Europhys. Lett.
Volume 76, Number 4, November 2006
Page(s) 588 - 594
Section Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics
Published online 20 October 2006
Europhys. Lett., 76 (4), pp. 588-594 (2006)
DOI: 10.1209/epl/i2006-10328-9

Fracture of soft cellular solids -Case of non-crosslinked polyethylene foam

Y. Shiina, Y. Hamamoto and K. Okumura

Department of Physics, Graduate School of Humanities and Sciences Ochanomizu University - 2-1-1, Otsuka, Bunkyo-ku, Tokyo 112-8610, Japan

received 14 May 2006; accepted in final form 27 September 2006
published online 20 October 2006

Fracture mechanical properties of hard cellular solids (porous materials) with the Young modulus E larger than 3000$\un{MPa}$ have been well understood; scaling relations between fracture mechanical quantities and porosity are established, which can be explained by a theory based on the geometrical parameters of a cellular solid. In this study, we obtain experimentally the fracture energy of a very soft polyethylene foam with E around 1$\un{MPa}$. We find scaling laws different from those for hard foams, which can be understood by considerations independent of the structural parameters of foams.

46.50.+a - Fracture mechanics, fatigue and cracks.
81.05.Rm - Porous materials; granular materials.
82.35.Lr - Physical properties of polymers.

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