# Method for resonant measurement

## Abstract

A method of measurement of objects to determine object flaws, Poisson`s ratio ({sigma}) and shear modulus ({mu}) is shown and described. First, the frequency for expected degenerate responses is determined for one or more input frequencies and then splitting of degenerate resonant modes are observed to identify the presence of flaws in the object. Poisson`s ratio and the shear modulus can be determined by identification of resonances dependent only on the shear modulus, and then using that shear modulus to find Poisson`s ratio using other modes dependent on both the shear modulus and Poisson`s ratio. 1 fig.

- Inventors:

- Publication Date:

- Research Org.:
- University of California

- OSTI Identifier:
- 203892

- Patent Number(s):
- US 5,495,763/A/

- Application Number:
- PAN: 8-075,159

- Assignee:
- PTO; SCA: 420500; 360000; PA: EDB-96:060615; SN: 96001559474

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

- Resource Type:
- Patent

- Resource Relation:
- Other Information: PBD: 5 Mar 1996

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; 36 MATERIALS SCIENCE; MATERIALS; DEFECTS; MECHANICAL PROPERTIES; MATERIALS TESTING; MEASURING METHODS; DETECTION; SHEAR PROPERTIES; POISSON RATIO

### Citation Formats

```
Rhodes, G.W., Migliori, A., and Dixon, R.D..
```*Method for resonant measurement*. United States: N. p., 1996.
Web.

```
Rhodes, G.W., Migliori, A., & Dixon, R.D..
```*Method for resonant measurement*. United States.

```
Rhodes, G.W., Migliori, A., and Dixon, R.D.. Tue .
"Method for resonant measurement". United States.
```

```
@article{osti_203892,
```

title = {Method for resonant measurement},

author = {Rhodes, G.W. and Migliori, A. and Dixon, R.D.},

abstractNote = {A method of measurement of objects to determine object flaws, Poisson`s ratio ({sigma}) and shear modulus ({mu}) is shown and described. First, the frequency for expected degenerate responses is determined for one or more input frequencies and then splitting of degenerate resonant modes are observed to identify the presence of flaws in the object. Poisson`s ratio and the shear modulus can be determined by identification of resonances dependent only on the shear modulus, and then using that shear modulus to find Poisson`s ratio using other modes dependent on both the shear modulus and Poisson`s ratio. 1 fig.},

doi = {},

journal = {},

number = ,

volume = ,

place = {United States},

year = {Tue Mar 05 00:00:00 EST 1996},

month = {Tue Mar 05 00:00:00 EST 1996}

}

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