Location

La Jolla, CA

Start Date

1-1-1993 12:00 AM

Description

The natural frequencies and modes of vibration of a linearly elastic continuum are a function of the mass and stiffness of the body [1]. As many structural flaws, such as fatigue cracks, corrosion, and disbonds, will affect these attributes, vibrational analysis is a natural method by which to characterize such flaws. Finite element modeling techniques can be used to predict vibrational responses from various structure/defect combinations, so that test parameters can be selectively chosen for the requirements of the investigation. Critical areas can be isolated through the application of appropriate boundary conditions, and test frequencies chosen so as to excite desired eigen-modes.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

12B

Chapter

Chapter 7: Nonlinearity, Deformation and Fracture

Section

Stress and Fatigue Cracks

Pages

2145-2151

DOI

10.1007/978-1-4615-2848-7_273

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Fatigue Crack Characterization in Conducting Sheets by Non Contact Stimulation of Resonant Modes

La Jolla, CA

The natural frequencies and modes of vibration of a linearly elastic continuum are a function of the mass and stiffness of the body [1]. As many structural flaws, such as fatigue cracks, corrosion, and disbonds, will affect these attributes, vibrational analysis is a natural method by which to characterize such flaws. Finite element modeling techniques can be used to predict vibrational responses from various structure/defect combinations, so that test parameters can be selectively chosen for the requirements of the investigation. Critical areas can be isolated through the application of appropriate boundary conditions, and test frequencies chosen so as to excite desired eigen-modes.