A STUDY OF IMPACT BEHAVIORS OF Si_3N_4 CERAMICS AT ELEVATED TEMPERATURE

机译：Si_3N_4陶瓷在高温下的冲击行为研究

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The internal friction of Si_3N_4 ceramics at elevated temperature and under impact loading is investigated analytically and experimentally. A composite sphere model in the microstructure is established to describe the viscoelastic behaviors of Si_3N_4 ceramics. From this model, a two-parallel-Maxwell-body mechanical model is deduced and used to explain the test results of internal friction. The viscoelatic behaviors is studied by the method of split Hopkinson pressure bar at elevated temperatures. A method to determining the internal friction is suggested, and the internal friction of Si_3N_4 at the frequency of 7.7kHz is evaluated.

机译：通过分析和实验研究了Si_3N_4陶瓷在高温和冲击载荷下的内摩擦。建立了微结构中的复合球体模型，以描述Si_3N_4陶瓷的粘弹性行为。根据该模型，推导了两个平行的麦克斯韦体力学模型，并用来解释内部摩擦的测试结果。通过在升高的温度下使用霍普金森分压棒的方法研究了粘弹性。提出了一种确定内摩擦的方法，并对Si_3N_4在7.7kHz频率下的内摩擦进行了评估。

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来源
《Proceedings of the 2nd international symposium on impact engineering》|1996年|237-242|共6页
会议地点 Beijing(CN);Beijing(CN)
作者
Yuan Jianming; Tadashi Shioya;
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作者单位

Department of Modern Mechanics, University of Science and Technology of China, Hefei 230026, China;

Department of Aeronautics and Astronautics, University of Tokyo 7-3-1 Hongo, Bunkyo-ku, Tokyo 173, Japan;

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正文语种 eng
中图分类机械动力学;挤压;
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A STUDY OF IMPACT BEHAVIORS OF Si_3N_4 CERAMICS AT ELEVATED TEMPERATURE

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