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Equipment and Methodology for Studying the Behavior of High-Strength Steels Under Static Pressing of Plate Specimens
Strength of Materials ( IF 0.7 ) Pub Date : 2023-10-13 , DOI: 10.1007/s11223-023-00564-x
A. V. Sereda , R. V. Kravchuk , O. A. Katok , M. P. Rudnytskyi , V. V. Kharchenko

Reliable operation of products made of high-strength alloy steels is ensured by the availability of effective methods and equipment for studying their mechanical properties during manufacturing and operation. One of the most important properties of such products is resistance to impact damage. The implementation of such tests is limited by the high financial costs of manufacturing specimens and impactors (ammunition), the complexity of conducting them, recording the results, and the lack of initial data. Recently, alternative methods have been developed, such as static and dynamic pressing of plate specimens. In this case, the shape of the impactors (punches) is similar to the shape of the impactors used in punching due to similar material behavior. The pressing tests make it possible to confirm the parameters of the models of material deformation and fracture, which are necessary for numerical calculations of complex structures under various types of loads. The equipment and methodology for studying the behavior of high-strength materials under static pressing are presented. It is established that recording the punch movement using a strain gauge can significantly reduce the elastic deformation component of the power chain of the test machine and fixture loading. A series of tests were performed on specimens cut from Armox 500T steel sheets with thicknesses of 3, 5, and 10 mm for static pressing by different punches (conical, flat, and hemispherical). It was shown that the plastic properties of the material decrease with increasing thickness of rolled steel, regardless of the type of punch. The obtained results confirmed the operability of the presented equipment and methodology and can be used in numerical modeling of deformation and fracture processes of high-strength steels.



中文翻译:

研究高强度钢在板材试样静压下的行为的设备和方法

通过有效的方法和设备来研究高强度合金钢产品在制造和操作过程中的机械性能,确保其可靠运行。此类产品最重要的特性之一是抗冲击损坏。此类测试的实施受到制造样本和撞击器(弹药)的高昂财务成本、进行测试、记录结果的复杂性以及缺乏初始数据的限制。最近,已经开发了替代方法,例如板样品的静态和动态压制。在这种情况下,由于相似的材料行为,冲击器(冲头)的形状与冲压中使用的冲击器的形状相似。压制试验可以确定材料变形和断裂模型的参数,这对于复杂结构在各种载荷作用下的数值计算是必需的。介绍了研究高强度材料在静压下行为的设备和方法。经证实,使用应变仪记录冲头运动可以显着减少试验机动力链和夹具负载的弹性变形分量。对从厚度为 3、5 和 10 mm 的 Armox 500T 钢板上切下的样品进行了一系列测试,并通过不同的冲头(圆锥形、扁平形和半球形)进行静压。结果表明,无论冲头类型如何,材料的塑性性能都会随着轧制钢材厚度的增加而降低。所得结果证实了所提出的设备和方法的可操作性,可用于高强度钢变形和断裂过程的数值模拟。

更新日期:2023-10-14
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