WASET
	%0 Journal Article
	%A Jonas Engqvist and  Per Hard af Segerstad and  Birger Bring and  Mathias Wallin
	%D 2012
	%J International Journal of Mechanical and Mechatronics Engineering
	%B World Academy of Science, Engineering and Technology
	%I Open Science Index 68, 2012
	%T A Visco-elastic Model for High-density Cellulose Insulation Materials
	%U https://publications.waset.org/pdf/1278
	%V 68
	%X A macroscopic constitutive equation is developed for a high-density cellulose insulation material with emphasis on the outof- plane stress relaxation behavior. A hypothesis is proposed where the total stress is additively composed by an out-of-plane visco-elastic isotropic contribution and an in-plane elastic orthotropic response. The theory is validated against out-of-plane stress relaxation, compressive experiments and in-plane tensile hysteresis, respectively. For large scale finite element simulations, the presented model provides a balance between simplicity and capturing the materials constitutive behaviour.

	%P 1796 - 1799