Simulation and Analysis of the Loading, Relaxation, and Recovery Behavior of Polyethylene and Its Pipes DOI Open Access
Furui Shi, P.‐Y. Ben Jar

Polymers, Год журнала: 2024, Номер 16(22), С. 3153 - 3153

Опубликована: Ноя. 12, 2024

Spring–dashpot models have long been used to simulate the mechanical behavior of polymers, but their usefulness is limited because multiple model parameter values can reproduce experimental data. In view this limitation, study explores possibility improving uniqueness so that parameters be establish relationship between deformation and microstructural changes. An approach was developed based on stress during loading, relaxation, recovery polyethylene. total, 1000 sets were determined for fitting data from relaxation stages with a discrepancy within 0.08 MPa. Despite small discrepancy, showed wide range variation, one parameter, σv,L0, followed two distinct paths rather than random distribution. The five selected discrepancies below 0.04 MPa found highly consistent, except characteristic time. Therefore, concludes improved characterize This then quasi-static four polyethylene pipes, which these pipes had very close stress. indicates spring–dashpot model, enabling further using polyethylene’s changes deformation.

Язык: Английский

Characterization of Polycarbonate and Glass-Filled Polycarbonate Using Multi-Relaxation Test—Role of Glass Fiber on Viscous Behavior of Matrix in Fiber Composites DOI Open Access
Jingchao Wang, P.‐Y. Ben Jar

Polymers, Год журнала: 2025, Номер 17(11), С. 1469 - 1469

Опубликована: Май 26, 2025

The work presented here describes an approach that separates the viscous stress from quasi-static counterpart for polycarbonate (PC) and its short glass fiber composite (GF-PC), with aim to characterize influence of on behavior PC as matrix GF-PC. A multi-relaxation (MR) test was used mechanical testing a three-branch spring–dashpot model data analysis, using genetic algorithm establish 100 sets fitting parameter values enabled regenerate measured decay during relaxation. Using spring modulus Kv,s short-term branch in model, two groups these were established function specimen displacement (named stroke) GF-PC, one which shows trend is similar corresponding parameters pure PC, thus believed reflect study concludes increases stress, but role long-term marginal.

Язык: Английский

Процитировано

0
Simulation and Analysis of the Loading, Relaxation, and Recovery Behavior of Polyethylene and Its Pipes DOI Open Access
Furui Shi, P.‐Y. Ben Jar

Polymers, Год журнала: 2024, Номер 16(22), С. 3153 - 3153

Опубликована: Ноя. 12, 2024

Spring–dashpot models have long been used to simulate the mechanical behavior of polymers, but their usefulness is limited because multiple model parameter values can reproduce experimental data. In view this limitation, study explores possibility improving uniqueness so that parameters be establish relationship between deformation and microstructural changes. An approach was developed based on stress during loading, relaxation, recovery polyethylene. total, 1000 sets were determined for fitting data from relaxation stages with a discrepancy within 0.08 MPa. Despite small discrepancy, showed wide range variation, one parameter, σv,L0, followed two distinct paths rather than random distribution. The five selected discrepancies below 0.04 MPa found highly consistent, except characteristic time. Therefore, concludes improved characterize This then quasi-static four polyethylene pipes, which these pipes had very close stress. indicates spring–dashpot model, enabling further using polyethylene’s changes deformation.

Язык: Английский

Процитировано

0