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Method for predicting strength of composite material laminated plate containing hole-making layering damage

A composite material layer and composite material technology, applied in the field of composite material detection, can solve problems such as deviation of simulation results

Active Publication Date: 2021-06-04
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, there are many research methods for the strength and damage prediction of composite laminates, but most of them assume that the laminates are defect-free, which leads to deviations between simulation results and reality.

Method used

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  • Method for predicting strength of composite material laminated plate containing hole-making layering damage
  • Method for predicting strength of composite material laminated plate containing hole-making layering damage
  • Method for predicting strength of composite material laminated plate containing hole-making layering damage

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Embodiment

[0073]Step 1. According to the composite material constitutive model in the specific embodiment, this example utilizes the VUMAT user-defined subroutine interface in the ABAQUS software to define the constitutive model of the intralayer unit of the composite material and the constitutive model of the interlayer cohesive force unit, And establish the corresponding two material properties in the software, and fill them in order according to the actual material mechanical performance parameters. The laminated board in this example is T700 carbon fiber reinforced epoxy resin composite material, and its specific mechanical property parameters are shown in Table 2.

[0074] Step 2. Establish the geometric model of the laminated board according to the example that needs to be simulated and analyzed. This example model uses a perforated laminated board with a size of 300mm×36mm×3mm. The diameter of the hole is 6mm, and the thickness of the single layer is 0.125mm.

[0075] Table 2 Mec...

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Abstract

The invention discloses a method for predicting the strength of a composite material laminated plate containing hole-making layering damage. The method mainly comprises the following steps of: establishing constitutive models of an in-layer unit and an interlayer unit of a composite material; compiling constitutive models of the in-layer unit and the interlayer unit of the composite material by using a VUMAT interface of the ABAQUS; establishing a finite part model of the complete composite material laminated plate and the composite material laminated plate with the layering defect; and establishing boundary conditions for the laminated plate model, applying a load, and calculating in ABAQUS to obtain a load-displacement curve and an overall damage value cloud chart of the two models at a load applying position. According to the method, the influence of different layering defects on the strength of the composite laminated plate can be effectively predicted, a certain guiding significance is achieved for further establishing a reasonable hole making quality evaluation index, and the mapping relation between the hole making technology and the service performance is established.

Description

technical field [0001] The invention relates to a technique in the field of composite material detection, in particular to a method for strength prediction and damage analysis of a fiber reinforced composite laminate structure based on finite element simulation analysis. Background technique [0002] Compared with metal materials, composite materials have higher specific strength and specific modulus, and have significant advantages in corrosion resistance and fatigue resistance, so they have been widely used in the aerospace field. For aerospace structures, weight is an important factor affecting the fuel consumption rate of flying objects. Extensive use of carbon fiber reinforced composite materials can optimize the structural weight of aircraft without affecting the structural strength. As an important research method of composite materials, finite element simulation plays a very important role in the design and analysis of laminate components. The simulation results can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F113/26G06F119/14
CPCG06F30/23G06F2113/26G06F2119/14
Inventor 秦旭达陈世广李皓李士鹏赵庆
Owner TIANJIN UNIV
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