Jan 16, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/02827
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A multiaxial strain cycle (32, 72) is received that is described by a strain tensor that is a function of time. A hyperelastic constitutive model (34, 74) corresponding to the material is received. A fatigue crack growth curve (36, 76) is obtained. A cracking energy density is calculated (50, 90) based on the constitutive model (34, 74) and the multiaxial strain cycle (32, 72). The cracking energy density is a function of material plane (44, 84) and indicates the portion of the total elastic strain energy density that is available to be released on a selected material plane (48, 88). A cracking plane is determined (54, 98) based upon the cracking energy density. A fatigue life is estimated (60, 100) based on the cracking plane and the fatigue crack growth curve (36, 76).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.