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Mechanical Behaviour of Advanced Materials and Structures under Impact Loading

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Materials Physics".

Deadline for manuscript submissions: closed (20 April 2024) | Viewed by 3385

Special Issue Editors


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Guest Editor
School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, China
Interests: impact dynamics; numerical modeling; mechanical behaviour of materials; aeronautical engineering; constitutive laws of materials

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Guest Editor
School of Aerospace Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Interests: impact dynamics; mechanical behaviour of structures; aeronautical engineering; dynamic fracture

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Guest Editor
School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, China
Interests: impact dynamics; molecular dynamics; mechanical behaviour of materials; aeronautical engineering

Special Issue Information

Dear Colleagues,

Metals, composites, and ceramics are functional materials found in nature or synthesized for use in the design of structural components to bear static and dynamic loads. Under extreme conditions, such as ballistic impacts, thermal shocks, or excessive loading, materials and structures respond differently to the loading state and loading rate. Phenomena such as fracture, dislocation dynamics, and viscoplasticity emerge due to these extreme conditions and substantially affect the strain–stress response, energy absorption, and crashworthiness of materials and structures. A thorough understanding of these phenomena requires testing, simulation, and analyses.

This Special Issue is concerned with the responses of structures and materials subjected to impact and high-rate loading. Scientifically sound and well-organized analytical, computational, and experimental studies are being solicited. Subjects relevant to this Special Issue include the following topics and those associated with them: the behaviour and failure of structures and materials under impact loading, the structures and materials used to protect and absorb impact loading, dynamic behaviour, and the failure of materials including plasticity and fracture, structural crashworthiness, high-rate mechanical and forming processes, impact and high-rate loading/measurement techniques and their applications, mesoscale modelling, and constitutive models for materials under impact loading.

Manuscripts submitted for publication will be subjected to stringent peer review and assessed for their contribution to scientific understanding of both these phenomena and the responses of structures and materials to impact and high-rate loading. Well-designed and well-documented experimental studies that advance knowledge of the responses of materials and structures subjected to impact and high-rate loading are of relevance and interest. However, they should be accompanied by an analysis of the experimental data and appropriate conclusions. The inclusion of analytical modelling and/or numerical simulations to support the experimental findings will enhance the depth and quality of the research reported.

Dr. Cunxian Wang
Dr. Mingshi Wang
Prof. Dr. Qiong Deng
Guest Editors

Manuscript Submission Information

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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. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

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Keywords

  • behaviour and failure of structures and materials under impact loading
  • structures and materials for protection and absorption of impact loading
  • dynamic behaviour and failure of materials, including plasticity and fracturing
  • structural crashworthiness
  • high-rate mechanical and forming processes
  • impact and high-rate loading/measurement techniques and their applications
  • mesoscale modelling of materials under impact loading
  • constitutive model for materials under impact loading

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Published Papers (2 papers)

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Research

16 pages, 6591 KiB  
Article
Radial Inertia Effect of Ultra-Soft Materials from Hopkinson Bar and Solution Methodologies
by Yue Liu, Yongshuai Wang and Qiong Deng
Materials 2024, 17(15), 3793; https://doi.org/10.3390/ma17153793 - 1 Aug 2024
Cited by 2 | Viewed by 860
Abstract
The split-Hopkinson pressure bar technique is widely used to determine the dynamic mechanical behavior of materials. However, spike-like stress features appear in the initial stress behavior of ultra-soft materials tested with a split-Hopkinson bar. These features are not intrinsic characteristics of the materials. [...] Read more.
The split-Hopkinson pressure bar technique is widely used to determine the dynamic mechanical behavior of materials. However, spike-like stress features appear in the initial stress behavior of ultra-soft materials tested with a split-Hopkinson bar. These features are not intrinsic characteristics of the materials. Potential causes were investigated through experiments and numerical simulations. It was found that the spike feature represents derived stress resulting from the radial inertia effect during dynamic loading. In this work, we propose and experimentally verify effective methods to reduce this effect. The influences of density, strain acceleration, ratio between inner and outer diameter, and Poisson’s ratio on the radial inertia effect were investigated. The spike stress was found to change linearly with density and strain acceleration but decrease significantly when the inner/outer diameter ratio was below 0.3, after which it remained nearly constant. A parabolic stress distribution was observed along the radial direction due to the Poisson effect, especially when the ratio exceeded 0.3, leading to higher spike stress. Finally, suggestions were proposed as experimental guidance when testing ultra-soft materials. Full article
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19 pages, 22457 KiB  
Article
Study of CFRP Laminate Gradually Modified throughout the Thickness Using Thin Ply under Transvers Tensile Loading
by Hossein Malekinejad, Farin Ramezani, Ricardo J. C. Carbas, Eduardo A. S. Marques and Lucas F. M. da Silva
Materials 2024, 17(10), 2388; https://doi.org/10.3390/ma17102388 - 16 May 2024
Cited by 2 | Viewed by 2051
Abstract
The use of thin-ply composite materials has rapidly increased due to their tailorable mechanical properties and design flexibility. Considering an adhesively bonded composite joint, peel stress stands out as a key contributor leading to failure among other primary stress factors. Therefore, the reinforcement [...] Read more.
The use of thin-ply composite materials has rapidly increased due to their tailorable mechanical properties and design flexibility. Considering an adhesively bonded composite joint, peel stress stands out as a key contributor leading to failure among other primary stress factors. Therefore, the reinforcement of carbon fiber-reinforced polymer (CFRP) laminates throughout the thickness could be considered as an approach to improve the joint strength. Using thin plies locally between the conventional CFRP layers in a laminate can enhance the strength, as the sudden change in stiffness means that the load transfer is not monotonous. Consequently, the following study examined the effect of altering thin plies gradually throughout the thickness on the behaviour of the CFRP laminates when subjected to transverse tensile loading. To achieve this goal, the CFRP laminates were gradually modified by using different commercially accessible prepreg thin plies, leading to an improved overall structural performance by reducing stress concentrations. Besides conducting an experimental study, a numerical assessment was also carried out utilizing Abaqus software with a Representative Volume Element (RVE) at the micro scale. The comparison of reference configurations, which involved various thin plies with different thicknesses and traditional CFRP laminates, with the suggested gradual configuration, demonstrated a notable enhancement in both strength and material cost. Furthermore, the proposed RVE model showed promising capability in accurately forecasting the strength of fabricated laminates. Full article
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