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Measuringm ethod and device for fiber material transverse compression property

A technology of lateral compression and measurement method, which is applied in the field of micro-measurement, can solve the problems of reduced fiber layer thickness, small fiber lateral compression displacement, and increased fiber contact area, and achieves reduced measurement error, accurate and convenient adjustment, and device structure compact design effect

Inactive Publication Date: 2005-03-02
DONGHUA UNIV
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] There are several difficulties in the measurement of fiber transverse compression properties: first, the transverse compression displacement of fibers is small, and how to accurately control and measure the small compression amount when the fiber diameter is generally 10-30 μm; second, not only the thickness of the fiber layer decreases during the compression process, but also the fiber How to observe biaxially (thickness and width) at the same time as the contact area increases; Third, in practical applications, the fibers are overlapped and arranged at a certain angle, so it is necessary to design and control samples with different overlapping angles in performance measurement. Accurate overlapping arrangement and observation

Method used

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  • Measuringm ethod and device for fiber material transverse compression property
  • Measuringm ethod and device for fiber material transverse compression property
  • Measuringm ethod and device for fiber material transverse compression property

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Embodiment Construction

[0063] The following practical operations and examples will help to understand the present invention, but do not limit the content of the present invention.

[0064] a) Typical measurement operation, first prepare the fiber layer sample, take out the single fiber from the fiber bundle, and wind it on the polygonal disc 51, the central hole of the polygonal disc is a hollow circle with a diameter of 2 to 3 cm, such as figure 2 As shown, it can be a square disc, a hexagonal disc, an octagonal disc, etc., the fibers are straightened along the diagonal or opposite sides, and the double-sided adhesive tape 72 is attached to fix it. image 3 Cut the fiber at a certain angle at the dotted line in the middle, and use the angle positioning function of the octagonal disc to complete the precise angle overlapping fiber positioning such as Figure 4 , the fibers are at an angle of θ (0° to 90°) overlapping angle sample 73, a sample 74 with multiple fibers arranged at intervals such as ...

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Abstract

The invention relates to lateral compression performance measuring method and device of fibrous material, comprising the parts of fiber lateral cimpression element using pressure head on cantilever beam to lateral compress filament and overlapping fiber sample in multiangular tray, fiber deformation observing parts using two objectives with different direction finish stereo-observation and measurement to compressed fiber, compressive stress measuring elements with deflection correction to put in real time change of stress of pressure head in computer and the deflection correction is to correct vertical compressed displacement by small deflection deflection of cantilever beam when laser reflects measuring compression. By using multiple measurement of stress and conformational change and compact and novel design, lateral compression shape measurement is fast, accurate, overall, its measurement error has decreased greatly and the method is suitable for various kinds of fibrous material.

Description

Technical field: [0001] The invention relates to a method and device for measuring transverse compressive properties of fibrous and tubular materials. More specifically, the present invention relates to a method and device for measuring transverse compressive properties of flexible fiber materials, belonging to the field of micro-measurement. Background technique: [0002] In the study of fiber materials, the measurement of the transverse compressive properties of fibers, especially the compressive properties of overlapping fibers, has important practical significance for the safety of the actual use of fiber products and structural design. appear particularly prominent. [0003] There are many studies on the axial tensile properties of fibers and fiber bundles, and some studies on axial compression (Yu Weidong, Liu Yuqing, Han Lu, Method and device for measuring fiber compression bending properties, Chinese invention patent, application number 200310109512.3) and the same ...

Claims

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Application Information

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IPC IPC(8): G01C3/00G01C11/00G01N3/08
Inventor 于伟东刘宇清韩露
Owner DONGHUA UNIV
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