Materials Testing
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Editor-in-Chief:
Thomas Böllinghaus
Thomas BöllinghausSearch for this author in:
About this journal
All articles are subject to thorough, independent peer review.
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Unable to retrieve citations for this documentRequires Authentication UnlicensedIncreasing the range of EVs: a TRIZ-inspired approachLicensedOctober 1, 2025Emre DorukThis study explores the application of theory of inventive problem solving (TRIZ) methodologies to enhance the driving range of electric vehicles (EVs) without compromising efficiency or weight. The research identifies two primary technical contradictions related to battery capacity and vehicle weight, proposing five ideal final results (IFRs) to resolve these challenges. The solutions include modular battery systems, integrated heat pumps, phase change materials (PCMs) for thermal management, air-drying membranes in heating, ventilation, and air conditioning (HVAC) systems, and piezoelectric misting for energy-efficient cooling. Through systematic use of TRIZ tools such as contradiction matrix, substance-field (Su-Field) analysis, and the smart little people (SLP) method, the study evaluates each solution based on manufacturability, adaptability, cost-effectiveness, and patentability. The results indicate that TRIZ-based approaches offer innovative pathways to increase EV range, reduce energy consumption, and improve overall sustainability. The proposed solutions highlight the potential for integrating advanced technologies into EV design, presenting novel approaches to solving the complex problem of range extension in electric vehicles.
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Unable to retrieve citations for this documentRequires Authentication UnlicensedUsing design thinking methodology for developing innovative auto-injection systemsLicensedOctober 1, 2025Burhan Sahin, Emre DorukIt is crucial to create a practical and efficient solution for patients requiring regular self-injections. Currently used auto-injection systems face challenges such as high cost, complex assembly, and hygiene issues. In this field, medical device manufacturers are developing alternative designs with patient-friendly solutions. In this paper, a new auto-injection syringe system has been developed using the design thinking method. The proposed new design eliminates the need for medication transfer, creating an innovative system that enhances hygiene and user convenience. Recyclable materials were used in the design to develop a cost-effective solution. Static analyses performed using NX Nastran software has validated the design’s structural integrity and functionality. Through the ergonomic design developed with the design thinking method, the goal is to create a solution that increases patient comfort, reduces environmental impact, and meets medical standards.
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Unable to retrieve citations for this documentOctober 1, 2025Sadiq M. Sait, Pranav Mehta, Dildar Gürses, Ali Riza YildizThis research presents a modified version of the sled dog optimizer (SDO) to enhance optimization performance across various benchmark functions and real-world applications. The proposed modification introduces adaptive mechanisms to balance exploration and exploitation, thereby improving convergence speed and solution accuracy. Experimental results demonstrate that the modified SDO outperforms the standard SDO and other contemporary metaheuristic algorithms in terms of optimization efficiency and robustness. Comparative analysis of standard test functions and engineering design problems confirms the superiority of the proposed approach.
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Unable to retrieve citations for this documentRequires Authentication UnlicensedStress concentration factors for bending with symmetric opposite notches in thin beam evaluated by FEM and ANNLicensedSeptember 23, 2025Muhammed Ikbal Sahin, Murat Tolga OzkanIn machine design, numerous tables are utilized, but only a few are used intensively. The development of scientific techniques and software has allowed frequently used tables to become more user-friendly. This study focuses on converting previously nondigitized experimental data into a more practical format using advanced computer technology and software. Fatigue is the primary cause of failure in machine parts. During the design phase, features like holes, channels, grooves, and protrusions disrupt the continuity of the part, and dimensionless part size parameters play a crucial role in the design process. This research investigates bending with symmetric opposite notches in a thin beam, based on data compiled by Peterson that had not been digitized before. Initially, the curves from the tables were digitized and organized while adhering to the original parameters. A parametric Finite Element solid model was created, and analyses were conducted using the obtained parametric values. Each curve from the original table was validated through regression methods using Finite Element results. Furthermore, an Artificial Neural Network (ANN) model was developed based on the original curve data. The original curves, finite element results, and ANN model were compared, and a new model proposal was made.
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Unable to retrieve citations for this documentRequires Authentication UnlicensedElectrochemical behavior of welded joints of 10MnNiCr marine steel under stress in seawaterLicensedSeptember 8, 2025LiHua Gong, WeiMin GuoThe microstructure morphology of welded joints of marine steel 10MnNiCr was studied by OM analysis. External stresses were applied to the welded joints using the four-point bending method, and the differences in the electrochemical properties of the welded joints with different stresses applied were compared after 7d and 28d corrosion, respectively, using a combination of polarization curves and EIS tests. It was found that the welded joints showed a general trend of increasing corrosion rate with increasing external stress, but the difference in electrochemical properties between the 40 % σs and 65 % σs rusted specimens with smaller stresses applied was small. The electrochemical property changes of the specimen with applied 90 % σs stress are also not significant in a relatively short period of time, but the electrochemical performance showed a great difference with the increase of corrosion time, the corrosion rate increased significantly. These results are closely related to the influence of the alloying elements contained in this type of material on the corrosion products.
