TY - GEN
T1 - A 3D constitutive wood model using the concepts of continuum damage mechanics
AU - Sandhaas, Carmen
AU - Van De Kuilen, Jan Willem G.
AU - Blass, Hans J.
PY - 2012
Y1 - 2012
N2 - Wood is heterogeneous, highly anisotropic and shows ductile behaviour in compression and brittle behaviour in tension and shear. Timber joints with their simultaneous ductile and brittle failure modes still present a major challenge for modelling. A 3D material model for wood based on continuum damage mechanics was developed and implemented via a subroutine into a standard FE framework. Eight stress-based failure criteria were derived in order to formulate piecewise defined failure surfaces. The damage development was controlled by nine damage variables that were inserted in the damage operator. Mesh dependency issues connected with softening continuum approaches were addressed. Embedment and joint tests using three different wood species (spruce, beech, azobé) were carried out whose results were compared to modelling outcomes. The failure modes could be identified and the general shape of the load-displacement curves agreed with the experimental outcomes.
AB - Wood is heterogeneous, highly anisotropic and shows ductile behaviour in compression and brittle behaviour in tension and shear. Timber joints with their simultaneous ductile and brittle failure modes still present a major challenge for modelling. A 3D material model for wood based on continuum damage mechanics was developed and implemented via a subroutine into a standard FE framework. Eight stress-based failure criteria were derived in order to formulate piecewise defined failure surfaces. The damage development was controlled by nine damage variables that were inserted in the damage operator. Mesh dependency issues connected with softening continuum approaches were addressed. Embedment and joint tests using three different wood species (spruce, beech, azobé) were carried out whose results were compared to modelling outcomes. The failure modes could be identified and the general shape of the load-displacement curves agreed with the experimental outcomes.
KW - 3D constitutive model wood
KW - Continuum damage mechanics (CDM)
KW - Finite element method
UR - http://www.scopus.com/inward/record.url?scp=84871638743&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84871638743
SN - 9783950353709
T3 - ECCOMAS 2012 - European Congress on Computational Methods in Applied Sciences and Engineering, e-Book Full Papers
SP - 1451
EP - 1466
BT - ECCOMAS 2012 - European Congress on Computational Methods in Applied Sciences and Engineering, e-Book Full Papers
T2 - 6th European Congress on Computational Methods in Applied Sciences and Engineering, ECCOMAS 2012
Y2 - 10 September 2012 through 14 September 2012
ER -