Diagnosis of Fracture Damage in Simple Structures: A Modal Method.
Abstract
The present paper explores a method to locate fracture damage in a structure, and to estimate the intensity of the damage. It is noted that when fracture damage occurs in a structure, the modal frequencies of the damaged structure will shift. The perturbations in individual modal frequencies are governed uniquely by the intensity of the damage and its location in the structure. Consequently, when the frequency spectrum of an unflawed structure is available, field measurement of the structural response after a major event could lead to an estimate of intensity and location of its damage. The existence of a crack renders an overall softening effect in the compliance of the structure. The reduction in stiffness can be quantified by the location and the intensity of the crack. With such a model, the diagnosis of the fracture damage is fundamentally a structural identification.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1982
- Accession Number
- ADA125714
Entities
People
- Eric T. Wong
- Frederick D. Ju
- Mehmet Akgun
- Thomas L. Paez
Organizations
- University of New Mexico