Partial stiffness method based composite material non-destructive detection system and detection method

A technology of non-destructive testing and composite materials, which is applied in the direction of applying repetitive force/pulsation force to test material strength, analyze materials, measuring devices, etc., and can solve problems such as structure detection of difficult composite materials
CN102759487AInactive Publication Date: 2012-10-31PEKING UNIV
1 Cites 17 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
PEKING UNIV
Publication Date
2012-10-31
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a partial stiffness method based composite material non-destructive detection system and detection method. According to the invention, a partial stiffness method and a technique capable of rapidly acquiring the partial stiffness information of samples to be tested are adopted, the stiffness information of the samples is calculated through tested contact resonance parameters, a stiffness configuration image is formed, and further the material stiffness and health state are evaluated; and from the stiffness detection of the samples to be tested, the internal mechanics information of a structure is characterized through the stiffness information of the samples to be tested. Therefore, the detection method is especially suitable for detection of thin plates of composite materials, and is a brand new non-destructive detection method, wherein the thicknesses of the thin plates are below 5mm. According to the invention, under the premise that the performances and the structure integrity of the materials are not influenced, the testing of stiffness information of the samples to be tested is completed, thus defects and destructive distribution of the structure are estimated.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the field of non-destructive testing, and in particular relates to a composite material non-destructive testing system and a testing method based on a local stiffness method. Background technique

[0002] Composite materials have the advantages of high specific strength, high specific stiffness, and designability, and have been widely used in many industrial fields. However, the performance of composite materials is severely anisotropic, and has a significant effect on sound wave attenuation; there are many types of defects in composite materials, and the more common defects include cracks, delamination, fractures, and ply wrinkles. Therefore, traditional methods are difficult. Complete the task of non-destructive testing of composite materials. Some detection methods proposed by the non-destructive testing community for the non-destructive testing of composite material structures are mainly based on ultrasonic or microwave de...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More