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Using fem for large deformation analysis of inflated air spring cylindrical shell made of rubber textile cord composite

The results of deformation analysis of the inflated air-spring shell made of composite with rubber matrix reinforced by textile cords are given. Obtained numerical results of deformation correspond to the experimentally measured deformation of the inflated cylindrical air-spring. | Vietnam Journal of Mechanics, VAST, Vol. 28, No. 1 (2006), pp. 10 - 20 USING FEM FOR LARGE DEFORMATION ANALYSIS OF INFLATED AIR-SPRING CYLINDRICAL SHELL MADE OF RUBBER-TEXTILE CORD COMPOSITE TRAN Huu NAM Hanoi University of Technology Abstract. An orthotropic hyperelastic constitutive model is presented for large deformation analysis of the nonlinear anisotropic hyperelastic material of the cylindrical air-spring shell used in vibroisolation of driver's seat. Nonlinear hyperelastic constitutive equations of orthotropic composite material are incorporated into the finite strain analysis by finite element method (FEM). The results of deformation analysis of the inflated air-spring shell made of composite with rubber matrix reinforced by textile cords are given. Obtained numerical results of deformation correspond to the experimentally measured deformation of the inflated cylindrical air-spring. Key words: constitutive model, rubber-textile cord composite, air-spring shell 1. INTRODUCTION Nowadays textile composites and inflatable structures are becoming increasingly popular for a variety of applications in many fields - civil engineering, architecture, vehicle and aerospace engineering. Typical examples include membrane roofs and covers, sails, inflatable buildings and pavillions, airships, inflatable furniture, airspace structures, air-springs etc. The composite materials created of rubber matrix reinforced by textile cords is called rubber-textile cord composites (RCC). This combination of materials is especially effective not only the composite material needs to be strong in extension in the cord direction, but also needs to be flexible in the plane perpendicular to the cords. This property is the special necessary in cylindrical air-springs which are subjected to air pressure. They need the strength and flexibility in the radial direction. A phenomenological constitutive model that is capable of predicting the large deformations of composites with rubber .