Analisa Fatik Pengaruh Penambahan Lapisan Pegas Daun dengan Variasi Pembebanan pada Truk Mitsubishi Canter 136 Ps menggunakan Ansys

Abstract

Leaf springs in trucks play a critical role in absorbing vibrations and dynamic loads but are prone to fatigue failure, especially in regions with uneven road conditions, such as North Sumatra. This study analyzes the effect of adding leaf spring layers (from 6 to 8 layers) and load variations (4500 kg, 5500 kg, 6500 kg) on fatigue resistance using Finite Element Analysis (FEA) simulations in ANSYS 2020 R2 and SolidWorks. Key findings reveal Increased load significantly reduces fatigue life. At 4500 kg, the life cycle reaches hundreds of thousands of cycles, whereas at 6500 kg, it drops drastically to hundreds of cycles in critical areas. The highest alternating stress occurs at the spring ends and connection points, with a safety factor below 0.1 under maximum load, indicating high failure risk. The 8-layer configuration demonstrates superior performance, with longer fatigue life, lower stress, and more stable safety factors compared to the 6-layer design. The study concludes that 8layer leaf springs are recommended for heavy-duty truck applications to enhance fatigue resistance.