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Processes
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Mechanical Behavior and Degradation Processes of Advanced Materials
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Mechanical Behavior and Degradation Processes of Advanced Materials

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Materials Processes".

Deadline for manuscript submissions: closed (30 October 2023) | Viewed by 9102

Special Issue Editors

Dr. Seyed Saeid Rahimian Koloor

E-Mail Website
Guest Editor
Institute for Nanomaterials, Advanced Technologies and Innovation (CXI), Technical University of Liberec (TUL), Studentska 2, 461 17 Liberec, Czech Republic
Interests: solid mechanics (mathematical-physical modeling, simulation and experimentation); advanced composites; continuum mechanics; fatigue; fracture and damage mechanics; computational solid mechanics; design and analysis of materials and structures
Special Issues, Collections and Topics in MDPI journals
Dr. Noorfaizal Yidris

E-Mail Website
Guest Editor
Department of Aerospace Engineering, Universiti Putra Malaysia (UPM), Serdang 43400, Malaysia
Interests: thin-walled structural systems; lightweight aerospace and automotive components; mechanical characterization; failure mechanics; numerical modeling; artificial intelligence
Dr. Atefeh Karimzadeharani

E-Mail Website
Guest Editor
Leibniz Institute for Solid State and Materials Research (IFW Dresden), Helmholtzstr 20, 01069 Dresden, Germany
Interests: nano/micro mechanics; materials characterization; experimental mechanics; computational mechanics; stress analysis; damage mechanics; advanced composite materials; multilayer thin films

Special Issue Information

Dear Colleagues,

Advanced materials, including composites, alloys, nanomaterials, etc., have become the most widely used engineering materials in the manufacturing of structures in aerospace, automotive, energy, etc., industries. Recent advances in the prediction of the mechanical response, mechanism of deformation, and damage processes of materials have become an effective tool in the design and development of structures in real operational conditions. Mathematical–physical modeling, computational approaches, and novel experimental methods are the key scientific activities for predicting the mechanical behavior during the process of material degradation and damage and for measuring the structural stability and integrity in the design service life. Many factors affect the design life of the advanced structures, including microstructural changes due to residual stress, time-dependent deformation and damage accumulation, environmental attack due to temperature changes, corrosion, moisture absorption, creep, fatigue, etc., as well as other factors and their synergistic effects.

This Special Issue on Mechanical Behavior and Degradation Processes of Advanced Materials collects novel Research and Review Articles that contribute to developments in new science and engineering of theoretical, computational, and experimental mechanics concerning the Material Degradation Process due to damage, corrosion, moisture absorption, aging, creep, fatigue, wear, failure, environmental effect, etc. In this regard, the Special Issue contains the following research topics:

  • Advanced Materials: ductile materials, metals and alloys, brittles and ceramics, polymers, biomaterials, biocomposites, nanocomposites, polymer composites, metal matrix composites, ceramic matrix composites, ductile composites, hybrid composites, sandwich structures, reinforced-concrete, etc.;
  • Degradation Process: physical, chemical, environmental, time-dependent;
  • Mechanical Behavior: linear-nonlinear deformation, elastic, hyperelastic, viscoelastic, plastic, etc.;
  • Damage Mechanics: fatigue, fracture, creep, impact, etc.;
  • Characterizations: mechanical, physical, thermal, etc.;
  • Computational mechanics: Finite element method, finite differences, peridynamics, real-time simulation, etc.;
  • Novel experimental methods: in both mechanical and structural analyses.

Authors are welcome to submit their latest research findings in the form of original full articles, letters, communications, or review articles.

Dr. Seyed Saeid Rahimian Koloor
Dr. Noorfaizal Yidris
Dr. Atefeh Karimzadeharani
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 submissions that pass pre-check are 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. Processes 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 2400 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

  • mathematical model
  • numerical and computational methods
  • experimental method
  • advanced materials
  • mechanical behavior
  • degradation process
  • damage process
  • corrosion process
  • moisture absorption
  • aging process
  • creep process
  • fatigue process
  • wear process
  • failure process
  • environmental effect

Published Papers (5 papers)

