The development of the bending test machine prototype for wood and bamboo structures

Authors

  • Jonathan Bryan Sampoerna University
  • Raditya Edra Raja Handika Sampoerna University
  • Jarvis Eros Lananggalih Sampoerna University
  • Michael Harlen Sampoerna University
  • Sean Nabill Van Der Heijden Sampoerna University
  • Farid Triawan Sampoerna University
  • Kushendarsyah Saptaji Sampoerna University
  • Ignatius Budi Sutanto Hadisujoto Sampoerna University

Keywords:

bending test, machine manufacture, stress analysis, structural test, wood and bamboo

Abstract

This study presents the development of a low-cost, portable bending test machine specifically designed to evaluate the mechanical properties of wood and bamboo, with a focus on providing an accessible solution for small-scale users and researchers. The machine employs a standard three-point bending configuration, equipped with digital sensors to capture accurate load and deflection data. Meanwhile, an automated grading algorithm facilitates objective assessment. The prototype was modelled in SOLIDWORKS for precision in design and subsequently fabricated using a combination of wood and 3D-printed Polylactic acid (PLA) components to ensure affordability and portability. A Raspberry Pi microcontroller was integrated to enable real-time data acquisition and processing, enhancing usability in both laboratory and field settings. Through optimized linear regression supported by Singular Value Decomposition (SVD), the system calculates effective critical mechanical properties such as Young’s modulus with a high degree of accuracy. This innovation provides a practical, efficient, and user-friendly alternative to conventional testing equipment, offering significant potential for material classification, quality control, and advancing sustainable construction practices by promoting the use of renewable resources like wood and bamboo.

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Published

2025-10-06

Issue

Vol. 3 No. 1 (2025)

Section

Articles