Optimization of composite structures in vibration view

الموضوعات : Analytical and Numerical Methods in Mechanical Design

SM. azizisough ¹ , MH. Yas ² , MM. Najafi Zadeh ³

1 - Department of Mechanic, Islamic Azad University branch of Arak
2 - Department of Mechanic, Kermanshah Razi University
3 - Department of Mechanic, Kermanshah Razi University, Kermanshah, Iran.

تاريخ الإرسال : 25 الأربعاء , صفر, 1444 تاريخ التأكيد : 25 الأربعاء , صفر, 1444 تاريخ الإصدار : 02 الأربعاء , ذو القعدة, 1443

الکلمات المفتاحية: Genetic Algorithm, Optimization, Vibration, Composite laminate,

ملخص المقالة :

Two dimensional analysis of fluid flow and heat transfer through the trapezoidal microchannel has been done. The energy and Nervier stokes equations have been solved considering the wall slip velocity and temperature jump using the Lattice Boltzmann method (LBM). The relation between relaxation times and Knudsen number has been derive in LBM. The effects of Reynolds number, Nusslelt number, temperature jump and velocity slip on different Knudsen number (0.001<Kn<0.1) and different aspect ratios (0.2<AR<1.2) were investigated. The good agreement between results and earlier studies were found. Results show the important effect of AR and Knudsen number on Nusselt number in trapezoidal microchannel. At low Reynolds number the significant influence on Nusselt number has been seen.

المصادر:

1. Miki (1982) "Material Design of Composite Laminates with Required In-Plane ElasticProperties," Progress in Science and Engineering of Composites, Vol. 2, 1725-1731.


2. Hayashi,T. Kawata, K. and Umekawa, S. (eds.) ICCM-IV, Tokyo..K.J. Callahan and G.E. Weeks, "Optimum Design of Composite Laminates Using GeneticAlgorithms," Composite Engineering, 2(3), 149-160.


3. Le Riche and R.T. Haftka (1993) , "Optimization of Stacking Sequence Design forBuckling Load Maximization by Genetic Algorithms," AIAA Journal, 31(5), 951-956.


4. T. McMahon, L.T. Watson, G.A. Soremekun, Z. Gürdal, and R.T. Haftka (1998), "AFortran 90 Genetic Algorithm Module for Composite Laminate Structure Design" Engineeringwith Computers, 14, pp. 260-273.


5. Deb (2001), Multi-Objective Optimization Using Evolutionary Algorithms, UK Wiley,Chichester.


6. Gürdal, R. T. Haftka and P. Hajela (1998), “Design and Optimization of LaminatedComposite Materials”, Wiley Interscience, p. 300.


7. F. Ashby (2000), “Multi-objective optimization in material design and selection”, ActaMaterialia 48, pp. 359-369.


8. A. Coello (2000), A. D. Christiansen, “Multi-objective optimization of trusses using geneticalgorithms”, Computers and Structures 75, pp. 647-660.