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Research

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14 pages, 5076 KiB  
Article
Strain Rate Effect on Mode I Debonding Characterization of Adhesively Bonded Aluminum Joints
by Safdar Ali Khan, Seyed Saeid Rahimian Koloor, Wong King Jye, Noorfaizal Yidris, Ab Aziz Mohd Yusof, Mohd Al Fatihhi Mohd Szali Januddi, Mohd Nasir Tamin and Mahzan Johar
Processes 2023, 11(1), 81; https://doi.org/10.3390/pr11010081 - 28 Dec 2022
Cited by 2 | Viewed by 1248
Abstract
In adhesive bonding, two different substrate materials are joined together, usually by forming chemical bonds. The adhesive can stick things together. The loading rate and deformation mode can easily change the mechanical properties of the adhesive material. Hence, a vital aim of the [...] Read more.
In adhesive bonding, two different substrate materials are joined together, usually by forming chemical bonds. The adhesive can stick things together. The loading rate and deformation mode can easily change the mechanical properties of the adhesive material. Hence, a vital aim of the current study is to evaluate the strain rate effect on the damage response of adhesive joints for Mode I loading scenarios. The adherend material was aluminum AL6061-T6, and Araldite 2015 was the adherent material. This experiment for delamination had a prescribed adherend size of 200 mm × 25 mm × 3 mm and an adhesive thickness of 0.5 mm. In situations where the strain rate affects the failure mechanism, a displacement rate of 5, 50, or 500 mm/min is sufficient to attain the failure mechanism. A double cantilever beam (DCB) specimen was employed to construct the FE model geometry for simulation. A hybrid experimental–FE technique was utilized to extract the properties of the adhesive interface. FE simulation has proven to have an excellent correlation with the experimental findings. Full article
(This article belongs to the Special Issue Mechanical Behavior and Degradation Processes of Advanced Materials)
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15 pages, 5884 KiB  
Article
Development of a Continuous Testing Device for Pavement Structure Bearing Capacity
by Zhipo Cao, Naixing Liang, Sheng Zeng and Xianshui Gang
Processes 2022, 10(11), 2325; https://doi.org/10.3390/pr10112325 - 08 Nov 2022
Cited by 1 | Viewed by 906
Abstract
Pavement structure bearing capacity is an important evaluation parameter in pavement design, construction, maintenance management, and reconstruction, and is generally expressed by the pavement deflection value. Some of the current road bearing capacity detection equipment have high detection accuracy, but the detection speed [...] Read more.
Pavement structure bearing capacity is an important evaluation parameter in pavement design, construction, maintenance management, and reconstruction, and is generally expressed by the pavement deflection value. Some of the current road bearing capacity detection equipment have high detection accuracy, but the detection speed is slow, they cannot achieve real-time continuous detection; and some detection speeds are fast, but the measurement accuracy is easily affected by the pavement roughness and vehicle vibration. Moreover, the detection result is the pavement displacement, which cannot directly reflect the comprehensive modulus of the pavement structure. In this paper, firstly, a two-stage jump mechanical model of “machine-pavement” system is established in order to develop a device that can simulate the real driving load and continuously test the bearing capacity of pavement structure, and the main factors affecting the acceleration response of vibrating drums were determined through analysis. Then, a finite element model of the “machine-pavement” system was established to overcome the difficulty in obtaining the parameters such as vibrating weight, equivalent stiffness, and equivalent damping of pavement structure in numerical solution of dynamic model. Next, the mean value A of the maximum acceleration signal of the vibrating drum and the coefficient of variation acv of the maximum acceleration signal were selected as evaluation indicators to analyze the change trend of the maximum acceleration of the vibrating drum with the excitation frequency and excitation force under different composite modulus of pavement structures. Finally, the relationship between the composite modulus E of the pavement structure and the maximum acceleration A of the vibrating drum was obtained by simulating the pavement structure with the composite modulus ranging from 100 MPa to 2900 MPa, and the accuracy of this relationship was verified by field tests. The research showed that the acceleration signal of the vibrating drum had a good fitting relationship with the bearing capacity of the pavement structure when the testing device with the vibrating drum mass of 100 kg, the exciting frequency of 60 Hz, and the exciting force of 650 N jumped on the pavement structure, and the error was about 20% after comparing with the results of Benkelman beam testing, which basically met the engineering requirements. Therefore, the device can be used to continuously detect the bearing capacity of pavement structures. Full article
(This article belongs to the Special Issue Mechanical Behavior and Degradation Processes of Advanced Materials)
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15 pages, 2001 KiB  
Article
Experimental Investigation on the Mechanical Characteristics of Cement-Based Mortar Containing Nano-Silica, Micro-Silica, and PVA Fiber
by Hossein Nematian Jelodar, Ata Hojatkashani, Rahmat Madandoust, Abbas Akbarpour and Seyed Azim Hosseini
Processes 2022, 10(9), 1814; https://doi.org/10.3390/pr10091814 - 08 Sep 2022
Cited by 2 | Viewed by 1394
Abstract
This paper investigates bending and compressive strengths as mechanical characteristics of cement-based repair mortar containing nano-silica (NS) and micro-silica (SF) as cement replacements particles and polyvinyl alcohol (PVA) fibers. The mentioned materials were added to the mortar in three different conditions, including single [...] Read more.
This paper investigates bending and compressive strengths as mechanical characteristics of cement-based repair mortar containing nano-silica (NS) and micro-silica (SF) as cement replacements particles and polyvinyl alcohol (PVA) fibers. The mentioned materials were added to the mortar in three different conditions, including single (just one material), binary (mixture of two admixtures), and ternary (mixture of all three admixtures) modes. The use of PVA fibers, nano-silica and micro-silica in the triple combination of a cement-based mortar is the primary objective of the current research. In total, 28 mix designs with various percentages of particles and fiber were employed in the current study, and 112 different specimens were prepared to conduct the experimental research. The compressive and flexural strength results have been selected as the criteria for obtaining the optimum mix design for each condition. In order to specify the mechanical characteristics of specimens, a compressive test was carried out according to ACI 318, and the three-point bending test was utilized according to BS EN 1015-11. The results obtained from this study show that the mixture containing 10% silica fume (SF10) can be considered the optimum mix design for the single-mode condition. For such a mix design, a flexural strength increase of 27% and a compressive strength improvement of 48% were determined in comparison to the reference mixture design. The mixture containing nano-silica at 2% and silica fume at 8% (NS2SF8) was the optimum mix design in the binary mode condition. With the current mix design, a flexural strength improvement of 24% and a compressive strength increase of 49% in a 28-day specimen were recorded. Finally, under the ternary mode condition, a flexural strength enhancement of 3.5% and a compressive strength improvement of 4.6% were obtained. Additionally, the mixture design containing a PVA content of 0.75% and an SF content of 10% (PVA0.75SF10) was considered optimum. Full article
(This article belongs to the Special Issue Mechanical Behavior and Degradation Processes of Advanced Materials)
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8 pages, 1601 KiB  
Article
The Radiation Shielding Performance of Polyester with TeO2 and B2O3
by M. I. Sayyed, Sabina Yasmin, Nouf Almousa and Mohamed Elsafi
Processes 2022, 10(9), 1725; https://doi.org/10.3390/pr10091725 - 31 Aug 2022
Cited by 18 | Viewed by 1141
Abstract
In this research, polymers were fabricated through combining polyester, boron oxide (B2O3), and Tellurium oxide (TeO2). B2O3 has good neutron absorption and TeO2 is not only highly dense (5.670 g/cm3) but [...] Read more.
In this research, polymers were fabricated through combining polyester, boron oxide (B2O3), and Tellurium oxide (TeO2). B2O3 has good neutron absorption and TeO2 is not only highly dense (5.670 g/cm3) but also environment-friendly, compared to PbO, as well as being a good photon absorber. The radiation protection features for five investigated samples were examined utilizing an HPGe detector and point sources Am-241, Cs-137, and Co-60. The accuracy of the experimental setup of this experiment was proven through the linear attenuation coefficient (LAC) values obtained from the theoretical (XCOM) and experimental (HPGe) values of the newly developed polymers. The attained results showed that the values of LAC decrease with increasing energy. Moreover, at low energy, a noteworthy increase was found for the LAC values with the addition of TeO2. Due to the increase in TeO2 content of the polymers, the value of the half value layer (HVL) decreases from 6.073–4.193 cm at energy 0.662 MeV, from 7.973–5.668 cm at energy 1.173 MeV, and 8.514–6.061 cm at energy 1.333 MeV. The values of the effective atomic number (Zeff) showed an improvement with the increase in TeO2 content in the polymers. For example, at energy 0.150 MeV, the Zeff values of the prepared sample followed this decreasing trend - PBT-40 > PBT-30 > PBT-20 > PBT-10 > PBT-0. Full article
(This article belongs to the Special Issue Mechanical Behavior and Degradation Processes of Advanced Materials)
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Review

