Device and method for testing interfacial shear strength of fiber reinforced thermosetting resin composite materials

A technology of interfacial shear strength and composite materials, which is applied in the direction of measuring devices, using stable shear force to test material strength, and analyzing materials, can solve the problems of low test efficiency and difficulty in sample preparation for shear strength testing, and achieve Improve the success rate and reliability of results, simplify the structure, and improve the efficiency of experiments

Inactive Publication Date: 2016-09-07
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a fiber-reinforced thermosetting resin-based composite material interface shear strength testing device for the problems of difficult sample preparation and low test efficiency in the existing fiber-reinforced thermosetting resin-based composite material interface shear strength test and method

Method used

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  • Device and method for testing interfacial shear strength of fiber reinforced thermosetting resin composite materials
  • Device and method for testing interfacial shear strength of fiber reinforced thermosetting resin composite materials
  • Device and method for testing interfacial shear strength of fiber reinforced thermosetting resin composite materials

Examples

Experimental program
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Embodiment 1

[0032] Embodiment 1: Sisal fiber reinforced epoxy resin matrix composite material

[0033] Fiber-reinforced thermosetting resin-based composite material interface shear strength test device, including resin mold, support plate, hollow screw rod, sleeve, spring clip, bottom support plate, the hollow screw rod is rigidly connected with the support plate, the sleeve It is connected with the hollow screw rod through the internal thread, the support plate is fixed by screws and placed vertically above the bottom support plate, the resin mold is embedded in the middle of the support plate and placed on the bottom support plate, and the pitch of the hollow screw rod is 0.3 mm, the inner diameter is 0.5mm, and the resin mold is a cubic silicone rubber mold with a side length of 10mm.

[0034] Test method for interfacial shear strength of fiber reinforced thermosetting resin matrix composites:

[0035] Present embodiment adopts sisal fiber, and resin matrix is ​​E-51 normal temperatur...

Embodiment 2

[0042] Example 2: Aramid fiber reinforced vinyl unsaturated polyester composite material

[0043] Using the device described in Example 1, this example uses aramid fibers, and the resin matrix is ​​vinyl unsaturated polyester, and proceeds as follows:

[0044] (1) Connect 4 support plates with hollow screw rods by screws, and place them on the bottom support plate, connect the sleeve with the hollow screw rods, and rotate the sleeve until it touches the support plate, vertically place the resin mold Embed directly in the middle of the support plate and place it on the bottom support plate;

[0045] (2) Use a steel needle to guide the aramid fiber through the hollow screw rod and insert it vertically into the resin mold. Trim the end of the fiber with scissors. During the trimming process, the blade is close to the wall of the resin mold so that the length of the fiber embedded in the resin mold after trimming is 2mm;

[0046] (3) Use the spring clamp to clamp the other free e...

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Abstract

The invention relates to a device and method for testing interfacial shear strength of fiber reinforced thermosetting resin composite materials. The device comprises a resin die, support plates, hollow screw rods, sleeves, spring clips, and a bottom support plate; the hollow screw rods and the support plates are connected in rigid connection, the sleeves and the hollow screw rods are connected through internal screw threads, the support plates are vertically placed on the bottom support plates and fixed with screws, the resin die is embedded in the middle part of the support plates and is placed on the bottom support plate, a fiber is introduced to pass through the hollow screw rod and impale a wall of the resin die by a steel needle, a certain length of the fiber is embedded, and the spring clip clamps a free end of the fiber outside the sleeve. The testing method is based on single fiber pull-out technology, and the method comprises the following steps: fibers are embedded into the resin die, and the embedding length is regulated; resin is cast in order to prepare a testing sample; demoulding is carried out for a single fiber pull-out test, and the interfacial shear strength of the composite material is calculated. The device has a simple structure, and can be used for solving difficulties of sample preparation for the single fiber pull-out test of fiber and the like; the interface test method is convenient and rapid to operate.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a device and method for testing the interface shear strength of fiber-reinforced thermosetting resin-based composite materials. Background technique [0002] Fiber-reinforced polymer matrix composites have a series of advantages such as high specific strength, high specific modulus, fatigue resistance and corrosion resistance, and are widely used in aerospace and civil industries. Among them, plant fiber-reinforced resin-based composite materials not only have excellent mechanical properties, but also have many advantages such as heat insulation and sound absorption, green environmental protection, and biodegradability. They are particularly prominent in the fields of automobiles, building materials, and sports equipment. [0003] Fiber-reinforced resin-based composites are mainly composed of reinforcing fibers, resin matrix and the interface between the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/24G01N3/02G01N3/06
CPCG01N3/02G01N3/068G01N3/24G01N2203/0025G01N2203/0641G01N2203/0682
Inventor 李岩章中森于涛陈朝中徐捷
Owner TONGJI UNIV
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