MULTIAXIAL INVESTIGATION OF PVC FOAMS AND ANALYSIS OF THE DEFORMATION MECHANISM BY 3D-DIC
| Autor: | Stefan Diebels, Anne Jung, Francesca Concas |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Buckling Deformation mechanism Multiaxial testing polymeric foam multiaxial testing three-dimensional digital image correlation lcsh:TA1-2040 General Earth and Planetary Sciences Torsion (mechanics) Deformation bands Failure data Composite material lcsh:Engineering (General). Civil engineering (General) General Environmental Science |
| Zdroj: | Acta Polytechnica CTU Proceedings, Vol 25, Iss 0, Pp 6-11 (2019) |
| ISSN: | 2336-5382 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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