Strength Analysis And Numerical Simulation For Glass Fiber Reinforced Plastics Mortar Pipes Based On FEM

Glass Fiber Reinforced Plastics Mortar Pipes (GRP Pipes) is widely used in the field of municipal engineering, chemical engineering, energy, transport engineering and other fields for its superior mechanical properties, low cost and excellent ring stiffness, this paper presents a design method of finite element analysis method to solve the problem of long design cycle and high design cost in the progress of producing GRP pipes. The method presented by this paper is based on the theory of FEM for structural optimization.In another words, this paper is implementing numerical simulation of the mechanical properties of glass pipe structure design scheme research, with finite element analysis software, and optimizing the initial design while ensuring compliance related to the mechanical properties of the GRP pipes and lower manufacturing costs. This optimization method will effectively shorten the design cycle and reduce the costs of designing GRP pipes.GRP pipe computer-aided design methods are proposed for the content GRP pipe axial tensile strength, tensile strength and hoop ring stiffness, respectively, to establish the corresponding numerical simulation model related mechanical analysis based on FEM. The simulation results show that the numerical simulation model established in this paper within the permitted error can accurately predict the mechanical properties of visual overlay structure design. Subsequently, numerical simulation model established in this paper studied the laws of material damage in three capacity situations. The main conclusions are as follows:steel pipe with different GRP pipe tension and compression process was corrupted form layer by layer, and that the original material damage generally occurs in the sand layer,in addition, brittle material damage in the form of a single layer, before reaching the limit load did not yield process; by tensile tests and numerical simulation study tested different GRP pipes and steel pipes found in the relevant literature, axial tensile strength is not necessarily ring tensile strength 1/2 but generally between 1/2?2/3; in addition, numerical simulation study found that GRP pipe axial tensile strength and thickness of the sand layer is substantially inversely proportional to the value of the relationship, and the hoop tensile strength and the thickness of the sand layer numerical relationship is not in a simple linear relationship; in the ring stiffness of GRP pipe Numerical study found that the specimen with sand thickness in total thickness unchanged increase pipeline ring stiffness improved, but the material of the limit load is reduced, so the design you want two good mechanical performance tradeoff.Finally, through a specific project case illustrates the numerical simulation of the proposed use of the auxiliary process design optimization methods, computer-aided simulation and verified the proposed method can greatly improve the design efficiency, reduce design costs, and play an active role in engineering practice.