不同屈服点金属复合材料力学和阻尼性能研究
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摘要
根据材料塑性耗能原理提出了不同屈服点复合材料的构想,提出了不同屈服点金属复合材料的力学模型及阻尼比计算公式;通过单向拉伸试验和单向往复加载卸载拉伸试验分别研究了不同屈服点复合材料的力学行为和阻尼性能,并验证了理论计算公式。通过理论计算和试验结果可以得出:不同屈服点复合材料在弹性阶段时,由于低屈服点金属发生塑性变形可以有效吸收地震能量,而高屈服点金属仍处与弹性阶段,可以保证结构的强度。
Conception of different yield composite material is put forward in this paper according to the theory of plastic energy consumption. Meanwhile this paper gives the mechanical model and the damp formula of the different yield composite material, and then the mechanical behavior and the damping performance of this new composite material by tension test and reciprocation tension test. Based on the theory and experiment we can concluded that when the strain is in the elastic stage, the different yield material can absorb the earthquake energy because of the plastic strain of the low yield metal, while in this stage, the high yield can keep the structure integrality.
Conception of different yield composite material is put forward in this paper according to the theory of plastic energy consumption. Meanwhile this paper gives the mechanical model and the damp formula of the different yield composite material, and then the mechanical behavior and the damping performance of this new composite material by tension test and reciprocation tension test. Based on the theory and experiment we can concluded that when the strain is in the elastic stage, the different yield material can absorb the earthquake energy because of the plastic strain of the low yield metal, while in this stage, the high yield can keep the structure integrality.
引文
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[2 ] Kemp A R. Designing for ductility [ J ]. Structural Engineer, 2003, 81(6) : 13-14
[3] Nelson L, John W, Graham H. Ductility reduction factor in the seismic design of buildings [ J ]. Earthquake Engineering& Structures Dynamics,1998, 27(7) : 749-769
[4] 高慧婷,刘勇兵,包晓军,等.开发Fe/Zn抗震复合材料的构想[J].材料科学与工艺,2004,12(2) :220-224
[5] 包晓军,刘勇兵,曹占义,等.抗震复合材料的单向拉伸与循环变形行为[J].材料科学与工艺,2005,13(5) :163-16
[6] 束德林.金属力学性能[M].机械工业出版社,1999
[7] 欧阳国恩,欧阳荣.复合材料实验技术[M].武汉工业大学出版社,1993
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