LY12CZ鋁合金三點彎曲損傷的聲發射監測
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本文采用聲發射技術對LY12CZ鋁合金試樣三點彎曲損傷斷裂過程進行監測，探索聲發射技術在金屬構件斷裂損傷研究中的應用。介紹了信號采集系統，提供了硬件系統常用的降噪措施。試驗分恒定載荷和加載速率為定值兩類情況進行，分析了試樣在不同情況下的聲發射監測試驗結果。
MONITORING OF DURALUMIN LY12CZ THREE-POINT-BENDING FRACTURE PROCESS WITH AE TECHNIQUE
Gao Chengqiang Wang hangong Yang Nengjun Liu Xiaofang
(Secton 501 of the Second Artillery Engineering College, Xi’an, 710025)
Abstract: Based on the analysis of the AE experiment, which monitored the LY12CZ duralumin sample’s three-point-bending fracture process, the paper probed into the application of acoustic emission technique to studying the metal component damage. Signal acquisition system is presented and common denoise methods of hardware system are supplied. The experiment is conducted in two cases, one with constant load and another with constant loading rate. Experiment results of acoustic emission monitoring of different cases are analyzed.
Keywords: Duralumin，Acoustic Emission，Noise，Three-point-bending
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B=12mm，高度W=24mm，長度L=120mm，預制裂紋a=9mm，試驗跨度S=100mm。
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[5]；但達到臨界狀態后，由于沒有更多的能量儲存，使得裂縫擴展呈失穩狀態，出現連續和迅速的聲發射。
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