Fracture of soft cellular solids -Case of non-crosslinked polyethylene foamY. 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 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. 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.
© EDP Sciences 2006