Page 44 - eBook_Proceedings of the International Conference on Digital Manufacturing V1

Proceedings of the International Conference on Digital Manufacturing –
Volume 1

Figure 4 illustrates the spatial distribution of the von Mises
stress across the computational model, clearly highlighting
regions of structural vulnerability and robustness. These insights
significantly contribute to iterative design improvements,
emphasising targeted reinforcement strategies to ensure structural
integrity, ergonomic suitability, and prolonged durability, in line
with contemporary sustainable design practices. The tensile test
results showed a clear dependence on processing temperature,
with mechanical performance peaking at 150 °C. At this
condition, the recycled HDPE specimens demonstrated an average
tensile strength of 20.8 MPa and elongation at break of 8.83 mm.
The stress–strain profiles revealed a ductile behaviour
characteristic of thermoplastic polymers, with the highest
modulus recorded at approximately 2.59 GPa. The standard
deviation in tensile strength was ±0.8 MPa, indicating good
repeatability.

Figure 4: Von Mises stress distribution indicating maximum stress
concentrations at interfaces between the HDPE seating component
and metallic support structure, contrasted with significantly lower
stress values at peripheral structural elements.

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