Papers by Author: W.J. Staszewski

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Authors: M.T.H. Sultan, Alma Hodzic, W.J. Staszewski, Keith Worden
Abstract: The ultimate objective of the current programme of work is to detect and quantify low-velocity impact damage in structures made from composite materials. There are many situations in the use of composites where an impact does not result in perforation of the material but causes damage that may not be visible, yet still causes a substantial reduction in structural properties. Impacts that do not cause perforation are usually termed low-velocity. When a composite structure undergoes such impacts, it is important to know the type and level of damage and assess the residual strength. In this study, following a systematic series of experiments on the induction of impact damage in composite specimens, Scanning Electron Microscopy (SEM) was used to inspect the topographies of the specimens at high magnification. Matrix cracking, fibre fracture, fibre pullout and delamination were the types of damage observed in the composite laminates after the low-velocity impacts. The study also conducted a (very) preliminary correlation between the damage modes and the impact energy.
Authors: C. Biemans, W.J. Staszewski, C. Boller, Geoffrey R. Tomlinson
Authors: W.J. Staszewski, Gareth Pierce, Keith Worden, B. Culshaw
Authors: B.C. Lee, Graeme Manson, W.J. Staszewski
Authors: W.J. Staszewski, C. Biemans, C. Boller, Geoffrey R. Tomlinson
Authors: M. Taghvaei, S.B.M. Beck, W.J. Staszewski, J.B. Boxall
Authors: I. Al-Shidhani, S.B.M. Beck, W.J. Staszewski
Authors: W.J. Staszewski
Abstract: Structural damage detection and monitoring is one of the major maintenance activities in transportation, processing and civil engineering. Current procedures are based on scheduled inspections which are often time/labour consuming and expensive. Guided ultrasonic waves offer the ability of inspecting large structures with a small number of transducers. Recent developments in smart sensor technologies allow for integration of these transducers with monitored structures. This is associated with a new design philosophy leading to more efficient and economically attractive structures. The paper briefly discusses various damage detection methods based on structural, ultrasonic and guided ultrasonic waves. The focus is on recent research advances in damage monitoring techniques, smart sensor technologies and signal processing.
Authors: W.J. Staszewski, Karen M. Holford
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