Page 42 - eBook_Proceedings of the International Conference on Digital Manufacturing V1

Proceedings of the International Conference on Digital Manufacturing –
Volume 1

Figure 3 provides visual documentation of the experimental
setup, highlighting the critical phases of specimen preparation.

FINITE ELEMENT MODELLING ANALYSIS

Computational Modelling Setup and Objectives

To complement the experimental findings and evaluate the
feasibility of utilising recycled HDPE in furniture applications,
finite element analysis (FEA) simulations were employed. The
primary objective of the computational modelling phase was to
predict the structural behaviour of an ergonomic stool fabricated
from recycled HDPE, supported by a stainless-steel framework
under realistic loading conditions.

Geometry and Material Definition

The computational model accurately represented the designed
stool, including precise dimensions informed by ergonomic
considerations and material availability. The stainless-steel
framework was modelled using hollow square-section tubing with
dimensions 25.40 mm × 25.40 mm and wall thickness of 5 mm,
selected to balance structural rigidity with weight minimisation.
HDPE, selected for its flexible yet durable characteristics, formed
the stool's seating surface.

Accurate mechanical properties for both materials were
incorporated into the model as shown in Table 4, ensuring realistic
simulation outcomes. The selected properties reflected typical
mechanical values available in established literature.

Table 4: Mechanical Properties of Material

Material Young Modulus Poisson’s Ratio

Stainless Steel 190 GPa 0.265
HDPE 2.59 MPa 0.40

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