# Resonant nonlinear ultrasound spectroscopy

## Abstract

Components with defects are identified from the response to strains applied at acoustic and ultrasound frequencies. The relative resonance frequency shift .vertline..DELTA..function./.function..sub.0.vertline., is determined as a function of applied strain amplitude for an acceptable component, where .function..sub.0 is the frequency of the resonance peak at the lowest amplitude of applied strain and .DELTA..function. is the frequency shift of the resonance peak of a selected mode to determine a reference relationship. Then, the relative resonance frequency shift .vertline..DELTA..function./.function..sub.0 is determined as a function of applied strain for a component under test, where fo .function..sub.0 the frequency of the resonance peak at the lowest amplitude of applied strain and .DELTA..function. is the frequency shift of the resonance peak to determine a quality test relationship. The reference relationship is compared with the quality test relationship to determine the presence of defects in the component under test.

- Inventors:

- (Santa Fe, NM)
- (Los Alamos, NM)
- (Amherst, MA)
- (Sint-Niklaas, BE)

- Publication Date:

- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM

- OSTI Identifier:
- 874168

- Patent Number(s):
- US 6330827

- Assignee:
- The Regents of the University of California (Los Alamos, NM) LANL

- DOE Contract Number:
- W-7405-ENG-36

- Resource Type:
- Patent

- Country of Publication:
- United States

- Language:
- English

- Subject:
- resonant; nonlinear; ultrasound; spectroscopy; components; defects; identified; response; strains; applied; acoustic; frequencies; resonance; frequency; shift; vertlinedeltafunctionfunctionsub0vertline; determined; function; strain; amplitude; acceptable; component; functionsub0; peak; lowest; deltafunction; selected; mode; determine; reference; relationship; vertlinedeltafunctionfunctionsub0; quality; compared; presence; resonance frequency; frequency shift; ultrasound spectroscopy; /73/

### Citation Formats

```
Johnson, Paul A., TenCate, James A., Guyer, Robert A., and Van Den Abeele, Koen E. A.
```*Resonant nonlinear ultrasound spectroscopy*. United States: N. p., 2001.
Web.

```
Johnson, Paul A., TenCate, James A., Guyer, Robert A., & Van Den Abeele, Koen E. A.
```*Resonant nonlinear ultrasound spectroscopy*. United States.

```
Johnson, Paul A., TenCate, James A., Guyer, Robert A., and Van Den Abeele, Koen E. A. Mon .
"Resonant nonlinear ultrasound spectroscopy". United States. https://www.osti.gov/servlets/purl/874168.
```

```
@article{osti_874168,
```

title = {Resonant nonlinear ultrasound spectroscopy},

author = {Johnson, Paul A. and TenCate, James A. and Guyer, Robert A. and Van Den Abeele, Koen E. A.},

abstractNote = {Components with defects are identified from the response to strains applied at acoustic and ultrasound frequencies. The relative resonance frequency shift .vertline..DELTA..function./.function..sub.0.vertline., is determined as a function of applied strain amplitude for an acceptable component, where .function..sub.0 is the frequency of the resonance peak at the lowest amplitude of applied strain and .DELTA..function. is the frequency shift of the resonance peak of a selected mode to determine a reference relationship. Then, the relative resonance frequency shift .vertline..DELTA..function./.function..sub.0 is determined as a function of applied strain for a component under test, where fo .function..sub.0 the frequency of the resonance peak at the lowest amplitude of applied strain and .DELTA..function. is the frequency shift of the resonance peak to determine a quality test relationship. The reference relationship is compared with the quality test relationship to determine the presence of defects in the component under test.},

doi = {},

journal = {},

number = ,

volume = ,

place = {United States},

year = {Mon Jan 01 00:00:00 EST 2001},

month = {Mon Jan 01 00:00:00 EST 2001}

}