Claim Missing Document
Check
Articles

Found 2 Documents
Search

Investigation of discrepancies in isotropic material and structural properties in lattice frameworks Ahmad Anas Arifin; I Made Londen Batan; Michele Bici; Arif Wahjudi; Agus Sigit Pramono
Mechanical Engineering for Society and Industry Vol 5 No 1 (2025)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/mesi.13018

Abstract

Lattice structures have developed as a vital component in advanced engineering applications due to their superior strength-to-weight ratios and adjustable mechanical properties. This paper focuses on examining the correlation between the isotropic features of lattices at the material level and their structural performance. The research used near-isotropic Crossing-cylinder (CC)- Body Centered Cubic (BCC) cells in various orientations and sizes. Both experimental analysis and finite element analysis were used to examine the compressive strength of the structure in each orientation. The results reveal that cell orientation is important for determining failure modes and mechanical performance at the structural level. At 0°, the lattice has higher compressive strength and energy absorption due to effective load transfer via CC-aligned struts. In contrast, higher orientations (e.g., 15°, 30°, and 45°) are dominated by collapse-type failures, indicating anisotropic behavior in an otherwise isotropic design. Smaller cell sizes have more strength at lower orientations due to their higher relative density, but larger cells perform better at higher orientations.
The Effect of Perpendicular Lamp Position on Normal Plane Alignment for Light Distribution and Coverage in Adaptive Headlamps During Complex Driving Scenarios Ian Hardianto Siahaan; I Nyoman Sutantra; I Made Londen Batan
Automotive Experiences Vol. 8 No. 3 (2025)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.14602

Abstract

Due to decreased visibility and an increased chance of accidents, driving at night requires increased vigilance. Drivers must be equipped to handle various road and terrain conditions, such as declines, inclines, turns, straight paths, and combinations. Following the law and ethical driving standards is crucial in these circumstances. Inadequate street illumination, poor lighting, and inexperienced drivers are all common causes of accidents. The risks increase at night when little ambient lighting reduces visibility. This study investigates the distribution of light intensity and illumination radius via a factorial design derived from headlamp activation configuration scenarios, simulated in MATLAB software, and validated using experimental test results. The results show that driver focus and vision range improve dramatically, particularly when the lights are triggered on flat roads, during turns, climbs, and combinations of these actions, by the New ADHL's headlamp activation configuration. Simulation-based activation of main and auxiliary light configurations shows that the New ADHL outperforms traditional headlamps, effectively addressing insufficient illumination to prevent nighttime accidents and providing a coverage radius of more than 3.5 m at the lowest intensity detectable by the driver.