Computer modelling of operating processes for both simulational and experimental investigation of fracture problems

• Autorzy: Čačko J.
• Konferencja: Summer School Of Fracture Mechanics. Current Research On Fatigue And Fracture/sympozjum (VII ; 18-22.06.2001 ; Opole - Pokrzywna, Poland)
• Języki publikacji: EN

Abstrakty

EN

The problem of evaluation and computer modelling of operational processes with both continuous and discontinuous nature is presented in the paper. We suppose the knowledge of statistical characteristics of the continuous component in the frame of correlation theory - frequency probability density function of the distribution and power spectral density or autocorrelation function respectively. A simulation model is based on modelling of time-series with application for gaussian and nongaussian processes. Discontinuous events are assumed as a sequence of various impacts with Poissonian distribution, and they are superimposed to a continuous component. A cumulative damage is continuously evaluated regarding to a closed hysteresis loops counting. A fatigue damage mechanism is represented either by rainflow matrix or by a fatigue damage function. The function is specified using some hypothesis of a fatigue cumulative damage and fatigue failure criteria.

Słowa kluczowe

EN

computer modelling; operating processes; Gaussian process; nongaussian process; Poisson distribution; fatigue damaging processes

• Wydawca: Oficyna Wydawnicza Politechniki Opolskiej
• Czasopismo: Zeszyty Naukowe. Mechanika / Politechnika Opolska
• Rocznik: 2001
• Tom: z. 67
• Strony: 7--26
• Opis fizyczny: Bibliogr. 11 poz., il., schem., wykr.

Twórcy

autor

Čačko J.

• Institute of Materials and Machine Mechanics Slovak Academy of Sciences, Bratislava

Bibliografia

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• [5] CACKO J., BILY M., Simulation of a non-stationary stochastic process with respect to its power spectral density, J. Sound and Vibration, 66 (2), 1979, pp. 277-284
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• [7] CACKO J., Simulated estimation of residual life of impactly loaded structures, Proc. of SUSI '92, Portsmouth, 1992, pp. 131-138
• [8] CACKO J. Simultaneous computer simulation of operational random processes and continual rainflow counting. Int. J. Fatigue, 14, No 3, 1992, pp. 183-188
• [9] CACKO J., PETROVIC M., Computer model of a dynamic loading reconstruction on the basis of rainflow matrices, Proc. of Numerical Methods in Continuum Mechanics, University of Żilina, Stara Leśna, 1994, pp. 193-200
• [10] CACKO J., Computer fatigue life assessment of operationally loaded structures, Int. J. Structural Safety, Elsevier, Vol. 12, No 2, 1993, pp. 151-158
• [11] CACKO J., Simulation of an influence of the multiaxial complex loading on the fatigue life. Proc. of MAT-TEC '91, Paris, 1991, pp. 37-42