Experimental device and method for measuring depression depth of composite material after impact

A composite material and post-impact technology, which is applied in the field of experimental devices for measuring the depth of pits after impact of composite materials, can solve the problems of difficulty in ensuring the accuracy of maximum depth information, cumbersome procedures, and heavy workload, and achieve convenient pit depth measurement Simple and precise, eliminating the effect of cumbersome procedures

Inactive Publication Date: 2016-04-13
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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Problems solved by technology

This point contact measurement method not only has cumbersome procedures and heavy workload

Method used

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  • Experimental device and method for measuring depression depth of composite material after impact
  • Experimental device and method for measuring depression depth of composite material after impact
  • Experimental device and method for measuring depression depth of composite material after impact

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Embodiment Construction

[0022] The specific structure, working principle and working process of the present invention will be further described below in conjunction with the accompanying drawings, but the protection scope of the present invention should not be limited by this.

[0023] figure 1 It is a schematic diagram of the structure principle of the test to measure the depth of the pit after the impact of the composite material. The device comprises a CCD camera 1, a support 2, an electric translation platform 3, a computer 4 and a projector 6; the CCD camera 1 and the projector 6 are arranged above the electric translation platform 3 and are fixed on the support 2; Translate left and right on the translation platform 3; CCD camera 1, electric translation platform 3 and projector 6 are connected with computer 4 through control lines.

[0024] Method provided by the invention comprises the steps:

[0025] 1) The CCD camera 1 and the projector 6 are arranged above the electric translation platfor...

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Abstract

The invention relates to an experimental device and method for the measuring depression depth of a composite material after impact, and belongs to the technical fields of experimental mechanics and non-contact optical test of composite materials. According to the method, a grid line projection measuring technology is combined with an optical triangulation technology, a CCD camera is used to shoot photos of digital grid lines projected onto a plate of the composite material before and after impact, deformation and phase change of the digital grid lines at the surface of the composite-material plate before and after impact are measured by utilizing the phase measurement technology, the depth of an impact depression of the composite-material plate after impact is measured in the full field, and the impact resistance of the composite-field plate the full-field depth information of the depression after impact are obtained. The grid line projection measuring technology used in the invention includes non-contact full-field measurement, and compared with point contact measurement methods including a vernier caliper, a height gauge and the like, tedious procedures of measuring the depths of different positions for multiple times are avoided, influence of uncertainty of the maximal depression depth is reduced, and depth measurement for the depression after impact is more convenient, simpler and more accurate.

Description

technical field [0001] The invention relates to an experimental device and method for measuring the depth of a composite material pit after impact, belonging to the technical fields of experimental mechanics and non-contact optical testing of composite materials, and in particular to an experimental device and method for measuring the depth of a composite material pit after impact. Background technique [0002] The post-impact compression test is an important means to characterize the impact resistance and interlayer performance of composite materials. It is mainly divided into two stages, one is the low-speed impact test of the falling weight under a certain energy, and the other is the compression test after impact. The maximum pit depth and pit depth distribution of composite specimens after falling weight impact are important parameters for their impact resistance and interlayer performance. At present, the main method of measuring the depth of the pit after impact of th...

Claims

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Application Information

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IPC IPC(8): G01B11/22
CPCG01B11/22
Inventor 郝文峰郭广平陈新文马丽婷邓立伟
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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