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ELFORM=52 for 2D plain strain, where BASELM has to be set to 13.
=54 for 3D shell, where BASELM can be set to eith 2 or 16.
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Card 3
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MCID: material ID defined in *MAT_COHESIVE_TH [2]. If not defined, there is no cohesive fracture processing zone. It is recommended to define MCID for brittle material.
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BASELM: base element formulation (see ELFORM)
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DOMINT=0 for phantom element integration (recommended) [3]
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FAILCR: criterion for initializing and advancing crack
=1: maximum tensile strength. The value is defined in *MAT_COHESIVE_TH with MCID.
​ This is typically for brittle material.
​ =-1: critical effective plastic strain (EPS). The value is defined in FS. If LS>0, the crack
advances only when the regularized EPS at the crack tip is greater than FS. [4]
This is typically for ductile material.
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PROPCR: option to determine crack propagation direction
=0: maximum principal direction of total strain. Recommended to use FAILCR=1.
=2: center of EPS. Recommended to use FAILCR=-1. [5]
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FS: critical value for FAILCR=-1.
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LS>0 turns on regularization for FAILCR=-1. It defines the radius of a circular regularization zone (material length scale) in a 2D locally projected domain at crack tip. [4]
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NC>0 defines number of cracks allowed. NC<0 activates element erosion for cracked XFEM elements.
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ELFORM=41 is more suitable for crashworthiness analysis
=42 is more suitable for sheet metal forming analysis
​
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*SECTION_SOLID_EFG [7] [ex​]
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Section definition for EFG solid element formulation
​
Card 1
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ELFORM=42 is for tetrahedron background mesh. It is recommended to use this formulation in 3D TET-based adaptive EFG.
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Card 2 and 3
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IEBT=3 and IDIM=2 are the recommended setting with the best computational efficiency. In case of ELFORM=41 with HEX/PENT mesh, IDIM=-1 has the best efficiency. [8]
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IPS=1 turns on the pressure smoothing. [9]
*SECTION_SOLID_PERI [10] [ex​]
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Section definition for Peridynamics solid element formulation
​
Card 1
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ELFORM=48 defines Peridynamic solid formulation
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For 3D solid, it automatically detects and supports tetrahedron (TET), hexahedron (HEX) and pentahedron (PENT)​. (see related keywords) [ex]
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For thin layers in laminate, it automatically detects and supports 3-node triangular and 4-node quadrilateral elements. (see related keywords​) [ex]
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ELFORM=47 defines SPG solid formulation. It accepts FEM solid mesh as input, and automatically converts the FEM nodes to SPG particles.
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Card 2​
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DX, DY & DZ: define the normalized support sizes in x-, y-, z-directions. [11] Default values are recommended.
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KERNEL: defines the type of kernel approximation. [12]
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SMSTEP: defines the interval of time steps to perform kernel update. [13] Default value is recommended.
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Card 3
