Materials Research Group publications

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Browsing Materials Research Group publications by Author "Australasian Congress on Applied Mechanics (5th : 2007 : Brisbane, Australia)"

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    Crack under shear loading in a plate of finite thickness
    (Engineers Australia, 2007) Kotooussov, A.; Codrington, J.; Australasian Congress on Applied Mechanics (5th : 2007 : Brisbane, Australia); Martin Veidt,
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    Investigation of plasticity-induced fatigue crack closure
    (Engineers Australia, 2007) Codrington, J.; Kotooussov, A.; Australasian Congress on Applied Mechanics (5th : 2007 : Brisbane, Australia); Martin Veidt,
    Abstract: Plasticity induced crack closure and constraint effects due to finite plate thickness are both fundamental aspects in the mechanics of fatigue cracks. Moreover, plasticity induced crack closure provides an effective first-order correction to the crack driving force, as used in the correlation and prediction of fatigue crack growth. The approach developed in this study utilises the distributed dislocation technique to model fatigue cracks growing under constant amplitude loading in finite thickness plates. Numerical results are obtained through the application of Gauss-Chebyshev quadrature and are presented for the crack opening stress ratio. An excellent agreement is observed with previous three-dimensional finite element studies.
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    New passive defect detection technique
    (Engineers Australia, 2007) Wildy, S.; Kotooussov, A.; Codrington, J.; Australasian Congress on Applied Mechanics (5th : 2007 : Brisbane, Australia); Martin Veidt,
    This paper discusses the development of a new passive technique of on-line damage detection based on the most fundamental concept in continuum mechanics: strain compatibility. The main feature of this technique is its invariance to changing operating conditions. The technique is quite general and can be applied to structures made of isotropic or anisotropic materials and structural components experiencing elastic or plastic deformations. A few practical situations, involving the development of crack damage in plate structures, are considered to demonstrate the feasibility of this crack detection technique, as well as its potential for many practical applications. Future work will focus on the experimental validation of the technique.