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Experimental and Numerical Investigation of the T-Stub Elements with Four Bolts in a Row Until Bolt Fracture

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Computational and Experimental Approaches in Materials Science and Engineering (CNNTech 2018)

Part of the book series: Lecture Notes in Networks and Systems ((LNNS,volume 90))

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Abstract

For the past several decades, a codified design of steel connections in civil-engineering has been based on the component approach. For a very common end-plate connection, a tension component, named T-stub, usually dictates the connections’ behavior. This T-stub element is greatly investigated in the configuration with two bolts in a row, but the configuration with four bolts in a row is usually neglected, both in the studies and codes. This paper presents an experimental investigation of T-stub elements and important aspects of their numerical modeling. Special attention is dedicated to the material testing and modeling, since all of the tests were performed until bolt fracture. Uniaxial tests of steel specimens were performed using extensometers, strain gauges, and Aramis system, while the bolt material is additionally tested by microscopic examination and hardness testing. In order to obtain satisfactory calibration of numerical models developed in Abaqus, knowing material parameters including damage initiation and propagation is crucial. Several iterative numerical-experimental procedures for obtaining the true stress-strain curves are outlined and compared, along with the well-known Bridgman method. The advantages of using Aramis system in calibrating numerical model, for both material and assembly are demonstrated. In the end, comparisons of numerical and experimental behavior curves are presented and satisfactory results are obtained.

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Acknowledgment

The research of the first author was supported by the Serbian Ministry of Education, Science and Technological Development, Grant No. 36043.

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Authors and Affiliations

  1. Faculty of Technical Sciences, University of Novi Sad, 21000, Novi Sad, Serbia

    Đorđe Jovanović & Dragiša Vilotić

  2. Faculty of Mechanical Engineering, University of Belgrade, 11000, Belgrade, Serbia

    Nenad Mitrović & Boris Kosić

  3. Faculty of Civil Engineering, University of Belgrade, 11000, Belgrade, Serbia

    Zlatko Marković

Authors
  1. Đorđe Jovanović
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  2. Nenad Mitrović
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  3. Zlatko Marković
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  4. Dragiša Vilotić
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  5. Boris Kosić
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Corresponding author

Correspondence to Đorđe Jovanović .

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Editors and Affiliations

  1. Faculty of Mechanical Engineering, Department for Process Engineering and Environmental Protection, University of Belgrade, Belgrade, Serbia

    Nenad Mitrovic

  2. Innovation Center of Faculty of Mechanical Engineering, Belgrade, Serbia

    Milos Milosevic

  3. Faculty of Mechanical Engineering, Department for Production Engineering, University of Belgrade, Belgrade, Serbia

    Goran Mladenovic

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Jovanović, Đ., Mitrović, N., Marković, Z., Vilotić, D., Kosić, B. (2020). Experimental and Numerical Investigation of the T-Stub Elements with Four Bolts in a Row Until Bolt Fracture. In: Mitrovic, N., Milosevic, M., Mladenovic, G. (eds) Computational and Experimental Approaches in Materials Science and Engineering. CNNTech 2018. Lecture Notes in Networks and Systems, vol 90. Springer, Cham. https://doi.org/10.1007/978-3-030-30853-7_18

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