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1 Journal of Achievements in Materials and Manufacturing Engineering

1 2009

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Numerical simulation of fatigue degradation process of polymer materials using diagnostic acoustic characteristics

Wróbel G., Kaczmarczyk J.

Journal of Achievements in Materials and Manufacturing Engineering

2009

Vol. 36, nr 2

168-175

Purpose: The objective of the work was to construct the finite elements model for simulation of acoustic wave propagation process in polymer material in the aspect of diagnostic of fatigue changes. Design/methodology/approach: Flat model was composed from finite elements with elastic properties of represented medium. Procedure of model modification corresponding with material fatigue degradation was presented. Acoustic and strength characteristics achieved as a result of numerical analysis gave the basis of numerical diagnostic of degradation process. Findings: Structural modification possibilities of numerical model needed to obtain conformity of experimentally affirmed correlation of strength and acoustic characteristics of material have been indicated. Research limitations/implications: Developed method allows the identification of material’s residual load capacity state on the basis of given, determined in diagnostic process its acoustic characteristics. The method also enables the simulation of variable fatigue process of material in complex constructional conditions. Practical implications: Practical utilization of the model consists in prediction possibility of material state of complex constructional elements in varied operating conditions – on the basis of failure cumulation hypothesis. Originality/value: The value of developed model is in its practical usability in simulation diagnostic process. Simulation method with idea of diagnostic simulation is the original part of the present work.