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Sequential optimized design method of equal thickness laminated composite plate

A composite material layer and sequence optimization technology, applied in computing, special data processing applications, instruments, etc., can solve problems such as slow convergence speed, limited application area, and low search efficiency

Active Publication Date: 2015-10-28
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to overcome the shortcomings of slow convergence speed, low search efficiency, and limited application area in the prior art, the present invention proposes an optimal design method for the layup sequence of equal-thickness composite material laminates

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  • Sequential optimized design method of equal thickness laminated composite plate
  • Sequential optimized design method of equal thickness laminated composite plate
  • Sequential optimized design method of equal thickness laminated composite plate

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Embodiment Construction

[0051] The bending deformation and buckling characteristics of the laminate are mainly affected by the bending stiffness parameters. The present invention is only aimed at the balanced and symmetrical lay-up situation, that is, four kinds of laying angles (0°, 45°, -45°, 90°) in the engineering laminate The middle is symmetrical along the middle plane and the amount of plies with an orientation angle of ±45° is equal. The present invention assumes that the thickness of each stratum and the initial stratum laying sequence of four laying angles are known. It is the core design idea of ​​the present invention to control the bending stiffness parameters to satisfy the mechanical properties of the laminate by optimizing the lay-up sequence of each single layer of the laminate. And the orientation angle of adjacent plies cannot change more than 45°. The core technology of the present invention is based on the discrete expression of the bending stiffness parameter, and according to ...

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Abstract

Provided is a sequential optimized design method of equal thickness laminated composite plates. In design of layup sequence, influence of composite material mechanical model on an objective function is considered, and a set of simple and efficient layup design strategy is established, so that a bending rigidity parameter of laminate plate is optimized, and each engineering constraint can be preferably processed. The optimized design method of laminate plates can make project planners liberate from a fussy laminate layup sequence optimizing problem, and an optimal laminate layup sequence satisfying bending performance and project constraint can be rapidly determined.

Description

technical field [0001] The invention relates to the design field of composite material laminated boards, in particular to a method for optimizing the layering sequence of equal-thickness composite material symmetrically balanced laminated boards. Background technique [0002] Fiber-reinforced resin-based composite materials are often used in laminated form for engineering structures with large-area wall panels that bear in-plane and out-of-plane loads. In engineering, composite material laminates usually have four fiber directions, namely 0°, +45°, The -45° and 90° corner plies are stacked with multiple prepreg sheets. The key design factor is to solve the problem of the alternating sequence of each single layer of different corner plies, so as to improve the bending resistance of the laminate and avoid Problems such as delamination and damage that are easy to form in engineering applications; at the same time, in terms of process mechanical properties, the laying amount of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 景钊孙秦
Owner NORTHWESTERN POLYTECHNICAL UNIV
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