OPTIMAL DESIGN OF TIMBER STRUCTERES REINFORCED WITH FIBERS

Abstract eng:
Limited sources of material and energy rapidly affected a demand for lightweight, efficient and low cost structures, what secondly influenced the developing of new design approaches, called optimal design techniques. Authors partially deal with some problems of timber beams reinforced with different fibers, mainly the glass fibers as well as carbon fibers. The beam is modeled as a multi layered structure using the 3D brick elements in ANSYS. Some results of limit state and optimal topology of reinforcement are presented. Introduction In past decades people who worked in the field of structural optimization were divided into two distinct camps. On one side there was the mathematical programming camp who believed in employing the general methods of linear and non-linear programming such as penalty function techniques, the gradient projection technique and the method of feasible directions. On the other side there was the optimality criteria method camp which subscribed to the use of intuitive optimality criteria methods. The first group many times decried the lack of generality in the optimality criteria methods and the other group criticized the inefficiency of the mathematical programming approach. Recently the two approaches began to converge. This paper deals with some engineering techniques used in optimization process, well-known as structural optimization. That gives a relatively simple and easy answer on the question, how designed components obtain their shape and dimensions. These methods are mainly based on the Finite Element Method, widely used by scientists and engineers, with an implementation of optimization procedures.

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