Fiber reinforced composite material structure optimization method based on Shepard interpolation

A fiber-reinforced and composite material technology, applied in the fields of instruments, calculations, electrical digital data processing, etc., to achieve the effects of easy processing and manufacturing, reduced design variables, and high optimization efficiency

Active Publication Date: 2018-01-16
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

However, for complex problems, the analytical form of the feasible region of layer parameters is still an open problem

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  • Fiber reinforced composite material structure optimization method based on Shepard interpolation
  • Fiber reinforced composite material structure optimization method based on Shepard interpolation
  • Fiber reinforced composite material structure optimization method based on Shepard interpolation

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Embodiment Construction

[0039] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0040] see figure 1 , this embodiment takes the optimization problem of minimizing the flexibility of a planar cantilever beam fiber-reinforced structure with concentrated load as an example to explain the present invention. The initial layout of fiber angles is given in a given 1×2 rectangular design domain D, and the initial fiber angles are set to 90 in this example 0 , a displacement const...

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Abstract

The invention belongs to the field of composite material structure optimization methods, and discloses a fiber reinforced composite material structure optimization method based on Shepard interpolation. The method comprises the following steps of uniformly defining a series of discrete design points in a composite structure design domain, and building a continuous overall function to express a whole design domain fiber angle by using fiber angle values at the design points in a Shepard interpolation format; defining a fiber reinforced composite material structure optimal design problem, wherein a designing target is to minimize flexibility of the structure, and design constraints comprise a balance equation and upper and lower limits of [theta]i; dividing finite element grids to perform finite element analysis, and solving a displacement field; deducing sensitiveness of the flexibility of a target function with respect to a design variable, and computing the sensitiveness by using a finite element result; and updating the design variable by using an optimal algorithm until the target function is converged. According to the method provided by the invention, an optimization result fully utilizes material performance, manufacturing is facilitated, the design variable is reduced and optimization efficiency is relatively high.

Description

technical field [0001] The invention belongs to the field of structural optimization methods for composite materials, and more particularly relates to a method for optimizing the structure of fiber-reinforced composite materials based on Shepard interpolation. . Background technique [0002] Fiber-reinforced composite material is a representative advanced composite material, which is composed of low-density, high-strength fiber material and matrix material. Among them, the reinforcing materials are mainly various fibers, which play a major role in composite materials, providing strength and stiffness, and controlling their basic properties. The matrix material uses various metals, non-metals or resin bases, etc., to play a coordinating role. It supports and fixes fiber materials, transmits loads between fibers, protects fibers, prevents wear or corrosion, and improves certain properties of composite materials. Therefore, fiber-reinforced composite materials have much highe...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 夏奇史铁林
Owner HUAZHONG UNIV OF SCI & TECH
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