Crack Path Analysis Technical Brief
Abstract: The objective of this work revolves around a need for an accurate numerical simulation method that computes the stress intensity factors (SIF) along a predicted crack propagation path for planar two dimensional bodies. In response to this need, ESRD has developed an automated procedure in StressCheck®, a p-version finite element analysis (FEA) tool, that computes through-crack stress intensity factors for mode I and mode II along a predicted crack propagation path. This functionality is applicable to planar analysis (2D plate with in-plane loading). The trajectory of the crack is determined by a relationship between mode I and mode II SIF’s (K1 and K2) and is shown to be very accurate.
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“Small errors in modeling can lead to substantial errors in joint performance prediction. To alleviate this problem, the CAI used the handbook functionality of ESRD Inc.’s (St. Louis, Mo.) trademarked StressCheck® P-version finite element software to develop reusable models of typical joints.”
Dr. John RussellComposites World Magazine