Finite element analysis of the effects of density reduction on impact protection in eco-friendly natural rubber latex cushions

Name: Theerapat Taweebraksa

Organization : Suranaree University of Technology. School of Polymer Engineering

Name: Keerati Sulaksna

Organization : Suranaree University of Technology. School of Mechanical Engineering

Name: Saowapa Chaiwong

Organization : Mae Fah Luang University. School of Agro-Industry

Name: Tatiya Trongsatitkul

Organization : Suranaree University of Technology. School of Polymer Engineering

keyword: Natural rubber

LCSH: Cushioning materials

; Eco-friendly products

LCSH: Finite element method

LCSH: Foam rubber

LCSH: Impact testing

Abstract: An eco-friendly cushion foam net made from natural rubber latex has been developed to address environmental concerns, but its high weight presents a challenge. The aim is to optimize the weight of NRLF by reducing its density while maintaining cushioning performance. Two primary approaches are examined: increasing internal voids within the foam (densities of 420, 397, and 345 kg/m³), and reducing the number of cushion filaments (25, 20, and 15 filaments) used in the material. The research aims to identify the optimal balance between minimizing weight and preserving cushioning effectiveness. A Glom Sali guava (250 g) was used as a model fruit. Dropping guavas from heights up to 100 mm. SolidWorks®, ANSYS® was used to generate a model and was used in the finite element method study software. The cushion's density and absorption capacity significantly influenced its ability to reduce maximum stress. The results of the drop test simulation showed that decreases in density and filament number significantly increased the maximum impact stress on the guava fruit by 93%-94%. The maximum stress, ranging from 0.0566 to 0.0653 MPa, was observed at 0.013 s after impact. This research explains the influence of cushion density and filament effect on guava impact protection

King Mongkut's University of Technology North Bangkok. Central Library

Address: BANGKOK

Email: library@kmutnb.ac.th

Created: 2025

Modified: 2025-10-28

Issued: 2025-10-28

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BibliograpyCitation : In The Chemical Society of Thailand under the Patronage of Professor Dr. Her Royal Highness Princess Chulabhorn Krom Phra Srisavangavadhana and Suranaree University of Technology. Institute of Science. School of Chemistry. Pure and Applied Chemistry International Conference 2025 (PACCON 2025) (pp.633-640). Bangkok : The Chemical Society of Thailand under the Patronage of Professor Dr. Her Royal Highness Princess Chulabhorn Krom Phra Srisavangavadhana in association with the School of Chemistry, Institute of Science, Suranaree University of Technology, 2025

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