Damage characterization for particles filled semi-crystalline polymer
1 University of Valenciennes and Hainaut Cambrésis LAMIH, UMR CNRS 8201, 59313 Valenciennes, France
2 KTH Royal Institute of Technology, Division of Highway and Railway Engineering, 10044 Stockholm, Sweden
3 TOYOTA MOTOR EUROPE, 1140 Brussels, Belgium
a Corresponding author: email@example.com
Published online: 7 September 2015
Damage evolution and characterization in semi-crystalline polymer filled with particles under various loadings is still a challenge. A specific damage characterization method using Digital Image Correlation is proposed for a wide range of strain rates considering tensile tests with hydraulic jacks as well as Hopkinson's bars. This damage measurement is obtained by using and adapting the SEE method  which was developed to characterize the behaviour laws at constant strain rates of polymeric materials in dynamic. To validate the characterization process, various damage measurement techniques are used under quasi-static conditions before to apply the procedure in dynamic. So, the well-known damage characterization by loss of stiffness technique under quasi-static loading is applied to a polypropylene. In addition, an in-situ tensile test, carried out in a microtomograph, is used to observe the cavitation phenomenon in real time. A good correlation is obtained between all these techniques and consequently the proposed technique is supposed suitable for measuring the ductile damage observed in semi-crystalline polymers under dynamic loading. By applying it to the semi-crystalline polymer at moderate and high speed loadings, the damage evolution is measured and it is observed that the damage evolution is not strain rate dependent but the failure strain on the contrary is strain rate dependent.
© Owned by the authors, published by EDP Sciences, 2015
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