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Unable to retrieve citations for this documentOpen AccessImproving the energy absorption capabilities of carbon fiber/epoxy composites by embedding steel wire meshesJanuary 1, 2000Mehmet İskender ÖzsoyCarbon fibers are widely utilized in various engineering fields such as automotive, aerospace, and civil infrastructure due to their exceptional properties including low density, high tensile strength, and high stiffness. Despite these advantageous characteristics, their inherently brittle nature poses significant limitations, particularly under impact loading conditions. To address this issue, hybrid composite structures comprising carbon fiber and steel wire mesh layers were fabricated using the vacuum infusion technique. This study investigates the influence of both the number and positioning of steel wire mesh layers on the energy absorption capacity and damage mechanisms of carbon fiber-reinforced epoxy composites under low-velocity impact conditions. Impact tests were conducted at energy levels ranging from 20 to 40 J using a drop-weight impact testing machine. The results demonstrate that the incorporation of steel wire mesh significantly enhances the toughness and damage tolerance of the carbon fiber composites, indicating the effectiveness of hybridization as a strategy for improving the impact performance of brittle composite systems.
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Volume 67 | (2025)
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Volume 66 | (2024)
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Volume 65 | (2023)
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Volume 64 | (2022)
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Volume 63 | (2021)
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Volume 62 | (2020)
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Volume 61 | (2019)
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Volume 60 | (2018)
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Volume 59 | (2017)
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Volume 58 | (2016)
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Volume 57 | (2015)
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Volume 56 | (2014)
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Volume 55 | (2013)
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Volume 54 | (2012)
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Volume 53 | (2011)
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Volume 52 | (2010)
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Volume 51 | (2009)
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Volume 50 | (2008)
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Volume 49 | (2007)
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Volume 48 | (2006)
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Volume 47 | (2005)
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Volume 46 | (2004)
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Volume 45 | (2003)
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Volume 44 | (2002)
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Volume 43 | (2001)
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Volume 42 | (2000)
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Volume 41 | (1999)
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Volume 40 | (1998)
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Volume 39 | (1997)
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Volume 38 | (1996)
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Volume 37 | (1995)
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Volume 36 | (1994)
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Volume 35 | (1993)
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Volume 34 | (1992)
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Volume 33 | (1991)
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Volume 32 | (1990)
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Volume 31 | (1989)
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Volume 30 | (1988)
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Volume 29 | (1987)
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Volume 28 | (1986)
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Volume 27 | (1985)
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Volume 26 | (1984)
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Volume 25 | (1983)
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Volume 24 | (1982)
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Volume 23 | (1981)
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Volume 22 | (1980)
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Volume 21 | (1979)
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Volume 20 | (1978)
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Volume 19 | (1977)
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Volume 18 | (1976)
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Volume 17 | (1975)
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Volume 16 | (1974)
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Volume 15 | (1973)
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Volume 14 | (1972)
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Volume 13 | (1971)
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Volume 12 | (1970)
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Volume 11 | (1969)
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Volume 10 | (1968)
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Volume 9 | (1967)
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Volume 8 | (1966)
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Volume 7 | (1965)
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Volume 6 | (1964)
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Volume 5 | (1963)
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Volume 4 | (1962)
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Volume 3 | (1961)
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Volume 2 | (1960)
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Volume 1 | (1959)
to be implemented...
Journal Impact Factor | 3.5 | 2024, Journal Citation Reports (Clarivate, 2025) |
5-year Journal Impact Factor | 2.3 | 2024, Journal Citation Reports (Clarivate, 2025) |
Journal Citation Indicator | 0.84 | 2024, Journal Citation Reports (Clarivate, 2025) |
CiteScore | 4.7 | 2024, Scopus (Elsevier B.V., 2025) |
SCImago Journal Rank | 0.571 | 2024, SJR (Scimago Lab, 2025; Data Source: Scopus) |
Source Normalized Impact per Paper | 1.032 | 2024, CWTS Journal Indicators (CWTS B.V., 2025; Data Source: Scopus) |
Manuscript submission
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Herausgeber
Prof. Dr.-Ing. Thomas Böllinghaus (MT@degruyter.com)
University of Namibia (UNAM)
Advisor to the Vice Chancellor
Faculty of Agriculture, Engineering & Natural Sciences
340 Mandume Ndemufayo Avenue, Pioneerspark
PB 13301, Windhoek, Namibia
Editorial Board
Suresh Babu, University of Tennessee, Knoxville, Tennessee, USA
Manfred Bacher-Höchst, Robert Bosch GmbH, Stuttgart, Germany
Y. Frank Chen, Pennsylvania State University Harrisburg, Middleton, Pennsylvania, USA
Carl E. Cross, Los Alamos National Laboratory, Los Alamos, New Mexico, USA
Dan Eliezer, Ben Gurion University, Be'er Scheva, Israel
Cagatay Elibol, Turkish-German University, Istanbul, Turkey
Norbert Enzinger, Graz University of Technology, Austria
Petrina Johannes, University of Namibia, Ongwediva, Namibia
Gobboon Lonthongkum, Chulalongkorn University, Bangkok, Thailand
Peter Mayr, Technical University of Munich, Munich, Germany
Andreas Neidel, Siemens Energy, Berlin, Germany
Peter Starke, Kaiserslautern University of Applied Sciences, Kaiserslautern, Germany
Tanju Teker, Sivas Cumhuriyet University, Sivas, Türkiye
Frank Walther, TU Dortmund University, Dortmund, Germany
Ali Riza Yildiz, Bursa Uludag University, Bursa, Turkey
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