Parallel Non-linear Analysis of Laminated Rubber Structures

Abstract

General purpose finite element codes have been widely used for both linear and non-linear structural problems. Many of the real-world problems in structural applications are large in size, and require extensive computational efforts. A prevailing trend in industry is that products must meet more stringent design requirements and in turn require more detailed analysis. Therefore, even more computational efforts for solving large scale problems will be needed. The computing power of current sequential machines is generally inadequate. Recent development in parallel computers provides an opportunity for significant gains in computing capability and also in broadening the range of structural problems that can be solved. The key to success is in the effective implementation of suitable parallel algorithms that can exploit the concurrent features of such machines. In this connection, we have converted a general purpose non-linear finite element program, originally run on sequential machines, with parallel constructs for Intel-Paragon with 140 nodes. In this paper we report our experience of solving non-linear problems on the Intel-Paragon. Particular emphasis will be placed on the non-linear response of laminated structures made of rubber and metal. These structures are widely used for compliance supports, such as elastic hinges of helicopters and flexible joints of offshore platforms. Rubber under the influence of mechanical loads behaves strong non-linearity both in material and geometry.