TIME-CONTINUOUS COHESIVE INTERFACE FINITE ELEMENTS IN EXPLICIT DYNAMICS1

Abstract eng:
We identify two pathologies with initially rigid traction-displacement cohesive relationship used in explicit dynamics in the previous literature, namely, division by zero and nonconvergence in time. These problems arise at least partly from the attempt to extend uniaxial traction-displacement relationships to multiaxial loading. We also argue that any attempt to fix these pathologies in a functional traction-displacement setting leads to two new pathologies, namely, encoding and traction locking. We exhibit an example of a law that fixes division by zero and time discontinuity but still suffers from encoding and traction locking.

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