MPM MODELLING OF THE CELLULAR COLLAPSE OF BIO-PRODUCTS DUE TO CAPILLARY FORCES
The Material Point Method (MPM) was implemented to predict the mechanical behavior of the cellular arrangement of biological tissues.The choice of this method was motivated by its ability to easily account for the actual and complex morphology of bio-products at the cellular level and to deal with large deformations.The vectorial image processing facilities provided by the custom software MeshPore allow such a procedure to be easily applied to microscopic images.In this work,the morphology of the cellular structure is observed using an Environmental Scanning Electron Microscope (ESEM).Our MPM model has been adapted to model the collapse of the cellular structure due to a negative water pressure inside the cell lumens.The simulations illustrate how the cellular morphology,resulting from the formation of radial lines of cells,induced a collapse mainly in the tangential direction of wood.The computed deformation in the tangential direction is roughly five fold the radial one.Finally,we discuss how the same modeling chain of tools,from image to computed results,could be applied to other bio-products,namely the cellular structure of fruits or vegetables.
drying eucalyptus spruce vascular system wood
P.Perré G.Almeida X.Frank
Ecole Centrale Paris,LGPM,Grande Voie des Vignes,92 290 Chatenay-Malabry,France AgroParisTech,UMR 1145 Ingénierie Procédés Aliments,1 avenue des Olympiades,91 300 Massy INRA,UMR 1208 IATE,2 place Pierre Viala,34 060 Montpellier,France
国际会议
The 18th International Drying Symposium Conference(第十八届国际干燥学术大会(IDS2012))
厦门
英文
1-5
2012-01-11（万方平台首次上网日期，不代表论文的发表时间）