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首页> 外文期刊>Physica, C. Superconductivity and its applications >Tensile testing methods of Cu/Nb3Sn superconducting wires at room temperature
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Tensile testing methods of Cu/Nb3Sn superconducting wires at room temperature

机译：室温下Cu / Nb3Sn超导线材的拉伸试验方法

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Preliminary tests for determining the procedure of round robin test on tensile testing methods of Cu/Nb3Sn composite wires at room temperature have been conducted. Two kinds of bronze processed wires were used. The following results were obtained. (1) The initial part of the stress-strain curve was liable to be varied. Beyond the stress level of about 80 MPa, stress-strain behaviors were basically identical regardless of the gripping method and the inter-grip distance although shifts in strain axis were inevitable. Pre-loading of about 40 MPa was fairly effective for obtaining a consistent stress-strain behavior for a wire. (2) A reliable modulus of elasticity could be determined using unloading curve regardless of the unloading stress level. (3) The stress-strain curves could be expressed as a simple exponential function, which fitted the experimental data fairly well excepting initial part and was useful to determine the zero strain position of the curves. (4) The 0.2% proof stresses with a coefficient of variance of less than 5% could be obtained using the zero strain position and the modulus of elasticity. (C) 2001 Elsevier Science B.V. All rights reserved. [References: 4]
机译：进行了用于确定室温下的Cu / Nb3Sn复合线材拉伸试验方法的循环试验程序的初步试验。使用了两种青铜处理过的电线。获得了以下结果。 （1）应力-应变曲线的初始部分容易发生变化。除了约80 MPa的应力水平外，应力和应变的行为基本相同，无论采用何种夹持方法和握柄间的距离，尽管应变轴的移动是不可避免的。约40 MPa的预加载对于获得一致的线应力-应变行为相当有效。 （2）无论卸载应力水平如何，都可以使用卸载曲线确定可靠的弹性模量。 （3）应力-应变曲线可以表示为简单的指数函数，除初始部分外，拟合效果很好，有助于确定曲线的零应变位置。 （4）使用零应变位置和弹性模量可以获得0.2％的屈服应力，方差系数小于5％。 （C）2001 Elsevier Science B.V.保留所有权利。 [参考：4]

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