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Stress resistance effect measuring method for material in high strain rate state

A technology with high strain rate and measurement method, which is applied in the measurement, measurement device, measurement of electrical variables, etc. of the property force of piezoelectric resistance materials, which can solve the problems of complicated operation and human error, and achieve the effect of accurate measurement data.

Inactive Publication Date: 2013-01-23
NINGBO UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

At present, the probe is used to record the time, the operation is more complicated, and human error is easy to occur

Method used

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  • Stress resistance effect measuring method for material in high strain rate state

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Embodiment Construction

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0019] A method for measuring the force resistance effect of a material in a high strain rate state, the specific steps are as follows:

[0020] Step 1: first apply the pure silver conductive paint evenly and flatly on both surfaces of the tested material 5 to form the first pure silver conductive paint layer 1 and the second pure silver conductive paint layer 2, and wait for drying;

[0021] Step 2: Fix the manganin gauge force sensor 3 on the gasket 4 with glue, then put the first pure silver conductive paint layer 1 on the tested material 5 against the gasket 4, and glue the gasket 4 with glue 6 The gap between the first pure silver conductive paint layer 1 is filled;

[0022] Step 3: Select four insulating varnish copper wires with a diameter of 0.2 mm to 0.4 mm, which are respectively the first wire, the second wire, the third wire and t...

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Abstract

The invention discloses a stress resistance effect measuring method for a material in a high strain rate state. The method comprises the following steps of: striking a gasket by using a flying plate, acquiring voltage signals of the measured material in a time period by a static and dynamic resistance measuring instrument, acquiring voltage signals of the measured material in a time period by a manganese-copper piezoresistance stress instrument, obtaining a resistance-time relationship curve and a pressure-time relationship curve of the measured material by formula conversion, and finally obtaining a pressure-resistance relationship curve. The method has the advantages of realizing measurement of dynamic stress resistance effect of the material under high strain rate and obtaining the relationship between the pressure and the resistance of the material in the high strain rate state when the load of the external environment is sharply changed.

Description

technical field [0001] The invention relates to a method for measuring material resistance, in particular to a method for measuring the resistance effect of materials in a state of high strain rate. Background technique [0002] With the rapid development of the aerospace industry, the research on new materials with lightweight materials and shielding functions continues to deepen, and scientific researchers have focused their attention on conductive polymers. After adding conductive particles to polymer materials, conductive polymers are formed. Studying their conductive properties is of great significance for studying the internal mechanism of conductive properties of materials under high strain rates. [0003] In a very short period of time, when the external impact load, sudden temperature change and other sharp changes are applied, the resistance of the material to be tested will show a very fast and large change, which is the dynamic force resistance effect of the mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R27/02G01L1/18
Inventor 雷金涛陈建康张明华马博
Owner NINGBO UNIV
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