Abstract
The directivity patterns of the higher harmonics generated by the interaction between a bulk wave and a closed crack are obtained in the far field. A Finite Element (FE) model gives the near field solution which is then analytically propagated with expressions based on Hankel functions. The crack is modeled by an interface of unilateral contact with Coulomb's friction which takes into account a compression pre-stress s0 that closes the crack. The mode conversion occurring at the crack investigated. Moreover, the diffracted fields of the generated higher harmonics are compared to those of the fundamental harmonic.
| Original language | English (US) |
|---|---|
| Pages | 1676-1683 |
| Number of pages | 8 |
| State | Published - 2014 |
| Event | 7th European Workshop on Structural Health Monitoring, EWSHM 2014 - Nantes, France Duration: Jul 8 2014 → Jul 11 2014 |
Other
| Other | 7th European Workshop on Structural Health Monitoring, EWSHM 2014 |
|---|---|
| Country/Territory | France |
| City | Nantes |
| Period | 7/8/14 → 7/11/14 |
All Science Journal Classification (ASJC) codes
- Civil and Structural Engineering
- Safety, Risk, Reliability and Quality
- Building and Construction
- Computer Science Applications
Keywords
- Finite elements
- Higher harmonics
- Nonlinear acoustics
- Scattering