OBJECTIVE Trauma-associated cartilage fractures occur in children and adolescents with clinically significant incidence. Several studies investigated biomechanical injury by compressive forces but the injury-related stress has not been investigated extensively. In this study, we hypothesized that the biomechanical stress occurring during compressive injury predetermines the biomechanical, bioch...

Unpredicted loading caused by blast or impact may lead to severe damage in structures. Such damage may affect the whole structural performance. Connections are the key contributor to the integrity and energy dissipation capacity of the structural steel systems and play the most important role in mitigating such consequences. In the view of the importance of connections, finite element analysis ...

1 Recent progress in the application of the electro-mechanical (E/M) impedance method to structural health monitoring, damage detection, and failure prevention is presented. A brief review of the E/M impedance method principles is followed by applications to bolted and spot-welded structural joints, and to polymeric composite overlays to construction engineering structures. The modeling of the ...

The purpose of this paper is to present an innovative application within the Non Destructive Testing field based upon vibration measurements developed by the authors during these past four years at the Department of Aeronautical Engineering of the University of Naples “Federico II” (Italy). This proposed new method is based upon the acquisition and comparison of the Frequency Response Functions...

Recent advances in Statistical Learning techniques have enabled the development of new algorithms for monitoring, data cleansing, data compression, structural identification, damage identification, and structural dynamics in general. This keynote presents novel sparse and low-rank methods to address the inverse problems in structural dynamics, identification, and data-driven health monitoring. ...

Loss of plasma con®nement causes surface and structural damage to plasma-facing materials (PFMs) and remains a major obstacle for tokamak reactors. The deposited plasma energy results in surface erosion and structural failure. The surface erosion consists of vaporization, spallation, and liquid splatter of metallic materials, while the structural damage includes large temperature increases in s...

Loss of plasma co@nement causes surface and structural damage to plasma-facing materials (PFMs) and remains a major obstacle for tokamak reactors. The deposited plasma energy results in surface erosion and structural failure. The surface erosion consists of vaporization, spallation, and liquid splatter of metallic materials, while the structural damage includes large temperature increases in st...

The integrity and safety of metallic structures can be jeopardized by structural damage (e.g., yielding, cracking, impact, corrosion) that can occur any time. While various sensors have been proposed and validated for structural health monitoring, most sensors only provide data at a discrete point on the structure. Here, a carbon nanotube-polyelectrolyte sensing skin is proposed for monitoring ...

Structural damage can be controlled in performance based seismic design (PBSD) according to the requirement under a certain hazard level. During strong ground motion (GM) such buildings suffer minor to major damages depending on the shaking level of GM. The available damage assessment methods are complex, tedious and time-consuming procedure. In the present study, a simplified empirical model h...

Seismic design relies on inelastic deformations through hysteretic behavior. However, this translates into damage on structural elements, permanent system deformations following an earthquake, and possibly high cost for repairs. An alternative design approach is to concentrate damage on disposable and easy to repair structural elements (i.e., “structural fuses”), while the main structure is des...