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小木虫论坛-学术科研互动平台 » 材料区 » 无机非金属 » 交流探讨 » 耐火材料弹性模量测试
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woshisongyan

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[求助] 耐火材料弹性模量测试

静态法和动态法测试耐火材料的弹性模量，静态法测到的数值偏小，动态法测到的数值偏大，怎么解释呀？
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1楼 2012-11-25 17:58:26
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younie

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woshisongyan: 金币+10, ★★★很有帮助, 谢谢 2012-11-28 07:09:04
Static MOE is rate sensitive, and the loading rate should be given. Increasing the loading rate increases the apparent MOE, as inelastic processes are generally time-dependent, while elastic processes are time-independent.[20]
The dynamic methods measure MOE at almost zero stress and are highly accurate. Indeed, near zero stress, the MOE measurement is a truly elastic process. The dynamic MOE represents purely elastic behavior incorporating the effect of microcracks and porosity, while the intrinsic Young's modulus of a material is based on theoretical density with no microcracks. Intrinsic Young's modulus varies only with respect to composition and temperature. Intrinsic Young's modulus cannot be measured for castables, but may be estimated by the mixture rule and the intrinsic Young's modulus of each phase making up the material.[20]

http://www.ceramicindustry.com/a ... t-high-temperatures
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[url]hi.baidu.com/ceramix[/url]
2楼2012-11-26 19:14:05
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