Strength Prediction Method of Composite Laminates with Hole Delamination 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
CN112906263BActive Publication Date: 2022-06-28TIANJIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TIANJIN UNIV
Publication Date
2022-06-28

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Abstract

The invention discloses a method for predicting the strength of a composite material laminated plate containing hole-making delamination damage. The main steps are: establishing the constitutive model of the inner unit and the interlayer unit of the composite material; using the VUMAT interface of ABAQUS to complete the inner unit and the interlayer unit of the composite material Write the constitutive model of the interlayer unit; establish the finite element model of the complete composite laminate and the composite laminate with delamination defects; establish boundary conditions for the laminate model, apply loads, and calculate the two models in ABAQUS The load-displacement curve and the overall damage value cloud map of the load application position. The invention can effectively predict the influence of different delamination defects on the strength of composite material laminates, has certain guiding significance for further establishing a reasonable hole-making quality evaluation index, and establishes a mapping relationship between hole-making technology and service performance.
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Description

technical field

[0001] The invention relates to a technology in the field of composite material detection, in particular to a method for strength prediction and damage analysis of a fiber-reinforced composite material 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, and the extensive use of carbon fiber reinforced composite materials can optimize the weight of the aircraft structure 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 si...

Claims

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