김경종
74 lines
3.0 KiB
Markdown
74 lines
3.0 KiB
Markdown
---
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type: concept
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title: "Abaqus Contact Formulations and Enforcement"
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complexity: advanced
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domain: computational-mechanics
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created: 2026-06-01
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updated: 2026-06-01
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address: c-000125
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aliases:
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- Abaqus contact enforcement
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- Abaqus contact formulations
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- Abaqus penalty contact
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tags:
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- concept
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- finite-element-method
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- abaqus
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- contact
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- nonlinear-analysis
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- constraints
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status: current
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related:
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- "[[Abaqus-Analysis-User-s-Guide-Volume-V|Abaqus Analysis User's Guide Volume V]]"
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- "[[Abaqus Contact Interaction Definition]]"
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- "[[Abaqus Contact Property Models]]"
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- "[[Abaqus Contact Diagnostics and Modeling Difficulties]]"
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- "[[Finite Element Contact Formulation]]"
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- "[[Abaqus Nonlinear Solution Control]]"
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sources:
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- "[[Abaqus-Analysis-User-s-Guide-Volume-V|Abaqus Analysis User's Guide Volume V]]"
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source_refs:
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- source: "[[Abaqus-Analysis-User-s-Guide-Volume-V|Abaqus Analysis User's Guide Volume V]]"
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raw_path: ".raw/AbaqusAnalysisUserGuide5/"
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raw_files:
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- "AbaqusAnalysisUserGuide5_075.md"
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- "AbaqusAnalysisUserGuide5_004.md"
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- "AbaqusAnalysisUserGuide5_086.md"
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- "AbaqusAnalysisUserGuide5_042.md"
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md_indices:
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- 75
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- 4
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- 86
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- 42
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match: "heuristic-heading-keyword"
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confidence: high
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---
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# Abaqus Contact Formulations and Enforcement
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## Definition
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Abaqus contact formulations and enforcement methods determine how contact kinematics are discretized and how nonpenetration and interface laws are imposed numerically.
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## How They Work
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Contact formulations include node-to-surface, surface-to-surface, edge-to-surface, edge-to-edge, vertex-to-surface, small-sliding, and finite-sliding tracking. The formulation affects contact normals, opening distance, shell thickness treatment, master/slave assignment, and behavior near corners or symmetry planes.
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Constraint enforcement methods include direct Lagrange multiplier enforcement, penalty enforcement, and augmented Lagrange enforcement depending on product, contact definition, and interaction behavior. Penalty methods allow controlled penetration; direct methods enforce constraints more strictly but can interact strongly with other constraints.
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## Why It Matters
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Two models with the same surfaces and friction law can differ if the contact formulation or enforcement method changes. These choices affect robustness, smoothness, contact pressure oscillation, overconstraint sensitivity, and computational cost.
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## Connections
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- [[Abaqus Contact Interaction Definition]] chooses general contact or contact pairs before formulation details are applied.
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- [[Abaqus Contact Property Models]] supplies the interface law being enforced.
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- [[Abaqus Contact Diagnostics and Modeling Difficulties]] describes symptoms of poor formulation or enforcement choices.
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- [[Abaqus Nonlinear Solution Control]] is affected by contact enforcement, stabilization, and cutbacks.
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## Sources
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- [[Abaqus-Analysis-User-s-Guide-Volume-V|Abaqus Analysis User's Guide Volume V]]
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