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首页> 外文期刊>Applied Sciences >The Role of Overloading on the Reduction of Residual Stress by Cyclic Loading in Cold-Drawn Prestressing Steel Wires
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The Role of Overloading on the Reduction of Residual Stress by Cyclic Loading in Cold-Drawn Prestressing Steel Wires

机译:冷拔预应力钢丝中过载对循环载荷降低残余应力的作用

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Prestressing steel wires are commonly used as reinforcement elements in structures bearing fatigue loads. These wires are obtained by a conforming process called cold drawing, where a progressive reduction of the wire diameter is produced, causing residual stress in the commercial wire. The aim of this paper is to analyze the effect of diverse in-service cyclic loading conditions (cyclic loading and cyclic loading with overload) on such a residual stress field. To achieve this goal, firstly, a numerical simulation of the wire drawing process of a commercial prestressing steel wire was carried out to reveal the residual stress state induced by the manufacture technique. Afterwards, a numerical simulation was performed of the in-service loading conditions of a prestressing steel wire in which the previously calculated residual stress state is included. The analysis of the obtained results shows a significant reduction of the residual stress state of about 50% for common in-service loadings and as high as 90% for certain cases undergoing overloads during cyclic loading. Therefore, an improvement of the mechanical performance of these structural components during their life in-service can be achieved.
机译:预应力钢丝通常在承受疲劳载荷的结构中用作增强元件。这些线材通过称为冷拔的整形工艺获得,该工艺会逐渐减小线材直径,从而在商用线材中产生残余应力。本文的目的是分析各种在役循环载荷条件(循环载荷和超载循环载荷)对这种残余应力场的影响。为了实现这个目标,首先,对商用预应力钢丝的拉丝过程进行了数值模拟,以揭示制造技术引起的残余应力状态。然后,对其中包括先前计算的残余应力状态的预应力钢丝的在役载荷条件进行了数值模拟。对获得的结果的分析表明,对于常见的在役载荷,残余应力状态显着降低了约50%,对于在循环载荷过程中发生过载的某些情况,残余应力状态显着降低了90%。因此,可以提高这些结构部件在其使用寿命中的机械性能。

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