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大温差下混合式陶瓷球轴承的结构匹配性设计 被引量:4
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作者 王黎钦 王瑜 +1 位作者 高云峰 齐毓霖 《机械科学与技术》 CSCD 北大核心 1998年第4期544-547,共4页
考虑混合式陶瓷球轴承元件之间和轴、轴承座材料之间的差异,以及过盈安装条件的影响等,推导了轴承与轴及轴承座之间过盈量对轴承游隙的影响公式;推导了大温差条件下轴承元件的约束热变形及对轴承游隙的影响公式,给出了大温差条件下... 考虑混合式陶瓷球轴承元件之间和轴、轴承座材料之间的差异,以及过盈安装条件的影响等,推导了轴承与轴及轴承座之间过盈量对轴承游隙的影响公式;推导了大温差条件下轴承元件的约束热变形及对轴承游隙的影响公式,给出了大温差条件下工作的混合式陶瓷轴承的结构匹配性设计步骤。文章最后用实例说明了匹配性设计的必要性。 展开更多
关键词 混合式 陶瓷轴承 配合变形 设计 轴承
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Permanent deformation response parameters of asphalt mixtures for a new mix-confined repeated load test 被引量:2
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作者 廖公云 杨毅文 +1 位作者 黄晓明 向晋源 《Journal of Central South University》 SCIE EI CAS 2013年第5期1434-1442,共9页
The main objective of this work is to propose new mixture response parameters and to compare correlations with rut depths and sensitivity of permanent deformation response parameters based on field extracted cores and... The main objective of this work is to propose new mixture response parameters and to compare correlations with rut depths and sensitivity of permanent deformation response parameters based on field extracted cores and lab-mixed duplicates. A new "mix-confined" test is developed and four new parameters for this test are proposed. Correlation coefficients with rut depths and coefficients of variation (sensitivity) are compared between the four new and two existing parameters. Some parameters are recommended to be used for the newly developed test. The results show that, newly developed test can capture the changes of permanent deformation of asphalt mixtures. Only one new parameter (D1 of Stephen Price model) and one existing parameter (flow number, Fn ) have strong correlations with rut depths of asphalt pavements (R2 greater than 0.7) and have relative small sensitivity (coefficient of variation, COV, less than 30%). For polymer modified asphalt mixtures, the parameter D1 rather than Fn should be used. These findings can be used to check the permanent deformation of asphalt mixture during the mix design. 展开更多
关键词 mixture response parameters permanent deformation asphalt mixture mix-confined test correlation coefficient sensitivity
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Application of the O-line model to martensite crystallography
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作者 GU XinFu ZHANG WenZheng 《Science China(Technological Sciences)》 SCIE EI CAS 2012年第2期464-469,共6页
The O-line model is usually applied to precipitation crystallography.Its application to investigation of martensite crystallography has received little attention.In this paper,the relationship between O-line model and... The O-line model is usually applied to precipitation crystallography.Its application to investigation of martensite crystallography has received little attention.In this paper,the relationship between O-line model and the prism matching model for martensite crystallography is established.The formulas in the O-line model are applicable to martensite crystallography.Analytical solution of the habit plane corresponding to the minimum shape strain has been derived.A calculation example of {3 10 15}f martensite in a ferrous alloy is provided.While the results are in agreement with the former models for martensite crystallography,the advantage of O-line model is that it offers analytical solutions,facilitating further systematic investigations. 展开更多
关键词 habit plane O-line model martensite crystallography PTMC
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