排序方式: 共有6条查询结果,搜索用时 15 毫秒
1
1.
An integrated model for optimum weight design of symmetrically laminated composite plates subjected to dynamic excitation is presented in this work. Optimum design procedure based on flexibility and strength criteria is presented. The objective is to determine the optimum thicknesses of the laminate layers and its optimum orientations without exhibiting any failure according to Tsai-Wu failure criterion. The finite element method, based on Mindlin plate theory, is used in conjunction with an optimization method in order to determine the optimum design. Newmark algorithm, as an implicit time integration scheme, is used to discretize the time domain and calculate the transient response of the laminated composite plate. Exterior penalty method is exploited for the constrained minimization procedure. Fletcher-Powell algorithm is used for the unconstrained minimization process. To verify the capability and efficiency of the proposed model, three examples are solved. The examples deal with flexibility and stress constraints for different boundary conditions under various dynamic excitations. 相似文献
2.
Attia Mohammed El Hadi Karthick A. Manokar A. Muthu Driss Zied Kabeel Abd Elnaby Sathyamurthy Ravishankar Sharifpur Mohsen 《Journal of Thermal Analysis and Calorimetry》2021,145(3):1215-1225
Journal of Thermal Analysis and Calorimetry - The Algeria Sahara suffers from the scarcity of drinking water. Solar distillation is one of the simplest and generally inexpensive techniques to solve... 相似文献
3.
Kabeel A. E. Abdelgaied Mohamed Mahmoud G. M. 《Journal of Thermal Analysis and Calorimetry》2021,144(3):907-916
Journal of Thermal Analysis and Calorimetry - In this paper, the experimental study aims to enhance a distillate water productivity of solar stills. To achieve this objective, solar still with... 相似文献
4.
A. A. Hamza I. M. Fouda M. A. Kabeel E. A. Seisa F. M. El-Sharkawy 《Journal of Polymer Science.Polymer Physics》1998,36(4):555-565
Polyester (Egyptian) fibers were annealed at constant temperature (190°C) with different annealing times. Density, crystallinity, mean square density fluctuation, mechanical loss factor, and molecular orientation were calculated. Densities and mechanical loss factor were determined using an acoustic method. Changes in the molecular orientation were evaluated from the resulting optical data using the polarizing Pluta interference microscope. Correlation of data obtained by one method with another leads to relational changes in optothermal properties and in the molecular orientation. Changes of refractive index profiles of annealed PET fibers are provided. Illustrations using graphs and microinterferograms are shown. © 1998 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 36: 555–565, 1998 相似文献
5.
Kabeel A. E. Sathyamurthy Ravishankar El-Agouz S. A. Muthu manokar A. El-Said Emad M. S. 《Journal of Thermal Analysis and Calorimetry》2019,138(6):3987-3995
Journal of Thermal Analysis and Calorimetry - This work presents the experimental studies on the effect of mass stream rate of water (mf), phase change material and cover cooling of an inclined... 相似文献
6.
1