MULTIAXIAL INVESTIGATION OF PVC FOAMS AND ANALYSIS OF THE DEFORMATION MECHANISM BY 3D-DIC

Authors

  • Francesca Concas Saarland University, Institute of Applied Mechanics, Campus A4.2, 66123 Saarbrücken, Germany
  • Stefan Diebels Saarland University, Institute of Applied Mechanics, Campus A4.2, 66123 Saarbrücken, Germany
  • Anne Jung Saarland University, Institute of Applied Mechanics, Campus A4.2, 66123 Saarbrücken, Germany

DOI:

https://doi.org/10.14311/APP.2019.25.0006

Keywords:

Polymeric foam, multiaxial testing, three-dimensional digital image correlation

Abstract

Closed-cell polyvinylchloride (PVC) foams are widely used as core for sandwich composites for applications, in which multiaxial loads are involved. In the present work a wide range of uniaxial (tension, compression and torsion) and multiaxial experiments (both simultaneous tension-torsion and compression-torsion) were conducted on a high performance PVC foam. Failure data for each experiment were collected and depicted in the invariants plane. The whole cylindrical surface of the specimen was monitored by means of an 8-camera-system, strain fields were obtained by 3D-DIC. Hence, the occurrence and the evolution of deformation bands were inspected. The usage of an 8-camera system was essential for the observation of the deformation mechanism, especially for pure compression, pure torsion and combined axial load-torsion, in which the arising of deformation bands is affected by the occurrence of buckling and the orthotropy of the foam.

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Published

2019-12-06

Issue

Vol. 25 (2019): 17th YOUTH SYMPOSIUM ON EXPERIMENTAL SOLID MECHANICS

Section

Articles

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