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摘要: 利用?37mm 火炮加载装置,在平板撞击下,以含预制内部缺陷的K9玻璃作为实验样品,采用具 有高空间-时间分辨率的阵列式多普勒探针测量技术(空间和时间分辨率分别为127m 和50pm),测到了样 品后界面不同位置的粒子速度。简略分析了材料内部缺陷对样品自由面粒子速度信号的影响,探索了从细- 微观尺度研究材料动态力学性能的实验方法。Abstract: Studyonthedynamicpropertyofmaterialsunderimpactloadingdependscloselyontheprogressofexperimentaltestingtechniques. Thepowergunwitha37-mm-diameterchamberwasusedas theloadingequipment,andK9glasswithinternalpreexisteddefectswaschosenasthesample.Under plateimpactingconditions,Dopplerpinssystem (DPS)testingtechnique,whosespaceandtimeresolutionswere127mand50psrespectively, wasadoptedtomeasurethevelocityhistoryoffreesurfaceslocatedindifferentplacesonsamplesfreesurface. Influenceofinternalpreexisteddefectson thevelocitysignalofsamplesfreesurfacewasanalyzedinbrief,andtheexperimentalmethodto studymaterialsdynamicpropertyfromthepointofmeso-microcosmicviewwasalsodiscussed.
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Key words:
- solidmechanics /
- dynamicmechanicalproperties /
- Dopplerpinssystem /
- K9Glass
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