Acoustic Emission Monitoring Method for Deformation Process of Plastic Bonded Explosive Compression Molded Parts
A technology of bonded explosives and compression molding, which is applied in the field of acoustic emission monitoring and monitoring of the deformation process of plastic bonded explosives compression molded parts, can solve the problems that the application research of high polymer bonded explosives is in its infancy, and achieve reduction The number of repeated tests, accurate judgment, and the effect of avoiding the handling process
Inactive Publication Date: 2020-10-16
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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Problems solved by technology
Acoustic emission technology originally studied metal materials, so metal materials have always been a hot spot in acoustic emission research. In decades of development, acoustic emission has gradually been applied to the mechanical properties of concrete, wood, composite materials and other materials, but in The research on the application of polymer bonded explosives is still in its infancy
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[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0031] An acoustic emission monitoring method for the deformation process of a plastically bonded explosive compression molded part, comprising the following steps:
[0032] Step 1: Make a sound attenuation curve in advance on an existing sample of the same material as the inspected part.
[0033] The specific method of making the sound attenuation curve is: arrange a sensor on the surface of the sample and use the analog source to generate the acoustic emission signal at the positions of 10cm, 20cm, 30cm and above from the sensor on the sample surface, and record the sensor to detect that the analog source is at The signal amplitude at different distances, draw the sound attenuation curve according to the recorded amplitude-distance information;
[0034] Step 2: Determine the number of sensors according to the size of the inspected object, an...
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The invention provides an acoustic emission monitoring method of the demolding deformation process of a plastic bonded explosive compression formed part. The method comprises the steps as follows: anacoustic attenuation curve is produced in advance on an existing sample made of the same material with a detected part; step 2, sensors are arranged on the detected part; step 3, the size of the tested part, the sensor position and the positioning mode are determined before detection and input into detection equipment; step 4, the amplitude, event counting and a 2D positioning map are set as mainfocus objects in online monitoring, and the change of the parameters are monitored in real time; step 5, the plastic deformation process of the detected part after demolding is monitored in real time,and whether the detected part stops deformation or produces cracks is judged in real time according to the change of the acquired amplitude, event counting and area positioning count. By means of themethod, the plastic deformation process of the compression formed part in the aftertreatment process can be monitored in real time, deformation stable point diagnosis of plastic bonded explosives after demolding can be realized, and meanwhile, whether cracks are produced in the explosive part and the crack damage degree can be analyzed.
Description
technical field [0001] The invention relates to a monitoring method, in particular to an acoustic emission monitoring method for the ejection deformation process of a plastically bonded explosive compression molded part, and belongs to the technical field of acoustic emission detection. Background technique [0002] In modern weapons, polymer bonded explosives not only provide detonation energy for weapons but also need to bear a certain load, and often appear as structural parts. Therefore, the structural shape stability of polymer bonded explosives is related to the safety and effectiveness of weapons. . Modern polymer bonded explosives are mostly processed into structural parts by molding or isostatic pressing to be loaded into weapons. After the compressed explosives are ejected from the mold, they will undergo plastic deformation due to stress release. If the plastic deformation process is not over, post-processing will be carried out , the processed explosive structur...
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IPC IPC(8): G01N29/14
CPCG01N29/14
Inventor 池钰唐兴王琦孟婕胡勇马小军
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS