Simple method for various creepage tests and device thereof

A simple and creep technology, applied in the direction of testing the strength of materials by applying a stable bending force, can solve the problems of high equipment cost and operating cost, not suitable for long-term creep, difficult to guarantee data accuracy, etc., and achieve low production cost , Reduce test running costs, and facilitate operation and maintenance

Inactive Publication Date: 2014-05-21
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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AI Technical Summary

Problems solved by technology

Common creep test, data accuracy is difficult to guarantee
The use of electronic universal testing machines for creep tests is easily affected by external facto

Method used

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  • Simple method for various creepage tests and device thereof
  • Simple method for various creepage tests and device thereof

Examples

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Embodiment Construction

[0022] A simple method for multiple creep tests, including the following steps:

[0023] (1) Process the experimental material into sheets according to the size required by the experiment, measure the ultimate load that the bending ratio of the experimental material can achieve through the pre-test, and select an appropriate bending load value to conduct the bending creep test;

[0024] (2) Calculate the weight required for the bending creep experiment through the principle of leverage, and calculate the mass of the loaded weight according to the weight;

[0025] (3) The experimental environment where the experimental materials are located and the device for exerting pressure on the experimental materials are set in separate spaces. After the experimental equipment in the cover is installed, connect the displacement sensor, stress sensor and temperature and humidity sensor to the computer through the data cable, and adjust the environment and humidity in the test box to the sp...

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Abstract

The invention belongs to a simple method for various creepage tests and a device thereof. According to the method, an experiment environment in which an experiment material is positioned and a device for applying pressure to the experiment material are arranged in separated spaces; the device for applying the pressure is a mechanically manual pressure applying adjustment device; force is loaded to a loading lever through a weight; the loading force is transmitted to a force transmission rod through a loading force application point by the loading lever; a pressure head on the force transmission rod applies pressure to the experiment material for experiment; a stress sensor and a displacement sensor are used for acquiring experiment data in real time and the experiment data are transmitted into a computer through a data wire; system software is used for processing the data and drawing a creepage curve. The device consists of an experiment box, an operating platform and the pressure applying adjustment device. The method disclosed by the invention can be suitable for long-time experiment, and guarantees the creepage test precision and the test running cost can be greatly lowered. The device has the advantages of simple structure, low manufacturing cost, convenience in operation and maintenance, high loading stabilization precision, low experiment cost and good effect.

Description

technical field [0001] The invention belongs to a simple method and device for various creep tests. Background technique [0002] The creep behavior of biomass materials belongs to the category of physical rheology of materials and is a kind of viscoelastic behavior of biomass materials. Other viscoelastic behaviors mainly include stress relaxation and dynamic viscoelasticity of biomass materials. As complex polymer materials, wood, bamboo, and rattan will exhibit viscoelastic behavior in the processes of molecular segment motion, molecular flow, crystallization, and molecular orientation. Studying the viscoelasticity of wood, bamboo and rattan is of great significance for the structural design of wood, bamboo and rattan products, and some basic theoretical researches in wood science and technology. [0003] As renewable biomaterials, wood, bamboo, and rattan have two different mechanisms of deformation, elastic and viscous, reflecting the comprehensive characteristics of e...

Claims

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Application Information

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IPC IPC(8): G01N3/20
Inventor 吕文华刘杏娥刘君良柴宇博郑雅娴
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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