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共晶復(fù)相陶瓷細(xì)觀結(jié)構(gòu)對抗沖擊強(qiáng)度的影響
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作者單位:

1.陸軍工程大學(xué)石家莊校區(qū) 車輛與電氣工程系;2.陸軍步兵學(xué)院;3.解放軍71901部隊(duì)

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中圖分類號:

O34

基金項(xiàng)目:

國家自然科學(xué)基金項(xiàng)目（面上項(xiàng)目，重點(diǎn)項(xiàng)目，重大項(xiàng)目）


Inherent Relationship between Microstructure Parameters and Anti-impact Strength of Eutectic Composite Ceramic
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Affiliation:

1.Department of Vehicle and Electric Engineering,Army Engineering University;2.Army infantry College;3.71901 troops of PLA

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    摘要:

    通過共晶復(fù)合陶瓷的細(xì)觀強(qiáng)度和動(dòng)態(tài)破壞準(zhǔn)則建立起微觀結(jié)構(gòu)參數(shù)與抗沖擊強(qiáng)度間的內(nèi)在關(guān)系。首先,根據(jù)共晶復(fù)合陶瓷的微觀特征,用相互作用直推法和有效簡化算法獲得復(fù)合陶瓷的有效應(yīng)力場。然后,應(yīng)有等效夾雜法和Griffith 微裂紋擴(kuò)展理論預(yù)報(bào)了共晶復(fù)合陶瓷的細(xì)觀力學(xué)強(qiáng)度。進(jìn)而,應(yīng)用統(tǒng)一壓剪理論建立沖擊區(qū)的動(dòng)態(tài)破壞準(zhǔn)則。最后,應(yīng)用與微觀結(jié)構(gòu)相關(guān)的動(dòng)態(tài)破壞準(zhǔn)則建立沖擊強(qiáng)度計(jì)算模型。定量分析了微觀結(jié)構(gòu)參數(shù)對沖擊強(qiáng)度的影響,結(jié)果表明：共晶體間界面缺陷尺寸越小及共晶體剛度越大,抗沖擊強(qiáng)度越大。

    Abstract:

    The inherent relationship between the microstructure parameters and anti-impact strength is established by micromechanical strength and dynamic destruction criterion of eutectic composite ceramic. Firstly, in line with the microstructure characteristic of eutectic composite ceramic, the effective stress field of composite ceramic is computed by the interaction direct derivative estimate and sufficiently simplified calculation method. Secondly, according to equivalent inclusion method and Griffith micro-crack propagation theory, the micromechanical strength of eutectic ceramic composite is predicted. Thirdly, the dynamic destruction criterion of the comminuted zone is built by the unified pressure shear criterion. Finally, on account of the dynamic destruction criterion which is associative with microstructure, the calculated mode of anti-impact strength is obtained. The influence of microstructure parameters on anti-impact strength is quantitatively analyzed. Results show that decrease in interface defect size among eutectic grains and increase in eutectic grain stiffness will increase anti-impact strength.

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倪新華,于金鳳,劉協(xié)權(quán),杜志鴻,徐達(dá).共晶復(fù)相陶瓷細(xì)觀結(jié)構(gòu)對抗沖擊強(qiáng)度的影響[J].稀有金屬材料與工程,2019,48(9):2808~2814.[Ni Xinhua, Yu Jinfeng, Liu Xiequan, Du Zhihong, Da Xu. Inherent Relationship between Microstructure Parameters and Anti-impact Strength of Eutectic Composite Ceramic[J]. Rare Metal Materials and Engineering,2019,48(9):2808~2814.]
DOI：10.12442/j. issn.1002-185X.20180370

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歷史
  • 收稿日期:2018-04-12
  • 最后修改日期:2018-05-03
  • 錄用日期:2018-05-21
  • 在線發(fā)布日期: 2019-10-09
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