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摘要: 设计了基于分离式Hopkinson压杆系统(SHPB)的动态压痕实验装置,使其能够获得动态压痕实 验中试样的压痕位移和所受冲击载荷的实验数据,从而得到一种新的材料动态性能测试技术。对3种不同的 材料进行了动态压痕实验,得到了材料的动态硬度和率敏感性等动态性能,与采用其他实验技术所测得的性 能数据具有很好的一致性,并实现了利用动态压痕的方法获取材料的动态性能。Abstract: Anewtechnologyfortestingdynamicpropertiesofmaterialswasproposedbydevelopingan experimentalsetupbasedonasplit-Hopkinsonpressurebarsystem.Theexperimentalsetupcanbe usedindynamicindentationexperimentstoobtaintheindentationdisplacementsofmaterialsandthe impactloadsufferedbythem.Tovalidatetheexperimentalsetup,theABAQUS/ExplicitFEcode wasusedtonumericallysimulatedynamicindentationexperiments.Dynamicindentationexperiments wereconductedonaluminumalloyLY12,puretitaniumandoxygen-freecopper.Thedynamicpropertiessuchasdynamichardnessandratesensitivitywereobtainedforthesethreekindsofmaterials. Thedynamicpropertiesobtainedbydynamicindentationexperimentsareconsistentwiththoseby otherexperimentalmethods.
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Key words:
- solidmechanics /
- dynamichardness /
- indentation /
- SHPB /
- rate-sensitivity
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