微射流冷却对起重机保险杠碰撞应力集中的影响分析

IF 0.5 Q4 TRANSPORTATION SCIENCE & TECHNOLOGY

Transport Problems Pub Date : 2023-06-30 DOI:10.20858/tp.2023.18.2.09

T. Haniszewski, T. Wȩgrzyn, B. Szczucka-Lasota

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引用次数: 0

摘要

在起重机保险杠的结构中，需要连接各种类型的钢。通常，低合金钢结构用于此目的，可以用S355J2钢来表示。S355J2低合金钢的抗拉强度略低于600MPa，在环境温度下S355J2钢的抗拉强度处于200J的高水平。这种钢在负温度下的冲击强度在-60°C时也达到了47 J以上，因此它符合第六级冲击韧性。在传统的气体保护焊（GMAW）工艺之后，焊接结构仅满足第二级冲击韧性。采用改进的GMAW工艺，通过微射流冷却应用来提高接头的力学性能。对接头的微观组织和主要性能进行了分析。介绍了使用新建议的焊接工艺对焊缝各种性能的影响（UTS–极限抗拉强度，YS–屈服强度，泊松比，伸长率，杨氏模量）。然后，采用混合有限元法（FEM）分析了起重机保险杠结构的试验效果。

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IMPACT ANALYSIS OF MICRO-JET COOLING FOR STRESS CONCENTRATION IN A CRANE BUMPER DURING A COLLISION

In the structure of crane bumpers, there is a need to join various types of steel. Usually, low-alloy steel structures are used for this purpose, which can be represented by S355J2 steel. The tensile strength of S355J2 low-alloy steel is slightly below 600 MPa, and the tensile strength of S355J2 steel is at the high level of 200 J at ambient temperature. The impact strength of this steel in negative temperatures is also good at over 47 J at -60 °C, so it meets the 6th class of impact toughness. Welding structures, after classic gas metal arc welding (GMAW) processes, meet only the second impact toughness class. An improved GMAW process was used by micro-jet cooling application to raise the mechanical properties of the joints. The microstructure and main properties of the joints were carefully analyzed. The influence of using the new suggested welding process on the various properties of the welds is presented (UTS – ultimate tensile strength, YS – yield strength, Poisson ratio, elongation, Young’s modulus). Then, the effects of tests for use in crane bumper construction were checked by using a hybrid finite element method (FEM) analysis.

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来源期刊

Transport Problems TRANSPORTATION SCIENCE & TECHNOLOGY-

CiteScore

1.90

自引率

14.30%

发文量

审稿时长

48 weeks

期刊介绍： Journal Transport Problems is a peer-reviewed open-access scientific journal, owned by Silesian University of Technology and has more than 10 years of experience. The editorial staff includes mainly employees of the Faculty of Transport. Editorial Board performs the functions of current work related to the publication of the next issues of the journal. The International Programming Council coordinates the long-term editorial policy the journal. The Council consists of leading scientists of the world, who deal with the problems of transport. This Journal is a source of information and research results in the transportation and communications science: transport research, transport technology, transport economics, transport logistics, transport law.