Egg shell material parameter nondestructive testing device and testing method

Abstract

The present invention discloses an egg shell material parameter nondestructive testing device and testing method, the egg shell in the testing device comprises a big end and a small end, the small end of the egg shell is provided with an upper flat plate, a lower flat plate is mounted below the big end of the egg shell, the equator of the egg shell is uniformly provided with at least two strain sheets alternate and along the warp and weft directions, and each strain sheet is connected with a signal acquisition system. Through the egg shell material parameter nondestructive testing method, only elastic modulus and Poisson's ratio of one point on the equator area of the egg shell are tested, the influence brought about by the uneven thickness can be eliminated, the obtained measured value is more precise, the accuracy of the elastic modulus and Poisson's ratio and the true values is improved, the eggshell is overall compressed and tested without cutting process, local error brought by cutting can be avoided, the integrity of the egg shell is ensured, and the implementation of the follow-up mechanics tests of the egg shell can be facilitated.

Description

technical field [0001] The invention relates to a non-destructive test device and a test method for eggshell material parameters, belonging to the field of mechanical design. Background technique [0002] The elastic modulus and Poisson's ratio are the basic physical parameters to measure the mechanical properties of materials, and they are the prerequisites for analyzing the strength and stability of eggshells and ensuring the safe transportation of eggs. Most of the existing tests are aimed at metal materials and composite materials, which are made into dumbbell-shaped samples, and then their mechanical parameters are measured by a tensile testing machine. As a complete organism, the eggshell cannot be made into a dumbbell-shaped sample, so the elastic modulus and Poisson's ratio cannot be measured by conventional methods. [0003] In the 2009 standard "CompressionTestofFoodMaterialsofConvexShape" of the American Society of Agricultural and Biological Engineering, eggshel...

AI Technical Summary

Problems solved by technology

Although the elastic modulus and Poisson's ratio of the eggshell were tested to overcome the defects caused by the ASAE specification to a certain extent, the eggshell was often damaged during the test, and it was impossible to ensure that the eggshell was intact. The measurement of mechanical parameters will affect the implementation of subsequent mechanical tests on eggshells; in addition, the cutting of eggshells will cause local damage to the ring sample, resulting in large errors in measurement results

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