In Situ Analysis of Crack Propagation in Polymer Foams

Elio E. Saenz; Leif A. Carlsson; Anette M Karlsson

doi:10.1007/s10853-011-5491-y

In Situ Analysis of Crack Propagation in Polymer Foams

Elio E. Saenz
, Leif A. Carlsson
, Anette M Karlsson

Florida Atlantic University

Research output: Contribution to journal › Article › peer-review

Abstract

This article presents an experimental study on the microscopic mechanisms associated with crack propagation in closed cell polymer foams. A brittle, slightly cross-linked polyvinyl chloride (PVC) foam of density 60 kg/m ³ and a ductile thermoplastic polyether sulfone (PES) foam of density 90 kg/m ³ were examined. The PVC and PES foams have similar cell size (≈0.7 mm) but the cell edges of the PES foam were much thicker than those in the PVC foam. Overall, it was observed that the elements of both foams fractured in an extensional mode. Crack propagation in the PVC foam was inter-cellular, where agglomerates of very small cells formed a region of weakness. Damaged cell walls were observed on both sides of the crack plane. For the PES foam, craze-like deformation bands were observed in the highly stretched region ahead of the blunted crack tip. Further ahead of the crack tip, highly stretched cells were observed. Fracture occurred predominantly through the center of the cells in the PES foam.

Original language	American English
Journal	Default journal
Volume	46
DOIs	https://doi.org/10.1007/s10853-011-5491-y
State	Published - Aug 1 2011

Disciplines

Mechanical Engineering

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http://journals.ohiolink.edu/ejc/article.cgi?issn=00222461&issue=v46i0016&article=5487_isaocpipf

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title = "In Situ Analysis of Crack Propagation in Polymer Foams",

abstract = " This article presents an experimental study on the microscopic mechanisms associated with crack propagation in closed cell polymer foams. A brittle, slightly cross-linked polyvinyl chloride (PVC) foam of density 60 kg/m 3 and a ductile thermoplastic polyether sulfone (PES) foam of density 90 kg/m 3 were examined. The PVC and PES foams have similar cell size (≈0.7 mm) but the cell edges of the PES foam were much thicker than those in the PVC foam. Overall, it was observed that the elements of both foams fractured in an extensional mode. Crack propagation in the PVC foam was inter-cellular, where agglomerates of very small cells formed a region of weakness. Damaged cell walls were observed on both sides of the crack plane. For the PES foam, craze-like deformation bands were observed in the highly stretched region ahead of the blunted crack tip. Further ahead of the crack tip, highly stretched cells were observed. Fracture occurred predominantly through the center of the cells in the PES foam.",

author = "Saenz, \{Elio E.\} and Carlsson, \{Leif A.\} and Karlsson, \{Anette M\}",

note = "Saenz, E. E., Carlsson, L. A., and Karlsson, A. M., 2011, {"}In Situ Analysis of Crack Propagation in Polymer Foams,{"} Journal of Materials Science, 46(16) pp. 5487-5494.",

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T1 - In Situ Analysis of Crack Propagation in Polymer Foams

AU - Saenz, Elio E.

AU - Carlsson, Leif A.

AU - Karlsson, Anette M

N1 - Saenz, E. E., Carlsson, L. A., and Karlsson, A. M., 2011, "In Situ Analysis of Crack Propagation in Polymer Foams," Journal of Materials Science, 46(16) pp. 5487-5494.

PY - 2011/8/1

Y1 - 2011/8/1

N2 - This article presents an experimental study on the microscopic mechanisms associated with crack propagation in closed cell polymer foams. A brittle, slightly cross-linked polyvinyl chloride (PVC) foam of density 60 kg/m 3 and a ductile thermoplastic polyether sulfone (PES) foam of density 90 kg/m 3 were examined. The PVC and PES foams have similar cell size (≈0.7 mm) but the cell edges of the PES foam were much thicker than those in the PVC foam. Overall, it was observed that the elements of both foams fractured in an extensional mode. Crack propagation in the PVC foam was inter-cellular, where agglomerates of very small cells formed a region of weakness. Damaged cell walls were observed on both sides of the crack plane. For the PES foam, craze-like deformation bands were observed in the highly stretched region ahead of the blunted crack tip. Further ahead of the crack tip, highly stretched cells were observed. Fracture occurred predominantly through the center of the cells in the PES foam.

AB - This article presents an experimental study on the microscopic mechanisms associated with crack propagation in closed cell polymer foams. A brittle, slightly cross-linked polyvinyl chloride (PVC) foam of density 60 kg/m 3 and a ductile thermoplastic polyether sulfone (PES) foam of density 90 kg/m 3 were examined. The PVC and PES foams have similar cell size (≈0.7 mm) but the cell edges of the PES foam were much thicker than those in the PVC foam. Overall, it was observed that the elements of both foams fractured in an extensional mode. Crack propagation in the PVC foam was inter-cellular, where agglomerates of very small cells formed a region of weakness. Damaged cell walls were observed on both sides of the crack plane. For the PES foam, craze-like deformation bands were observed in the highly stretched region ahead of the blunted crack tip. Further ahead of the crack tip, highly stretched cells were observed. Fracture occurred predominantly through the center of the cells in the PES foam.

UR - https://engagedscholarship.csuohio.edu/enme_facpub/111

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DO - 10.1007/s10853-011-5491-y

M3 - Article

VL - 46

JO - Default journal

JF - Default journal

ER -

In Situ Analysis of Crack Propagation in Polymer Foams

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