Pertlnence d'une llgne de rupture predefinie pour modeliser les interactions sol-outilavec la methode des elements finis
Authors: C. Plouffe, S. Tessier, C. Lague et M.!. Richard
Description: Simulations were performed in two dimensions (2-D) to study the relevance of using a predetermined soil rupture line to model soil-tool interactions with the Finite Element Method (FEM). Five rupture criteria were compared: conventional (no rupture line), friction, stresses at the crack tip, crack spacing, and crack distance-time. The soil deviatoric stress and displacement revealed that stresses and friction criteria were not adequate with the cohesionless Cam clay model used because of the discontinuity between the top and sub soils. The three other criteria had similar rupture zones, stress contours, and tool forces. Elements at the tool tip were less distorted when a rupture line was included to help model continuous tool displacement. Even though, the rupture zone at the tool tip is not necessarily uniform and horizontal. However, the conventional meshing is much simpler to generate, requires 25 to 50% less computation time, is also applicable in 3-D with the commercial FEM package ABAQUS, and the results are similar for small tool displacement in the soil.
Citation: C. Plouffe, S. Tessier, C. Lague et M.!. Richard 1999. PERTlNENCE D'UNE LlGNE DE RUPTURE PREDEFINIE POUR MODELISER
LES INTERACTIONS SOL-OUTILAVEC LA METHODE DES ELEMENTS FINIS. Canadian Agricultural Engineering 41(3):153-159.
Publisher: Canadian Society for Bioengineering
Language 1: en
Rights: Canadian Society for Bioengineering