Gunji Bala Murali

Purpose: The purpose of this research work is to introduce the augmented reality (AR) technology in disassembly operation to reduce the efforts of disassembly and time of disassembly. Design/methodology/approach: In this research paper, Dijkstra's algorithm is applied to find an optimal disassembly sequence for car jack assembly. Based on the obtained disassembly sequence, the product is to be dismantled using a manual approach and with AR approach for a 3D printed car jack assembly to carry a comparison study in terms of time of disassembly and easiness. Findings: In this paper, for generating optimal disassembly sequences, Dijkstra star graph algorithm is used. To carry the disassembly operation, AR approach is used. Originality/value: The approach used here to execute the disassembly operation is novel due to its integration of the AR technology. As per the reviewed literature, no prior work has incorporated such integration to perform disassembly operations.

This work introduces a unique bio-inspired gyroid lattice structure for acoustic applications and its experimental evaluation. A novel bio-inspired structure was created and printed using SLA 3D printing by fusing re-entrant honeycomb geometry with a Triply Periodic Minimal Surface (TPMS) gyroid. The design considered key parameters such as the number of unit cells, wall thickness, and lattice size (30 mm cube) to optimize mechanical and acoustic performance. In vibration experiments conducted under free-free boundary conditions, the novel bio-inspired lattice outperformed conventional gyroid and hexagonal honeycomb structures in terms of damping performance (ζ = 0.21212) and effective vibration isolation. The findings show that these bio-inspired lattices have the potential to be used in engineering applications for advanced acoustic control and noise reduction.

This study presents a systematic comparison of four triply periodic minimal surface (TPMS) structures—Gyroid, Diamond, Primitive, and I-WP—fabricated using stereolithography (SLA) for multifunctional engineering applications. Through comprehensive experimental evaluation of airflow resistivity and mechanical properties, we demonstrate how topological design governs critical performance trade-offs between fluid permeability and structural integrity. The specimens were characterized under controlled loading and flow conditions to assess stiffness, strength, and pressure drop behavior. Among the tested architectures, Diamond structures exhibit superior characteristics for applications requiring both efficient fluid flow and high load-bearing capacity due to their balanced curvature and robust nodal connectivity. Gyroid configurations show versatile and well-balanced multifunctional performance, making them suitable for systems that demand both mechanical stability and moderate permeability. In contrast, Primitive and I-WP structures display intermediate performance with distinct advantages for specialized applications such as acoustic damping or controlled ventilation. The results reveal that pore connectivity, wall thickness, and mean surface curvature critically influence airflow resistance, while structural hierarchy and periodic symmetry determine mechanical stability. These findings provide fundamental insights into structure–property relationships in TPMS lattices and establish practical guidelines for selecting optimal cellular architectures in thermal management systems, energy absorbers, and lightweight structural components. Overall, the study establishes a comprehensive framework for designing TPMS-based solutions that simultaneously optimize ventilation efficiency, energy dissipation, and mechanical performance in advanced engineering applications

This work introduces a unique bio-inspired gyroid lattice structure for acoustic applications and its experimental evaluation. A novel bio-inspired structure was created and printed using SLA 3D printing by fusing re-entrant honeycomb geometry with a Triply Periodic Minimal Surface (TPMS) gyroid. In vibration experiments conducted under free-free boundary conditions, the novel bio-inspired lattice outperformed conventional gyroid and hexagonal honeycomb structures in terms of damping performance (ζ = 0.21212) and effective vibration isolation. The findings show that these bio-inspired lattices have the potential to be used in engineering applications for advanced acoustic control and noise reduction.

Currently, researchers are seeking to pay more attention to lightweight designs to minimize the materials used and greatly improve the strength of designs to increase their loading capacity in engineering applications. Bio-inspired patterns are given more attention in the design of these lightweight structures. In this current study, tensile specimens are fabricated as per the ASTM D638-IV standard and through the VAT photopolymerization technique with different bio-inspired patterns like honeycomb, re-entrant, and spider web structures, with unit cell sizes of 4 mm and 6 mm, respectively. Tensile tests are conducted on all the specimens, and all the test results are compared and evaluated to determine the one with the best performance. It was concluded that the 4 mm unit cell size specimens performed well, and spider web structures were shown to have especially satisfactory performance.

Growth in the advancement of 3D printing technology has made it easy to fabricate complicated bio-inspired structures (BISs). In this paper, the sandwich structure of the beetle elytron structure (BES) hollow cylinder, influencing every corner of the honeycomb structure, is designed by considering parameters like the thickness, length, and diameter of the hollow cylinder, with the different ranges taken giving minimum and maximum values in the response surface methodology (RSM). Sandwich structures are fabricated using VAT polymerization technology. A Universal Testing Machine (UTM) tests the fabricated structures for compression, and results are recorded from the tests of each specimen. All specimens’ compressive strength (CS) and energy absorptions (EA) values are calculated. Design parameters at which the energy absorbed and the compression strength are high are evaluated and considered optimal parameters for a specific range of values.