Concept reference

CalculiX

Input-deck FEA for linear and nonlinear structural, thermal, and thermomechanical cases.

1 min read

Coverage

Linear and nonlinear structural mechanics, thermal and thermomechanical analyses, contact, and modal extraction. Material cards generate from typed constitutive choices in the CaseSpec.

The .inp deck

The adapter writes a CalculiX-format input deck with *HEADING, *NODE, *ELEMENT, *MATERIAL, *BOUNDARY, *STEP, *STATIC/*DYNAMIC, and *OUTPUT blocks. Mesh *INCLUDE indirection keeps the deck small and the mesh independently re-materializable.

Loads, constraints, contact

Loads, displacement constraints, MPCs, and contact pairs are typed in the CaseSpec and projected into deck cards. Named selections become NSET and ELSET entities so a CAD-update mesh-regeneration doesn't break BCs.

QoIs you can extract

Stress (von Mises, principal), strain, displacement, reaction force, contact pressure, and modal frequencies are all typed QoIs with units, scope (region/node/element), and tolerance. The CalculiX *OUTPUT, FREQUENCY block is generated to record exactly what's needed — no more, no less.

NAFEMS-style review

Standards packs (e.g., ASME BPV VIII-2 Linear Elastic Review Pack) add mandatory extracts, signature blocks, and algorithm references that the report builder enforces before publication.

Related solver guides

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