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All Journal Formosa Journal of Computer and Information Science
Azry Ayu Nabilah
Institut Teknologi Sumatera
Computer Science & IT

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Transient Analysis of EVA Foam Damping and Spatial Optimization of FSR Sensors on Shain Guards Fahrizal Akbar Herbhakti; Africo Ramadhani; Erny Amalia Lestari; Azry Ayu Nabilah; Muhamad Ihsan Hufadz
Formosa Journal of Computer and Information Science Vol. 5 No. 1 (2026): March 2026
Publisher : PT FORMOSA CENDEKIA GLOBAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55927/fjcis.v5i1.16645

Abstract

Embedding Force Sensitive Resistors (FSR) into EVA foam for smart shin guards is hindered by stiffness mismatch between the soft matrix and rigid sensor. This study determines the optimal embedment depth that balances signal fidelity and structural integrity. Coupled multiphysics FEM simulations (COMSOL) employing a hyper elastic Mooney-Rivlin model and piezoresistive equations were run under a 1500 N peak Gaussian impact pulse. At 2 mm depth, sensitivity reached –85% ΔR but shear stress peaked at a critical 42.5 MPa; 8 mm depth was very safe (12.4 MPa) but gave a weak –25% ΔR. The optimum depth was 5 mm, yielding 24.8 MPa shear stress, –62% sensitivity, 2.5 ms latency, and high SNR. Sensitivity analysis and numerical optimization confirmed this sweet-spot. The computational framework provides precise parameters for manufacturing IoT-enabled smart shin guards.
Co-Authors Africo Ramadhani Erny Amalia Lestari Fahrizal Akbar Herbhakti Hufadz, Muhamad Ihsan