Design method of unidirectional carbon fiber reinforced composite material
A technology of reinforced composite materials and unidirectional carbon fiber, which is applied in computer-aided design, design optimization/simulation, calculation, etc., can solve the problems of lack, sensitivity of mechanical performance differences, large parameter differences, etc., and achieve convenient design process , to ensure accuracy, to account for effects that are prone to change
Active Publication Date: 2019-09-17
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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[0008]
The purpose of the present invention is to provide a design method for unidirectional carbon fiber reinforced composite materials, which can effectively solve the existing problems of sensitivity analysis and high-performance design of CFRPs based on the sensitivity model. The main factors and the sensitivity of some parameters have not been analyzed, resulting in large differences from the actual experimental parameters and the lack of effective methods to verify the results of sensitivity analysis
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[0036] In order to make the objects and advantages of the present invention clearer, the present invention will be specifically described below in conjunction with examples. It should be understood that the following words are only used to describe one or several specific implementation modes of the present invention, and do not strictly limit the protection scope of the specific claims of the present invention.
[0037] The design method of the unidirectional carbon fiber reinforced composite material in this embodiment includes the following steps:
[0038] Step 1. Establish a mechanical performance prediction model of UD-CFRPs using the cross-scale finite element method;
[0039] Through the observation of the actual structure samples of CFRPs, the representative volume element model (RVE) of fiber bundles of UD-CFRPs was established in the form of staggered arrangement among fibers, as shown in figure 1 shown. After establishing the model and generating grid cells in the...
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The invention relates to a design method of a unidirectional carbon fiber reinforced composite material (UD-CFRPs). The design method comprises the following steps: step 1, establishing a mechanical property prediction model of UD-CFRPs by adopting a cross-scale finite element method; step 2, modeling and solving sensitivity analysis models of various mechanical property parameters of the fibers and the matrix by utilizing the input sample set and the result sample set, and verifying sensitivity indexes by adopting a variable parameter amplitude method; and step 3, based on the sensitivity analysis model in the step 2, designing different types of UD-CFRPs. According to the technical scheme, the UD-CFRPs design method based on the sensitivity analysis model is provided, capable of effectively solving the problems that in an existing design, fibers and a matrix are ignored to serve as main factors influencing the UD-CFRPs mechanical property difference, the sensitivity of some parameters is not analyzed, the difference between the parameters and actual parameters is large, and an effective method for achieving verification of a sensitivity analysis result is lacked.
Description
technical field [0001] The invention relates to the technical field of composite material (CFRPs) design, in particular to a design method of a high-performance unidirectional carbon fiber reinforced composite material (UD-CFRPs) based on a sensitivity analysis model. Background technique [0002] Carbon fiber reinforced composites (CFRPs) have been widely used in aerospace and various advanced structures due to their excellent properties such as light weight, high strength, high modulus, fatigue resistance, and corrosion resistance. Unidirectional carbon fiber reinforced composites (UD-CFRPs) are the basic components of CFRPs, and their macroscopic mechanical properties exhibit comprehensive properties through the combination of a large number of carbon fiber tows and resin matrix. The differences in the parameters of different fibers and matrix materials directly affect the mechanical properties of CFRPs. More importantly, the mechanical properties of unidirectional CFRPs...
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CPCG06F30/17G06F30/20
Inventor 齐振超刘勇王星陈文亮杨景岚肖叶鑫姚晨熙
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS