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Williams expansion-based approximation of the stress field in an Al 2024 body with a crack from optical measurements
- Source :
- Frattura ed Integrità Strutturale, Vol 11, Iss 41, Pp 323-331 (2017), Frattura ed Integrità Strutturale, Vol 11, Iss 41 (2017), Frattura ed Integrità Strutturale; Vol 11 No 41 (2017): July 2017; Pages 323-331, Frattura ed Integrità Strutturale; V. 11 N. 41 (2017): July 2017; Pages 323-331, Frattura ed Integrita Strutturale. 2017, vol. 11, issue 41, p. 323-331.
- Publication Year :
- 2017
- Publisher :
- Gruppo Italiano Frattura, 2017.
-
Abstract
- A study on the approximation of the stress field in the vicinity of crack tip in a compact tension specimen made from Al 2024-T351 is presented. Crack tip stress tensor components are expressed using the linear elastic fracture mechanics (LEFM) theory in this work, more precisely via its multi-parameter formulation, i.e. by Williams power series (WPS). Determination of coefficients of terms of this series is performed using a least squares-based regression technique known as over deterministic method (ODM) for which displacements data obtained experimentally via optical measurements are taken as inputs. The stress fields reconstructed based on the displacement data obtained experimentally by means of optical measurements are verified by means of the stress field approximations derived for the normalized CT specimen via hybrid elements.
- Subjects :
- Power series
Crack tip fields
Materials science
Multi-parameter approximation
lcsh:Mechanical engineering and machinery
lcsh:TA630-695
Least squares
Optical measurements
Stress (mechanics)
DIC
Higher-order terms
lcsh:TJ1-1570
Williams power series
Compact tension specimen
Stress intensity factor
Cauchy stress tensor
business.industry
Mechanical Engineering
Mathematical analysis
Crack tip opening displacement
Structural engineering
lcsh:Structural engineering (General)
Physics::Classical Physics
Stress field
Mechanics of Materials
Stress field reconstruction
business
Subjects
Details
- Language :
- English
- ISSN :
- 19718993
- Volume :
- 11
- Issue :
- 41
- Database :
- OpenAIRE
- Journal :
- Frattura ed Integrità Strutturale
- Accession number :
- edsair.doi.dedup.....7b2fbf5b52ed5eee881ffc358bf9d427