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=Method for calculating elastic modulus of needled C/C composite material

A composite material and elastic modulus technology, which is applied in the field of composite material and mechanical performance testing, can solve problems such as the inability to accurately and efficiently calculate the elastic properties of composite material parts, which is not conducive to the engineering application of acupuncture C/C composite materials, error fluctuations, etc. , to achieve the effect of avoiding low versatility, avoiding large errors in calculation results, and reducing errors

Active Publication Date: 2018-12-21
BEIHANG UNIV
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Problems solved by technology

It can be known that for acupuncture C / C composites manufactured by different processes, the error between the calculation results obtained by applying the calculation method of the mixture ratio of acupuncture C / C composites also fluctuates greatly, so the generality of the calculation is relatively low. Low, it is impossible to accurately and efficiently calculate the elastic properties of composite parts in practical applications, which is not conducive to the engineering application of needle-punched C / C composites

Method used

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  • =Method for calculating elastic modulus of needled C/C composite material
  • =Method for calculating elastic modulus of needled C/C composite material
  • =Method for calculating elastic modulus of needled C/C composite material

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Embodiment Construction

[0021] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0022] The present invention proposes a method for calculating the elastic modulus of acupuncture C / C composite materials. The calculation method is based on the calculation method of the mixing ratio of acupuncture C / C composite materials, and uses the Halpin-Tsai calculation model and the Gox equation to establish the acupuncture C / C composite material. The elastic modulus correction calculation model of C composite materials is used to study the elastic properties of acupuncture C / C composite materials, which solves the problems of large errors and low versatility caused by the calculation of elastic properties by using existing calculation methods, and realizes the accuracy of acupuncture C / C composite materials. / C Composite Elastic Modulus Accurate Calculation.

[0023] like figure 1 As shown, needle-punched C / C composites are different from or...

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Abstract

A method for calculate elastic modulus of needled C / C composite material belong to that technical field of composite material and mechanical property testing. The method specifically comprises the following steps: step 1, establishing a correction calculation model of elastic modulus of needled C / C composite material; 2, respectively obtaining a stiffness matrix of each fiber bundle layer and a stiffness matrix of each net tire layer; 3, obtain that elastic modulus of a needled C / C composite lay; 4, respectively obtain that elastic modulus of three needled C / C composite layer, substituting theelastic modulus of the three needled C / C composite layers into a finite element calculation model, and obtain the elastic modulus of the needled C / C composite. The calculation method of the inventionimproves the accuracy of the elastic modulus calculation result, reduces the error of the elastic modulus calculation result, and has high versatility.

Description

technical field [0001] The invention belongs to the technical field of composite materials and mechanical performance testing, and in particular relates to a method for calculating the elastic modulus of needle-punched C / C composite materials, which is mainly used in the analysis and prediction of elastic properties of needle-punched C / C composite material parts. Background technique [0002] Needle-punched C / C composite material is a composite material formed by combining a prefabricated body with a special structure as a reinforced prefabricated body and a matrix. The reinforced prefabricated body is composed of fibers, specifically by performing relay needle punching on alternately stacked fiber bundle layers and mesh layers, relying on the relay needles to interrupt and bring the unidirectional long fibers in the fiber bundle layers and mesh layers to the In the Z direction, needle-punched fiber bundles perpendicular to the fiber bundle layer are produced. The needle-pun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G01N3/40
CPCG01N3/40G06F30/23Y02T90/00
Inventor 张建伟安培钊
Owner BEIHANG UNIV
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