Acoustic Emission testing

Acoustic emission detection in wood drying and wood industry

Update time：2013-04-16 15:22　　　 Viewed：次

Woodiness material will release strain energy in the form of elastic wave when generating deformation or fracture because of external or internal force.
By making use of acoustic emission signal electronic instrument strain reflects, woodiness material internal precursor information such as cracks, defects, structure change and destruction indications can be judged.

Due to the characteristics of acoustic emission in itself, it has been used in the field of wood science, such as acoustic emission process of wood drying, wood acoustic emission in the stretching process, the acoustic emission in the process of cutting wood; But under the condition of dynamic force for wood material internal realtime acoustic emission signal space evolution characteristics system indepth study, using the acoustic emission testing technology of woodiness material under the condition of bending test the dynamic performance research has not been reported. And to carry on the dynamic of the wood, the reliability of the nondestructive evaluation is an important content of wood nondestructive testing, also is the important basis of wooden structure material design for; And, like stress, strain parameters, acoustic emission parameter should also belongs to a measurable material constitutive parameters, can be used to assess, inference, and simulate the change of its internal structure. Therefore, as a dynamic nondestructive testing technology, acoustic emission is a kind of important means of monitoring and forecasting wood’s stability under the condition of stress; With more and more wooden materials are used as structure materials, it is very meaningful to detect the integrity of the wood components under dynamic loads and use safety by using acoustic emission technology,
(Editor：admin)

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