Table 1.

Constants of empirical relationships for HDPE tensile properties.

Property	Symbol	$\mathit{A}$	$\mathit{B}$	$\mathit{C}$	$\mathit{D}$	${\mathit{R}}^{\mathbf{2}}$	RMSE
Elastic Modulus, MPa	$E$	0.11	−27.7	192.4	2253	0.94	157
Ultimate Tensile Strength, MPa	$S_u$	8.75 × 10−4	−0.341	2.68	36.0	0.98	1.06
Tensile Yield Strength, MPa	$S_y$	6.65 × 10−4	−0.189	1.22	15.4	0.94	1.18