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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) Indonesian Journal of Multidisciplinary Science Advance Sustainable Science, Engineering and Technology (ASSET)
Asep Kurnia
Institut Teknologi Bandung
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences

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Analysis of the Influence of Adhesive, Geometry, and Manufacturing Processes on Mixed Mode Stress Ratio in Single Lap Shear Adhesive Joint Structures of Aluminum and Composite Plates Asep Kurnia; Bambang Kismono Hadi; Hendri Syamsudin; Muhamad Giri Suada
Jurnal Penelitian Pendidikan IPA Vol 10 No 11 (2024): November
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i11.9107

Abstract

In aircraft structures, composite plate joints often present significant challenges. Mechanical fastenings such as pins, bolts, or rivets require holes to be drilled in the plates, which reduces the strength of the laminate due to stress concentrations around the hole edges. These joints frequently become sources of structural failure in aircraft. Therefore, the design of composite plate joints is crucial to maintain structural integrity. Adhesive joints offer several advantages over mechanical joints, including the ability to join two different materials, more uniform stress distribution along the joint, and reduced weight since no bolts or rivets are needed. The most common adhesive joint design is the Single Lap Joint (SLJ), which is popular due to its simple geometry and high structural efficiency. However, the main drawback of the SLJ is load eccentricity, which leads to secondary bending and undesirable normal stresses along the adhesive edges. The hypothesis of this study is that SLJ conditions with optimal shear strength can be achieved through the right combination of adhesive type, bond surface preparation, and joint configuration. This study analyzes the influence of various adhesive materials, joint designs, and manufacturing methods using numerical modeling methods, validated with analytical approaches and ASTM standard testing. Numerical modeling is conducted using the finite element method with a cohesive zone model (CZM) approach to examine stress distribution in various cases, such as the impact of geometry, adhesive thickness, and joint length. The normal and shear stress distribution along the joint is found to significantly affect the strength of the SLJ, highlighting the importance of careful design and material selection in these applications.
Numerical Modeling of Stress Ratios in Single-Lap Adhesive Joints with Geometrical Modifications Asep Kurnia; Ichsan Setya Putra; Hendri Syamsudin; Muhamad Giri Suada; Oktavianus Demas Priambudi
Advance Sustainable Science Engineering and Technology Vol. 8 No. 3 (2026): May - July
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v8i3.2516

Abstract

This study aims to analyze the effect of variations in aluminum strip geometry and Araldite adhesive on the mechanical strength of single lap joints. A two-dimensional numerical model was developed in Abaqus/Standard using cohesive zone elements, the Benzeggagh-Kenane (B-K) model, and a quadratic stress criterion to validate the experimental results. The results show that the developed model is capable of accurately describing the stress distribution and the effect of secondary bending moments through the ratio of normal stress to shear stress. The application of chamfer geometry to the adhesive area proved to be effective in reducing secondary bending moments and increasing joint resistance. A comparison between the experimental and numerical simulation results showed a deviation of less than 15.5%, confirming the validity of this model. This study highlights the importance of geometric optimization in improving the mechanical strength and reliability of adhesive joints.
Analysis of the Integrated Smart Maintenance System to Support Aircraft Readiness in Air Defense Facing Regional Crises Randy Novian; Asep Setiawan; Usni Hasanudin; Asep Kurnia
Indonesian Journal of Multidisciplinary Science Vol. 5 No. 4 (2026): Indonesian Journal of Multidisciplinary Science
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/ijoms.v5i4.1254

Abstract

This research examines the necessity and implementation of the Integrated Smart Maintenance System (ISMS) as a strategic solution to enhance the aircraft readiness of the Indonesian National Armed Forces (TNI) amidst the growing complexity of regional and global security challenges. The study is grounded in the fact that the current aircraft maintenance system within TNI remains reactive, fragmented, and lacks predictive capabilities supported by artificial intelligence. These limitations result in high aircraft downtime, delayed logistics support, and inefficiencies that directly affect Indonesia’s air defense credibility. The study employs a qualitative approach using a case study method, combining in-depth interviews with TNI logistics officials, aircraft technicians, and defense industry stakeholders (PT Dirgantara Indonesia and GMF AeroAsia), along with comprehensive document analysis and literature review. The theoretical framework encompasses Regional Security Theory (Buzan & Wæver), Air Defense Theory, Maintenance Theory (Tjiptono & Diana), Information System Theory (McLeod), and strategic planning and forecasting concepts. The findings reveal fundamental weaknesses in TNI’s maintenance system, including poor data integration, the absence of predictive algorithms, limited spare parts availability, and weak coordination across services and industry. Nevertheless, SWOT analysis indicates strong opportunities for ISMS development, supported by defense modernization initiatives, national industrial readiness, and the advancement of digital technologies such as AI, IoT, and data analytics. ISMS is projected to increase aircraft readiness to 70–80%, reduce downtime, strengthen deterrence capability, and establish a digital maintenance culture within TNI.
Co-Authors Asep Setiawan Hadi, Bambang Kismono Ichsan Setya Putra Oktavianus Demas Priambudi Randy Novian Suada, Muhamad Giri Syamsudin, Hendri Usni Hasanudin