Estimation of Dynamic Stress Intensity for One-Point Bend Specimen by Inverse Analysis.

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  • GUNAWAN Fergyanto E.
    Department of Mechanical Engineering, Toyohashi University of Technology
  • HOMMA Hiroomi
    Department of Mechanical Engineering, Toyohashi University of Technology
  • SHAH Qashim H.
    Department of Mechanical Engineering, International Islamic University
  • MIHRADI Sandro
    Department of Aeronautical Engineering, Bandung Institute of Technology

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  • Estimation of Dynamic Stress Intensity for One-Point Bend Specimen by Inverse Analysis(Fracture Mechanics)

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The inverse method applied successfully to several basic structures is extended to estimate dynamic stress intensity-time history for one point bend specimens. The response functions of the specimens are estimated by de-convolving the specimen response measured near the crack tip with the measured impact force. Two methods of deconvolution were used, e. g., a simple statistical method and a CG-FFT iteration method. The ill-posed nature of the deconvolution is removed successfully by the CG-FFT method and then the excellent estimation is obtained.

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