Special Issue "Metallic Materials under Dynamic Loading"

A special issue of Metals (ISSN 2075-4701).

Deadline for manuscript submissions: 31 May 2019

Special Issue Editors

Guest Editor
Prof. Alexis Rusinek

LEM3 - Laboratory of Microstructure Studies and Mechanics of Materials, UMR-CNRS 7239, Lorraine University, 7 rue Félix Savart, BP 15082, 57073 METZ CEDEX 03, France
Website 1 | Website 2 | E-Mail
Interests: dynamic behavior of materials; constitutive relations; elastic waves propagation; fracture; experiments; simulations
Co-Guest Editor
Dr. Eng. Piotr W. Sielicki

Poznan University of Technology, Faculty of Civil and Environmental Engineering, Institute of Structural Engineering, M.Sklodowskiej-Curie 5, 60-965 Poznan, Poland
Website | E-Mail
Interests: dynamic behavior of materials; explosive & projectile loading; experiments; computing and simulation

Special Issue Information

Dear Colleagues,

The aim of this Special Issue is to publish scientific papers related to dynamic behavior of materials, and also to structure (Impact, explosion, perforation, spalling, etc.). For this purpose, the Special Issue will consist of works related to experimental approaches, modeling, in terms of constitutive relations and computing simulations coupled to experiments. The materials studied will be related to metals, allowing a better understanding of the macroscopic behavior of materials subjected, for example, to large deformation, high strain rates, high temperatures, shock and high pressures. In addition to material behavior, works and papers regarding fracture and damage under extreme conditions (described previously) will be considered.

I hope to receive many propositions to make a high-impact Special Issue on “Dynamic Behavior of Materials and Structures”. I am sure that this Special Issue will be useful for people working in this specific field, and also for PhD students. It will cover experiments, modeling and computing.

Prof. Alexis Rusinek
Dr. Eng. Piotr W. Sielicki
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Metals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1500 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Constitutive relations
  • Mechanical properties
  • Split Hopkinson Pressure Bars
  • Explosive and projectile loading
  • Testing methods
  • Strain rate sensitivity
  • Computing and simulation
  • Elastic waves propagation
  • Dynamic fracture and damage
  • Metals

Published Papers (5 papers)

