Open Access

ARTICLE

D. Schleh¹, D. Liu¹
Structural Durability & Health Monitoring, Vol.9, No.3, pp. 201-216, 2013, DOI:10.32604/sdhm.2013.009.201
Abstract Understanding the response of composite materials to dynamic loading is necessary for their safe and efficient application to many of the world’s engineering designs where stiffness-to-weight ratios are vitally important. In this study, fringe projection was used and evaluated as means to measure the out-of-plane displacement of composite materials from impact loading involving a projectile accelerated horizontally through the use of gas. The capability of providing out-ofplane deformation measurements can largely enrich the investigation of composite materials under horizontal impact which are commonly performed without any measurement other than projectile velocity. The out-of-plane displacement history More >

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Open Access

ARTICLE

F. Caputo¹, G. Lamanna¹, A. Soprano¹
Structural Durability & Health Monitoring, Vol.9, No.3, pp. 217-232, 2013, DOI:10.32604/sdhm.2013.009.217
Abstract In recent years, the study of the behaviour of damaged structures has been focusing on cracked components in presence of an extensive material yielding at the crack tip; under this condition, linear elastic fracture mechanics theory is not able to describe the real stress-strain state at the crack tip and consequently either the static or the fatigue behaviour of the component. In this work, an extensive parametric numerical analysis of the plastic zone size and shape at the crack tip for a through cracked plate under Mode I loading condition is presented. The obtained results More >

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Open Access

ARTICLE

Dongyue Gao¹, Yishou Wang¹, Zhanjun Wu¹, Rahim Gorgin¹
Structural Durability & Health Monitoring, Vol.9, No.3, pp. 233-252, 2013, DOI:10.32604/sdhm.2013.009.233
Abstract In this study, a Lamb wave-based damage extension diagnosis method to monitor the damage on typical structures of composite aircraft is proposed. First, an overview of the damage extension diagnosis method is given. In the method, probability-based damage diagnostic imaging was combined with empirical threshold value to distinguish damage location and estimate damage size in damage extension process. To validate the effectiveness of method, extension diagnosis of simulate delamination damage in typical structure on aircraft were processed. To illustrate the capability of the damage extension diagnostic method, a delamination growth monitoring experiment was performed in More >

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ARTICLE

F. Caputo, G. Lamanna, A. De Luca¹, R. Borrelli, S. Franchitti²
Structural Durability & Health Monitoring, Vol.9, No.3, pp. 253-267, 2013, DOI:10.32604/sdhm.2013.009.253
Abstract The aim of the proposed research activity is to investigate on the structural behaviour of laminated composite plates, in order to develop numerical models able to describe their "damage resistance" under low velocity impacts. To achieve these results it is necessary to provide understanding of and ultimately predict the initiation and the progression mechanisms of damage. Since analytical closed-form methods are unable to describe simultaneously different failure modes and experimental testing can give indications only for specific cases, not generally applicable, it is necessary to improve numerical techniques, which on the base of opportunely selected More >

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