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Corn kernel Poisson's ratio determining method

A measurement method, Poisson's ratio technology, applied in the direction of applying stable tension/pressure to test the strength of materials, etc., can solve problems such as unseen measurement methods, and achieve reliable measurement results, low production costs, and simple operation steps.

Inactive Publication Date: 2013-05-08
GANSU AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In China, there are few reports on corn kernel modeling and Poisson’s ratio determination. In 2007, Li Xinping, Gao Lianxing, etc. directly determined the corn kernel’s Poisson's ratio, there is no specific measurement method in the relevant literature

Method used

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  • Corn kernel Poisson's ratio determining method
  • Corn kernel Poisson's ratio determining method
  • Corn kernel Poisson's ratio determining method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: a kind of corn grain Poisson's ratio assay method comprises the following steps:

[0021] 1) Selection of test materials: The test materials used are corn grains to be tested, computer-controlled electronic universal testing machine, grain moisture meter, vernier caliper with a resolution of 0.01mm, static strain tester, resistance strain gauge, 240-360 mesh series sandpaper, Quick-drying glue, wires, electric soldering iron, etc.

[0022] 2) Preparation of corn grain samples to be tested: use a grain moisture meter to measure the moisture content of corn grains, measure the corn grains with a vernier caliper, and select corn grains with a length of about 14mm, a width of about 11mm, and a thickness of about 5mm for the sample make. Use 240-mesh and 320-mesh sandpaper to roughly grind the selected corn kernels, and then apply 360-mesh sandpaper for fine grinding, and grind the corn kernels into a rectangular sample of 9mm×9mm×3mm.

[0023] 3) Determinati...

Embodiment 2

[0033] Embodiment 2: the axial compression load of the described microcomputer-controlled electronic universal testing machine to the corn grain sample is 60.2N; the axial loading speed of the described microcomputer-controlled electronic universal testing machine is 1.5mm / min; the described corn The Poisson's ratio of the kernels should be the average value of the Poisson's ratios of the corn kernels calculated for each compressive load under the loading speed of the indenter head of 1.5 mm / min, and the rest are the same as in Example 1.

Embodiment 3

[0035] Embodiment 3: the axial compression load of the described microcomputer-controlled electronic universal testing machine to the corn grain sample is 90.3N; the axial loading speed of the described microcomputer-controlled electronic universal testing machine is 2.0mm / min; the described corn The Poisson's ratio of the grains should be the average value of the Poisson's ratios of the corn grains calculated for each compressive load under the loading speed of the indenter head of 2.0 mm / min, and the rest are the same as in Example 1.

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Abstract

The invention relates to the technical field of modern agriculture testing, and particularly relates to a corn kernel Poisson's ratio determining method which comprises the following steps of: preparing a to-be-determined corn kernel sample; fixing a determining strain gage; welding a lead with the strain gage; and determining a strain value of loading and compressing the to-be-determined sample. The corn kernel Poisson ratio determining method has the advantages of simple and convenient operation steps, scientific measurement principle, reliable Poisson ratio measurement result and low production cost.

Description

technical field [0001] The invention relates to the technical field of modern agricultural testing, in particular to a method for measuring the Poisson's ratio of corn grains. Background technique [0002] In recent years, with the continuous development of agricultural science and technology, many scholars at home and abroad have applied the finite element method to study the mechanical properties of agricultural materials. It is of great significance to use the finite element method to simulate the loading process of fruits, vegetables and crop seeds, and to analyze their micromechanical properties and damage rules. Therefore, the selection of each characteristic parameter value in the process of modeling agricultural materials will directly affect the correctness of the simulation results. In China, there are few reports on corn kernel modeling and Poisson’s ratio determination. In 2007, Li Xinping, Gao Lianxing, etc. directly determined the corn kernel’s Poisson's rati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08
Inventor 张锋伟戴飞赵武云赵财薛晓峰张克平康瑾王丽娟张华
Owner GANSU AGRI UNIV