HDPE Creep
Polyethylene (PE) is increasingly used in structural applications due to its light weight and rust-resistant nature. With growing demand for the use of PE as a structural material, there is a need for mathematical models that describe the mechanical behavior of this material. Creep is an important property of structural materials especially plastics. Curve fitting using a linear time-dependent model is a common approach for modeling creep of PE at the macrostructural level. However, besides the point estimates of the model parameters and the (visual) fit of the model to experimental data, little else is learned from the curve-fitting approach. (Cheng et al, Polymer Engineering & Science, 51, #7, 1227-1235 (2011)
Creep
High Density Polyethylene (HDPE)
Polyethylene
Polymers /Resins
Polyolefins
Recent Journal Articles
An alternative approach to estimating parameters in creep models of high-density polyethylene
(1227–1235) Polymer Engineering & Science 51 #7 (2011)
Cheng, Polak and Penlidis of the University of Waterloo, Canada, used a rigorous statistical approach for modeling creep compliance of polyethylene (PE). Four high-density PE resins used over a wide range of applications are studied. Linear viscoelastic modeling using the multi-Kelvin element theory is examined in two forms: model linear in parameters and model nonlinear in parameters. With the application of valid statistical techniques, complex relationships between model parameters, largely unstudied before, are observed, such as evidence of a high degree of correlation among material parameters of the creep model. (RDC 6/24/2011)