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23 pages, 3577 KiB  
Review
Techniques Used for Bond Strengthening of Sub-Standard Splices in Concrete: A Review Study
by Sabry Fayed, Walid Mansour, Taher A. Tawfik, Peter Sabol and Dušan Katunský
Processes 2023, 11(4), 1119; https://doi.org/10.3390/pr11041119 - 05 Apr 2023
Cited by 2 | Viewed by 3565
Abstract
Bar splicing is considered an essential part of the construction process of reinforced concrete (RC) due to the ease of installation in construction, transportation constraints, and restricted length of reinforcing bars. Splices serve the primary role of joining reinforcement bars in standard RC [...] Read more.
Bar splicing is considered an essential part of the construction process of reinforced concrete (RC) due to the ease of installation in construction, transportation constraints, and restricted length of reinforcing bars. Splices serve the primary role of joining reinforcement bars in standard RC elements such as columns, walls, beams, slabs, and joints. Bond behavior between the bars and the concrete is one of the fundamental qualities required for appropriate RC structure design and analysis, as it affects serviceability and ultimate limit states. The most common failure found in lap splice locations is debonding, which occurs at the splice region and insufficient lapped length is considered as the primary cause because of design or construction mistakes, design by outmoded code, and natural catastrophes. As a result, strengthening existing substandard splices in RC structures is critical. The purpose of this research is to analyze and summarize experimental strengthening solutions for inadequate splices. The most common methods are confining spirals, confining with internal or external steel stirrups or carbon fiber reinforced polymer (CFRP), concrete jacketing, fiber reinforced polymers (FRP), post-tensioning prestressed RC, external confining with CFRP, near surface mounted (NSM) techniques, ultra-high-performance concrete (UHPC), fiber reinforced concrete (FRC) and combinations of two methods. Each method of strengthening is evaluated based on its performance, benefits, drawbacks, application-specific elements, and variables influencing the design and scope of applicability. A comparison of the key methodologies was also carried out. The most recent studies and recommendations for improving inadequate lapped splices are provided. Full article
(This article belongs to the Special Issue Mechanical Behavior and Degradation Processes of Advanced Materials)
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