Author
Thomas G. Chondros
Bio: Thomas G. Chondros is an academic researcher from University of Patras. The author has contributed to research in topics: Vibration & Fracture mechanics. The author has an hindex of 16, co-authored 55 publications receiving 2131 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this paper, a continuous cracked beam vibration theory is developed for the lateral vibration of cracked Euler-Bernoulli beams with single-edge or double-edge open cracks.
503 citations
TL;DR: In this paper, a continuous cracked beam vibration theory is used for the prediction of changes in transverse vibration of a simply supported beam with a breathing crack, where the equation of motion and the boundary conditions of the cracked beam considered as a one-dimensional continuum were used.
324 citations
TL;DR: In this article, the influence of a crack in a welded joint on the dynamic behavior of a structural member is discussed and the relation between the change in natural frequency of vibration of a cantilever beam and the crack depth that appears at the built-in edge which is clamped by way of a weld is investigated.
246 citations
TL;DR: In this article, a homogeneous, isotropic, elastic bar of orthogonal shape with a single edge crack under alternating uniform axial stress was considered, and an analytical determination of the dynamic characteristics of the cracked structure yielded the damping factor of the bar, the material damping factors and a good correlation of depth of crack with the dampness factor.
95 citations
Cited by
More filters
TL;DR: The use of natural frequency as a diagnostic parameter in structural assessment procedures using vibration monitoring is discussed in this paper, based on the fact that natural frequencies are sensitive indicators of structural integrity.
1,885 citations
TL;DR: In this paper, a crack in a structural member introduces a local flexibility that affects its vibration response, and the crack will open and close in time depending on the rotation and vibration amplitude.
1,080 citations
TL;DR: In this article, the authors proposed a non-destructive testing method for crack identification, which requires amplitude measurements at two positions of the structure only and is applicable to all one-dimensional structures.
721 citations
TL;DR: In this paper, the dependence of natural frequencies and modal damping coefficients on deterioration in structures is examined, and the magnitude of change in natural frequencies is a function of the severity and of the location of deterioration.
Abstract: Nondestructive inspection of structures by modal analysis of vibration response is reported. The dependence of natural frequencies and modal damping coefficients on deterioration in structures is examined. The magnitude of change in natural frequencies is a function of the severity and of the location of deterioration in structures. Ratios of changes in natural frequencies normalized with respect to the largest frequency change are independent of severity for small deterioration and can serve to indicate the location of deterioration directly. Specific deterioration events have an associated characteristic ensemble of ratios of natural frequency changes that may be compiled in advance to form a data base for later interpretation of observed modal parameter changes. The modal analysis method is demonstrated in experiments on a welded steel frame exposed to fatigue loading, and on wire ropes damaged by sawcuts. The method holds promise as a condition monitoring tool for bridges and other skeletal structures.
440 citations
TL;DR: In this paper, the authors derived the differential equation and associated boundary conditions for a nominally uniform Bernoulli-Euler beam containing one or more pairs of symmetric cracks and achieved the reduction to one spatial dimension using integrations over the cross-section after plausible stress, strain, displacement and momentum fields are chosen.
386 citations