in its original state (configuration k 0) the block is rectangular and covered by a square grid,
in its current state (configuration k t ), application of the die has forced material down to the base and into the upper part as required for the forming process, and the grid has been deformed.
KeywordsConvective transport Transformation Gradient of a transformation Homogeneous tangent map Rigid body transformation Isometry Expansion Stretch Strain Displacement Geometrical compatibility Infinitesimal transformation
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