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兩種Al2O3結(jié)構(gòu)陶瓷斷裂強(qiáng)度的統(tǒng)計(jì)分析
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TQ174.758

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西北工業(yè)大學(xué)“雙新計(jì)劃”資助項(xiàng)目,航空科學(xué)基金!(97H5 310 2 )資助項(xiàng)目


Statistical Analysis of Fracture Strength for Two Kinds of Al_2O_3 Structural Ceramics
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    摘要:

    研究了結(jié)構(gòu)陶瓷材料的統(tǒng)計(jì)分布規(guī)律。首先通過實(shí)驗(yàn)測(cè)試了兩種Al2O3陶瓷光滑試件和不同缺口半徑試件的斷裂強(qiáng)度;對(duì)實(shí)驗(yàn)數(shù)據(jù)用正態(tài)分布和Weibull分布分別進(jìn)行了分析,發(fā)現(xiàn)對(duì)于缺口件,用正態(tài)分布描述其斷裂強(qiáng)度分散性要比Weibull分布好一些。這也說明在對(duì)陶瓷材料結(jié)構(gòu)件進(jìn)行設(shè)計(jì)時(shí),應(yīng)考慮用正態(tài)分布表述其斷裂強(qiáng)度的分散性和存活概率。

    Abstract:

    The failure stress of two kinds of alumina with six different notch radii were tested. Statistical analysis of the fracture strength indicates that although the fracture strength of smooth specimens conforms to a Weibull distribution, the fracture strength of notched specimen conforms to a normal distribution. The test results show that fracture toughness of structural ceramics also conforms to normal distribution.Therefore the normal distribution will be adopted as reliability design is applied to structural ceramics.

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王峰會(huì) 鄢君輝.兩種Al2O3結(jié)構(gòu)陶瓷斷裂強(qiáng)度的統(tǒng)計(jì)分析[J].稀有金屬材料與工程,2000,(5):311~314.[Wang Fenghui, Yan Junhui, Wang Hong. Statistical Analysis of Fracture Strength for Two Kinds of Al_2O_3 Structural Ceramics[J]. Rare Metal Materials and Engineering,2000,(5):311~314.]
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