Volume change in polyetheretherketone under compression loads over wide ranges of strain rate and temperature

Autor:	Ramzi Othman, Zakaria El-Qoubaa
Rok vydání:	2014
Předmět:	Materials science Strain (chemistry) Applied Mathematics Mechanical Engineering Split-Hopkinson pressure bar Plasticity Strain rate Volume change Residual Compression (physics) Volume (thermodynamics) Mechanics of Materials Modeling and Simulation sense organs Composite material
Zdroj:	The Journal of Strain Analysis for Engineering Design. 49:315-324
ISSN:	2041-3130 0309-3247
DOI:	10.1177/0309324713515464
Popis:	Although the understanding of volume change is of crucial importance to analyze and model the mechanical behavior of polymeric materials, it is highly understudied in the open literature. This article deals with the assessment of the volume change in polyetheretherketone when submitted to compressive loads. The volume change is measured by the end of mechanical tests before and after unloading. Therefore, the total (before unloading) and residual (after loading) volume changes are measured for strain rates ranging from 10−4 to 3000 s−1 and temperatures ranging from +133 to +433 K, that is, −140 °C to+160 °C. It is demonstrated that the total volume is almost constant in terms of the axial strain independent of strain rate and temperature. The residual volume slightly increases with increasing axial strain. This conclusion is obtained either by direct measurements or by a simplified model developed in this article. However, the volume change is softly affected by the specimen geometry.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0fcc73481a395e77f9340b079545ecbf https://doi.org/10.1177/0309324713515464 Zobrazit plný text záznamu