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Structural Engineering and Mechanics Volume 67, Number 6, September25 2018 , pages 659-669 DOI: https://doi.org/10.12989/sem.2018.67.6.659 |
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Dynamic analysis of non-symmetric FG cylindrical shell under shock loading by using MLPG method |
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Yaser Sadeghi Ferezghi, Mohamad R. Sohrabi and Seyed M. MosaviNezhad
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| Abstract | ||
| The Dynamic equations in the polar coordinates are drawn out using the MLPG method for the non-symmetric FG cylindrical shell. To simulate the mechanical properties of FGM, the nonlinear volume fractions for radial direction are used. The shape function applied in this paper is a form of the radial basis functions, by using this function all the requirements for an effective and suitable shape function are established. Hence in this study, the multiquadrics (MQ) radial basis functions are exploited as the shape function governing the problem. The MLPG method is combined with the the Newmark time approximation scheme to solve dynamic equations in the time domain. The obtained results by the MLPG method to be verified are compared with the analytical solution and the FEM. The obtained results through the MLPG method show a good agreement in comparison to other results and the MLPG method has high accuracy for dynamic analysis of the non-symmetric FG cylindrical shell. To demonstrate the capability of the present method to dynamic analysis of the non-symmetric FG cylindrical shell, it is analyzed dynamically with different volume fraction exponents under harmonic and rectangular shock loading. The present method shows high accuracy, efficiency and capability to dynamic analysis of the non-symmetric FG cylindrical shell with nonlinear grading patterns. | ||
| Key Words | ||
| MLPG; cylindrical sell; FGM; dynamic analysis; volume fraction | ||
| Address | ||
| Yaser Sadeghi Ferezghi and Mohamad R. Sohrabi: Department of Civil Engineering, Faculty of Engineering, University of Sistan and Baluchestan, Zahedan, Iran Seyed M. MosaviNezhad: Department of Civil Engineering, Faculty of Engineering, University of Birjand, Birjand, Iran | ||