Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第24卷    第11期    总第188期    2014年11月

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文章编号:1004-0609(2014)11-2762-07
钨纤维增强锆基块体非晶复合材料的黏弹性响应
廖光开,龙志林,杨 妙,陈舒敏,邹 萍

(湘潭大学 土木工程与力学学院,湘潭 411105)

摘 要: 基于均匀化理论建立了计算具有微观周期性结构的钨纤维增强锆基块体非晶复合材料的黏弹性力学模型;结合有限单元法在拉氏域中计算了该复合材料的等效松弛模量,用最小二乘法拟合得到用Prony级数表示的松弛模量;并进一步得到拉氏域中的蠕变柔量;然后进行拉氏逆变换,得到时间域内的等效复合模量和蠕变柔量;分析了钨纤维体积分数对复合材料等效黏弹性能的影响。结果表明,将均匀化理论与有限元方法相结合能有效地预测具有微观周期性结构的钨纤维增强锆基块体非晶复合材料的黏弹性能,进而有效地优化该类复合材料性能。

 

关键字: 块体非晶合金复合材料;均匀化理论;有限元分析;黏弹性能

Viscoelastic response of tungsten fiber reinforced Zr-based bulk metallic glass matrix composites
LIAO Guang-kai, LONG Zhi-lin, YANG Miao, CHEN Shu-min, ZOU Ping

College of Civil Engineering and Mechanics, Xiangtan University, Xiangtan 411105, China

Abstract:Based on the homogenization theory, a mechanical model to calculate the viscoelastic properties of tungsten fiber reinforced Zr-based bulk metallic glass matrix composites (W/Zr-BMGMCs) with periodic microstructure was formulated. The equivalent relaxation modulus of this composite material was then calculated in the Laplace domain combined with the finite element method. The creep compliance in the Laplace domain can be further achieved through the relaxation modulus expressed by Prony series fitted with the method of least squares. Consequently, equivalent composite modulus and creep compliance in the time domain can be obtained by means of inverse Laplace transform Laplace inverse transform Laplace inverse transform Laplace inverse transf. The effects of the volume fraction of tungsten fiber on the equivalent viscoelastic properties of (W/Zr-BMGMCs) were further studied. The results demonstrate that a combined approach of the homogenization theory and the finite element formulation can effectively anticipate the viscoelastic properties of (W/Zr-BMGMCs) with periodic microstructure, and thus provide basis for effective optimization of this kind of composites.

 

Key words: bulk metallic-glass matrix composite; homogenization theory; finite element analysis; viscoelastic property

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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