TAILIEUCHUNG - A new finite element for free vibration analysis of stiffened composite plates

The stiffened plate element is a combination of basic triangular element and bar component. The element can accommodate any number of arbitrarily oriented stifeners and obviates the use of mesh lines along the stiffeners. Free vibration analyses of stiffened laminated plates have been carried out with this element and the results are compared with those published. The finite element results show very good matching with the experimental ones. | Vietnam Jo urnal of Mechanics, VAST, Vol. 29 , No. 4 (2007), pp. 529 - 538 A NEW FINITE ELEMENT FOR FREE VIBRATION ANALYSIS OF STIFFENED COMPOSITE PLATES TRAN lCH TRINH Hanoi University of Technology NGO NHU KHOA Thainguy en University Abstract. A new 6-noded stiffened triangular plate element for the analysis of stiffened composite plates based on Mindlins deformation plate theory has been developed. The stiffened plate element is a combination of basic triangular element and bar component. The element can accommodate any number of arbitrarily oriented sti!feners and obviates the use of mesh lines along the stiffeners. Free vibration analyses of stiffened laminated plates have been carried out with this element and the results are compared with those published. The finite element results show very good matching with the experimental ones. 1. INTRODUCTION Eccentrically stiffened plates are widely used as components of structural systems in civil, aerospace, marine and automotive industri es . Stiffeners are commonly attached to plates along the major load-carrying direction to achive higher stiffness/weigth and stength/weigth ratios. To increase further , laminated composites have been first introduced in the aerospace industry, and current l:r· being used in the civil engineering infrastructure such as bridge decks, bridges girders, strenghening and retrofitting existing structures, etc. A number of analytical and numerical models for the analysis of stiffened plates have been proposed in the literature such as Kirk [1], Satsangi [6], Mukhopadhyay [2], Ghosh and Biswal [4], Chao and Lee [5], Kolli [12], Satish Kumar [9], Gangadhara Prusty [8] etc. Among all the numeri cal methods, the finite element method (FEM) has been found to be reasonably accurate with less complexity to model stiffened plates. A more accurate model is achieved by representing the plate and stiffeners separately and maintaining compatibility between them. Thomson [3] et al. and Satsangi

• Cơ khí - Chế tạo máy
• Vietnam Journal of Mechanics
• New finite element for free vibration analysis
• Stiffened composite plates
• Arbitrarily oriented stifeners
• Mesh lines along the stiffeners
• Dang Dinh Ang
• Nonlinear analysis and mechanics
• Dynamic problems involving stationary cracks
• The Wiener Hopt technique
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