Measuring fracture energy in a brittle polymeric material

Kazuo Arakawa, T. Mada

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The dynamic fracture behavior of a brittle polymer, polymethyl methacrylate (PMMA), was studied using single-edge-cracked tensile specimens and the method of caustics in combination with high-speed photography. The dynamic response of the specimen and the state of local stress near the crack tip, i.e., the stress intensity factor K, were measured. To analyze the dynamic response, the external work, Uex, applied to the specimen was partitioned into three components: the elastic energy, Ee; non-elastic energy, En, due to viscoelastic and plastic deformation; and fracture energy, Ef, for creating a new fracture surface, As. The results showed that Ee, En, and Ef increased with Uex, and the ratio Ef/Uex was about 46% over a wide range of Uex. Energy release rates were estimated using Gt = Uex/As and Gf = Ef/As. The mean energy release rate, Gm, during dynamic crack propagation was also determined using the value of K. A good correlation between Gf and Gm was found.

Original languageEnglish
Pages (from-to)347-353
Number of pages7
JournalExperimental Mechanics
Volume46
Issue number3
DOIs
Publication statusPublished - Jun 1 2006

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Fracture energy
Energy release rate
Dynamic response
High speed photography
Polymers
Polymethyl methacrylates
Stress intensity factors
Crack tips
Crack propagation
Plastic deformation

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Measuring fracture energy in a brittle polymeric material. / Arakawa, Kazuo; Mada, T.

In: Experimental Mechanics, Vol. 46, No. 3, 01.06.2006, p. 347-353.

Research output: Contribution to journalArticle

Arakawa, Kazuo ; Mada, T. / Measuring fracture energy in a brittle polymeric material. In: Experimental Mechanics. 2006 ; Vol. 46, No. 3. pp. 347-353.
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