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Research

Open AccessArticle The Evaluation of the Fracture Surface in the AW-6060 T6 Aluminium Alloy under a Wide Range of Loads
Metals 2019, 9(3), 324; https://doi.org/10.3390/met9030324
Received: 8 February 2019 / Revised: 7 March 2019 / Accepted: 8 March 2019 / Published: 13 March 2019
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Abstract
The present study focused on the behaviour of the AW-6060 aluminium alloy in peak temper condition T6 under a wide range of loads: tensile loading, projectile and explosion. The alloy is used as a structural component of civil engineering structures exposed to static [...] Read more.
The present study focused on the behaviour of the AW-6060 aluminium alloy in peak temper condition T6 under a wide range of loads: tensile loading, projectile and explosion. The alloy is used as a structural component of civil engineering structures exposed to static or dynamic loads. Therefore, it was crucial to determine the material’s behaviour at low and intermediate rates of deformation. Despite the fact that the evaluation of the strain rate sensitivity of the AW-6060 aluminium alloy has already been discussed in literature, the authors of this paper wished to further investigate this topic. They conducted tensile tests and confirmed the thesis that the AW-6060 T6 aluminium alloy has low strain rate sensitivity at room temperature. In addition, the fracture surfaces subjected to different loading (tensile loading, projectile and explosion) were investigated and compared using a scanning electron microscope, because the authors of this paper were trying to develop a new methodology for predicting how samples had been loaded before failure occurred based on scanning electron microscopy (SEM) micrographs. Projectile and explosion tests were performed mainly for the SEM observation of the fracture surfaces. These tests were unconventional and they represent the originality of this research. It was found that the type of loading had an impact on the fracture surface. Full article
(This article belongs to the Special Issue Metallic Materials under Dynamic Loading)
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Open AccessArticle Identification of the Quasi-Static and Dynamic Behaviour of Projectile-Core Steel by Using Shear-Compression Specimens
Metals 2019, 9(2), 216; https://doi.org/10.3390/met9020216
Received: 24 December 2018 / Revised: 31 January 2019 / Accepted: 4 February 2019 / Published: 12 February 2019
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Abstract
Armour-Piercing (AP) projectiles constitute a major threat to be considered for the design of bi-layer-armour configurations constructed using a ceramic front plate backed with a composite/metal layer. When they are not made of tungsten-carbide the cores of these projectiles are made of hard [...] Read more.
Armour-Piercing (AP) projectiles constitute a major threat to be considered for the design of bi-layer-armour configurations constructed using a ceramic front plate backed with a composite/metal layer. When they are not made of tungsten-carbide the cores of these projectiles are made of hard steel, and are the main part that defines the penetration performance of the projectile. However, due to specific testing difficulties, the dynamic behaviour of these high-strength steel AP projectiles has not been investigated in sufficient detail. In this study, a detailed experimental investigation of the dynamic behaviour of the steel used for the steel core of 7.62 mm BZ-type AP projectiles was analysed through the use of Shear-Compression Specimens (SCS). In this study, results from both quasi-static and dynamic experiments were examined. The data processing method employed was set and validated based on numerical simulations. Both quasi-static and dynamic SCS experiments were done with the steel tested which clearly indicated the steel cores exhibit a very high elastic limit, little strain-hardening, and very little strain-rate sensitivity despite the wide range of strain-rates considered. This experimental characterisation paves the way to the numerical modelling for the analysis of ballistic impact of 7.62 mm AP projectile against lightweight armour configurations. Full article
(This article belongs to the Special Issue Metallic Materials under Dynamic Loading)
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Open AccessArticle Material Behavior Description for a Large Range of Strain Rates from Low to High Temperatures: Application to High Strength Steel
Metals 2018, 8(10), 795; https://doi.org/10.3390/met8100795
Received: 30 August 2018 / Revised: 24 September 2018 / Accepted: 1 October 2018 / Published: 3 October 2018
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Abstract
Current needs in the design and optimization of complex protective structures lead to the development of more accurate numerical modelling of impact loadings. The aim of developing such a tool is to be able to predict the protection performance of structures using fewer [...] Read more.
Current needs in the design and optimization of complex protective structures lead to the development of more accurate numerical modelling of impact loadings. The aim of developing such a tool is to be able to predict the protection performance of structures using fewer experiments. Considering only the numerical approach, the most important issue to have a reliable simulation is to focus on the material behavior description in terms of constitutive relations and failure model for high strain rates, large field of temperatures and complex stress states. In this context, the present study deals with the dynamic thermo-mechanical behavior of a high strength steel (HSS) close to the Mars® 190 (Industeel France, Le Creusot, France). For the considered application, the material can undergo both quasi-static and dynamic loadings. Thus, the studied strain rate range is varying from 10−3–104 s−1. Due to the fast loading time, the local temperature increase during dynamic loading induces a thermal softening. The temperature sensitivity has been studied up to 473 K under quasi-static and dynamic conditions. Low temperature measurements (lower than the room temperature) are also reported in term of σ ε | ε ˙ , T curves. Experimental results are then used to identify the parameters of several constitutive relations, such as the model developed initially by Johnson and Cook; Voyiadjis and Abed; and Rusinek and Klepaczko respectively termed Johnson–Cook (JC), Voyiadjis–Abed (VA), and Rusinek–Klepaczko (RK). Finally, comparisons between experimental results and model predictions are reported and compared. Full article
(This article belongs to the Special Issue Metallic Materials under Dynamic Loading)
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Open AccessArticle Monitoring Steel Bolted Joints during a Monotonic Tensile Test Using Linear and Nonlinear Lamb Wave Methods: A Feasibility Study
Metals 2018, 8(9), 683; https://doi.org/10.3390/met8090683
Received: 10 August 2018 / Revised: 25 August 2018 / Accepted: 30 August 2018 / Published: 31 August 2018
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Abstract
The structural integrity of steel bolted joints may be compromised due to excessive loading. Therefore, condition assessment and the detection of potential defects before they cause a failure have become a major issue. The paper is focused on the condition monitoring of a [...] Read more.
The structural integrity of steel bolted joints may be compromised due to excessive loading. Therefore, condition assessment and the detection of potential defects before they cause a failure have become a major issue. The paper is focused on the condition monitoring of a bolted lap joint subjected to progressive degradation in a tensile test. The inspection used Lamb waves propagated through the overlap area. Wave propagation signals were registered automatically by means of piezoelectric transducers. Two damage indices were defined based on linear and nonlinear features of Lamb waves. The use of a network of piezoelectric transducers and the analysis of multiple signals instead of single ones was proved to effectively monitor the state of the bolted joint. The obtained results showed that the method enabled to detect selected stages of the degradation process and to characterize the reduction of the contact area between the plates in the overlap area. Full article
(This article belongs to the Special Issue Metallic Materials under Dynamic Loading)
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Open AccessArticle Nanoscale Twinned Ti-44Al-4Nb-1.5Mo-0.007Y Alloy Promoted by High Temperature Compression with High Strain Rate
Metals 2018, 8(8), 619; https://doi.org/10.3390/met8080619
Received: 27 May 2018 / Revised: 14 July 2018 / Accepted: 2 August 2018 / Published: 7 August 2018
Cited by 1 | PDF Full-text (2663 KB) | HTML Full-text | XML Full-text
Abstract
In order to investigate the dynamic mechanical behavior of TiAl alloys and promote their application in the aerospace industry, uniaxial compression of Ti-44Al-4Nb-1.5Mo-0.007Y (at %) alloy was conducted at a temperature range from 25 to 400 °C with a strain rate of 2000 [...] Read more.
In order to investigate the dynamic mechanical behavior of TiAl alloys and promote their application in the aerospace industry, uniaxial compression of Ti-44Al-4Nb-1.5Mo-0.007Y (at %) alloy was conducted at a temperature range from 25 to 400 °C with a strain rate of 2000 s‒1. Twinning is found to be the dominating deformation mechanism of the γ phase at all temperatures, and the addition of Nb and Mo has a chemical impact on the alloy and reduces the stacking fault energy of the γ phase. The decreased stacking fault energy increases the twinnability; thus, the deformation is dominated by twinning, which increases the dynamic strength of the alloy. With the temperature increasing from 25 to 400 °C, the average spacing of twins in the γ phase increases from 32.4 ± 2.9 to 88.1 ± 9.2 nm. The increased temperature impedes the continuous movement of partial dislocations and finally results in an increased twin spacing in the γ phase. Full article
(This article belongs to the Special Issue Metallic Materials under Dynamic Loading)
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Graphical abstract

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