日本語フィールド
著者：Md. T. Islam Khan, Nagafuchi Shunichi, Mehedi Hasan題名：Structural Damage Localization by Acoustic Emission Technique発表情報：5th Asian Joint Workshop on Thermophysics and Fluid cience (AJWTF), Nagasaki, Japan ページ: 1-6キーワード：
Structural Damage, Source Location, Acoustic Emission Technique概要：抄録：Damage localization in different sensitive equipment or structures like aircraft structure or some internal flow-paths like cooling channels of atomic reactor and so on is a great challenge in NDT (non destructive testing) for their per-fect running. Therefore, getting the perfect information of damage initiation condition, damage magnitude as well as damage location becomes a challenging topic to the present scientists and engineers. Although, several methods are also trying to apply for the mentioned problem solutions, the acoustic emission (AE) technique plays an im-portant role in finding these structural damage locations or sources as NDT technique as well. It is mentioned more critically that the source location of a damage initiation is often considered as the main goal of acoustic emission technique. Principally, AE technique is applying for finding the damage source by getting the time delay of AE signal propagations. Multiple sensors are used in the system based on calculating algorithms. In the present research AE techniques with multiple sensors have been used to calculate the damage source location. A ductile cast iron speci-men was used for monitoring its damage characteristics in fatigue loading failure. AE sensors were kept attached to the specimen until its complete damage by crack developments. AE linear source location technique has been applied to identify the crack positions. Before applying the technique, a series of pencil lead breaks (PLBs) tests have been conducted upon same dimensional ductile cast iron plate for verifying the applied algorithm. According to the PLBs verifying data, the failure location of ductile cast iron (pearlite type) by the fatigue loading has been characterized. In both experiments, results of source location of structural damage have been showed clearly and successfully.英語フィールド
Author：Md. T. Islam Khan, Nagafuchi Shunichi, Mehedi HasanTitle：Structural Damage Localization by Acoustic Emission TechniqueAnnouncement information:5th Asian Joint Workshop on Thermophysics and Fluid cience (AJWTF), Nagasaki, Japan Page: 1-6Keyword：
Structural Damage, Source Location, Acoustic Emission TechniqueAn abstract：Damage localization in different sensitive equipment or structures like aircraft structure or some internal flow-paths like cooling channels of atomic reactor and so on is a great challenge in NDT (non destructive testing) for their per-fect running. Therefore, getting the perfect information of damage initiation condition, damage magnitude as well as damage location becomes a challenging topic to the present scientists and engineers. Although, several methods are also trying to apply for the mentioned problem solutions, the acoustic emission (AE) technique plays an im-portant role in finding these structural damage locations or sources as NDT technique as well. It is mentioned more critically that the source location of a damage initiation is often considered as the main goal of acoustic emission technique. Principally, AE technique is applying for finding the damage source by getting the time delay of AE signal propagations. Multiple sensors are used in the system based on calculating algorithms. In the present research AE techniques with multiple sensors have been used to calculate the damage source location. A ductile cast iron speci-men was used for monitoring its damage characteristics in fatigue loading failure. AE sensors were kept attached to the specimen until its complete damage by crack developments. AE linear source location technique has been applied to identify the crack positions. Before applying the technique, a series of pencil lead breaks (PLBs) tests have been conducted upon same dimensional ductile cast iron plate for verifying the applied algorithm. According to the PLBs verifying data, the failure location of ductile cast iron (pearlite type) by the fatigue loading has been characterized. In both experiments, results of source location of structural damage have been showed clearly and successfully.