Excellence in Research and Innovation for Humanity

Per Hard Af Segerstad

Publications

1

Publications

1
1278
A Visco-elastic Model for High-density Cellulose Insulation Materials
Abstract:

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.

Keywords:
Cellulose insulation materials, constitutive modelling, material characterisation, pressboard.