Home / Journals / SDHM / Vol.5, No.2, 2009
  • Open Access

    ARTICLE

    Temperature Sensitivity Assessment of Vibration-based Damage Identification Techniques

    N.H.M. Kamrujjaman Serker1, Zhishen Wu
    Structural Durability & Health Monitoring, Vol.5, No.2, pp. 87-108, 2009, DOI:10.3970/sdhm.2009.005.087
    Abstract This paper presents the study on the temperature sensitivity of some vibration-based damage identification techniques. With the help of a simple supported beam with different damage levels, reliability of these techniques for damage identification in a changing environmental temperature condition was investigated. The temperature effect was considered as the change in modulus of elasticity of the material. The techniques evaluated herein are based on measured modal parameters which use only few mode shapes and/or modal frequencies of the structure that can easily be obtained by dynamic tests. The effect of temperature on identification of different level of damages at different… More >

  • Open Access

    ARTICLE

    Fatigue Crack Growth Modelling of Aluminium Alloy under Constant and Variable Amplitude Loadings

    S. Abdullah1, S. M. Beden, A. K. Ariffin, N. A. Al-Asady
    Structural Durability & Health Monitoring, Vol.5, No.2, pp. 109-132, 2009, DOI:10.3970/sdhm.2009.005.109
    Abstract This paper presents a study on fatigue crack growth modelling of thin walled tube aluminium alloy with circumferential crack under constant and variable amplitude loadings. Three fatigue crack growth models were investigated for this purpose, i.e. Walker, Forman and NASGRO. The results showed the differences in the fatigue crack growth simulation under both loading types, although, they have the same stress ratio for the maximum value. Subsequently, it was found that, different models gave different fatigue crack growth behaviour. In another case, many factors were identified towards the fatigue crack growth affection in structures. Hence, an initial crack length and… More >

  • Open Access

    ARTICLE

    Studies on Methodological Developments in Structural Damage Identification

    V. Srinivas1, Saptarshi Sasmal1, K. Ramanjaneyulu2
    Structural Durability & Health Monitoring, Vol.5, No.2, pp. 133-160, 2009, DOI:10.3970/sdhm.2009.005.133
    Abstract Many advances have taken place in the area of structural damage detection and localization using several approaches. Availability of cost-effective computing memory and speed, improvement in sensor technology including remotely monitored sensors, advancements in the finite element method, adaptation of modal testing and development of non-linear system identification methods bring out immense technical advancements that have contributed to the advancement of modal-based damage detection methods. Advances in modal-based damage detection methods over the last 20-30 years have produced new techniques for examining vibration data for identification of structural damage. In this paper, studies carried out on damage identification methods using… More >

  • Open Access

    ARTICLE

    A Simple Model for the Evaluation of Constitutive Laws for the Computer Simulation of Fatigue-Driven Delamination in Composite Materials

    Ugo Galvanetto, Paul Robinson, Agostino Cerioni, Carlos Lopez Armas
    Structural Durability & Health Monitoring, Vol.5, No.2, pp. 161-190, 2009, DOI:10.3970/sdhm.2009.005.161
    Abstract This paper presents a simple mathematical model to investigate various formulations of interface elements which are used to simulate fatigue driven delamination in composite materials. To illustrate the effectiveness of the model it is used to evaluate the performance of several different static constitutive laws and damage definitions coupled with a particular fatigue degradation strategy. It is shown that the model can be used to readily assess the robustness and reliability of the different formulations by examining hundreds of thousands of sets of parameter values in a rational and efficient manner. More >

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