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Delamination propagation behavior simulation method of composite material multidirectional laminated plate on basis of cohesion model

A technology of composite materials and simulation methods, which is applied in the field of research and prediction of the delamination expansion behavior of composite multi-directional laminated boards. problems, to achieve the effect of reducing test costs and shortening the development cycle

Inactive Publication Date: 2014-02-26
BEIHANG UNIV
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  • Application Information

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Problems solved by technology

However, at present, most of the work on the interlayer properties of composite materials is still focused on the study of composite unidirectional laminates, and little is involved in the delamination expansion law of composite multi-directional laminate interfaces.
Due to the complex failure mechanism within and between layers of multi-directional composite laminates, there are many failure modes such as fiber bridging and ply penetration expansion, and the literature available for reference is very limited. Numerical simulation of layer extension is still a challenging task

Method used

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  • Delamination propagation behavior simulation method of composite material multidirectional laminated plate on basis of cohesion model
  • Delamination propagation behavior simulation method of composite material multidirectional laminated plate on basis of cohesion model
  • Delamination propagation behavior simulation method of composite material multidirectional laminated plate on basis of cohesion model

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Embodiment Construction

[0038] like figure 1 Shown, the inventive method is specifically realized as:

[0039] 1. According to the structural parameter values ​​of composite multi-directional laminated board specimens, the geometric model of the specimen is established in Abaqus software.

[0040] Open the Abaqus software, use the three-dimensional solid modeling function, draw the corresponding geometric contour diagram of the specimen in the two-dimensional plane according to the structural parameter values ​​of the multi-directional composite laminated plate specimen, and establish the three-dimensional geometry respectively by means of solid stretching model, such as figure 2 As shown, the two parts a and c are stretched to half of the actual thickness value along the thickness direction, and part b is stretched 0.01mm along the thickness direction.

[0041] 2. Determine the key parameters that reflect the interface behavior, and set the layup angle and material properties.

[0042] Define the ...

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Abstract

The invention relates to a delamination propagation behavior simulation method of a composite material multidirectional laminated plate on the basis of a cohesion model. The method includes the following steps that (1) a geometric model is built according to structural parameters of a composite material multidirectional laminated plate test piece, (2) key parameters capable of reflecting interfacial behaviors are calculated, and material attributes are respectively set, (3) meshing is carried out on the geometric model of the composite material multidirectional laminated plate test piece, a module is assembled, and a three-dimensional finite element model is built, (4) a load and boundary conditions of the finite element model are determined according to practical situations and the load state of a composite material structure, (5) the finite element model based on the cohesion model is calculated and analyzed, a load displacement curve of a loading point is extracted, delamination propagation behaviors of the composite material multidirectional laminated plate are simulated to obtain the largest load value of the load displacement curve, and damage behaviors of the multidirectional laminated plate are predicted.

Description

technical field [0001] The invention relates to a method for simulating the delamination expansion behavior of composite material multi-directional laminated boards based on a cohesive force model, which is suitable for the research and prediction of the delamination expansion behavior of composite material multi-directional laminated boards widely used in aerospace and other fields. Background technique [0002] Advanced composite materials are currently widely used in aerospace structures, and have become the four major structural materials for aerospace together with aluminum alloys, titanium alloys, and alloy steels. Among them, carbon fiber resin-based composite materials have many advantages such as high specific strength, high specific stiffness, good corrosion resistance, good fatigue performance, and performance designability, and have become a composite material mainly used in modern aircraft structures. With the mass production of medium-modulus high-strength carb...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 赵丽滨龚愉辛安山美娟
Owner BEIHANG UNIV
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