Abstract
Influence of higher modes of vibration in the dynamic analysis of impact three point bend specimen based on Euler-Bernoulli and Timoshenko beam theories are investigated in an attempt to predict the oscillatory behavior seen in the measured dynamic SIF history. Forced vibration of the cracked beam is analyzed by normal mode summation method. Contact force history computed using fundamental mode approximation is applied as input forcing function and the computed SIF histories are compared with finite element model and experimental data. Analytical and finite element results show that modes higher than the third have practically no influence on the notched beam response.
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Marur, P.R. On the effects of higher vibration modes in the analysis of three point bend testing. Int J Fract 77, 367–379 (1996). https://doi.org/10.1007/BF00036253
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DOI: https://doi.org/10.1007/BF00036253