Computational Multi-scale Constitutive Model for Wood Cellwall and its Application to the Design of Bio-inspiredComposites

摘要

This paper presents a fully coupled multi-scale finite element model for the description of the dissipative me-chanical response of wood cell walls under large strains. Results show the ability of the present model to capture the main phenomenological responses found typically in wood k the microscopic scale. In addition, the struc-tural and mechanical concepts involved in wood cells are exploited further in order to design new wood inspired composites. Numerical tests are conducted in prototypes of bio-inspired composites and demonstrate substantial gains in terms of resistance to failure and in the control of the overall flexibility/stiffness balance in the material.