High-density fibreboard (HDF) is an engineered wood-based material with potential for use in non-invasive biomedical engineering applications, particularly in applications involving assistive and supportive devices, external structures, equipment supports, housings, work surfaces and other components that do not enter the human body. This study assessed the force-at-yield characteristics of selected HDF products available in the Nigerian market to provide mechanical-performance information for their potential use in such applications as a result of desired need due to properties including their thermal comfort and suitability as compared to plastics and other materials. Three commercially and most commonly available HDF products, namely Sinoply, Dabar and Joubert, were evaluated using four replicate specimens per product according to testometric testing machine requirement while conforming to ASTM D1037 standard. The force-at-yield was determined under controlled laboratory testing conditions, and the resulting data were analysed using descriptive statistics, one-way analysis of variance (ANOVA), Tukey’s honestly significant difference (HSD) post-hoc test and pairwise Cohen’s d. The mean force-at-yield values were 882.40 ± 0.18 N for Sinoply, 722.90 ± 0.18 N for Dabar and 343.00 ± 0.18 N for Joubert. One-way ANOVA revealed a statistically significant difference in force-at-yield among the three HDF products, F(2,9) = 9,214,332.40, p < 0.001. Tukey’s HSD test further established significant differences between all product pairs (p < 0.001). The findings demonstrate substantial differences in the force-at-yield performance of HDF products available in the Nigerian market and provide useful mechanical data for material selection and preliminary design of orthotics and other non-invasive biomedical engineering components. The results also indicate the need for application-specific evaluation of other relevant properties before HDF products are incorporated into biomedical engineering equipment or structures.

Keywords: Force-at-Yield, High-density fibreboard (HDF), Mechanical Properties, No-Invasive Biomedical Engineering, Plastic Deformation, Sustainable Materials, Tukey’s HSD.