Low-Fidelity Simulation Tool for Composite Laminate Damage
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Solution Overview
Problem
Existing high-fidelity numerical models for simulating damage in composite laminates are cost-inhibitive due to high user expertise and computational resource requirements, making them unsuitable for practical applications outside research environments, and are prone to errors when dealing with complex damage processes.
Innovation Solution
A low-fidelity numerical simulation tool using the Floating Node Method, Virtual Crack Closure Technique, and finite element analysis to simulate three-dimensional internal crack networks in composite laminates, with a focus on computationally efficient shell/plate elements that adaptively increase fidelity only where needed, allowing for rapid and accurate damage simulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-fidelity numerical models are used to simulate damage in composite laminates, then accuracy of damage simulation is improved, but user expertise requirements and computational resource requirements increase
Solution Approach 1:
The patent segments the complex three-dimensional damage simulation into a series of two-dimensional progressive damage analyses. By dividing the thickness direction into multiple layers and analyzing damage progression layer by layer, the method reduces computational complexity while maintaining accuracy in predicting delamination and matrix cracking patterns.
Solution Approach 2:
The patent applies local quality by using refined mesh only in critical regions where damage is expected to occur, while using coarser mesh in other areas. This selective refinement approach maintains high accuracy in damage prediction zones while reducing overall computational resource requirements and model complexity.
2Measurement precision
If high-fidelity numerical models are used to simulate damage in composite laminates, then accuracy of damage simulation is improved, but computational resources required increase
Solution Approach 1:
The patent segments the complex three-dimensional damage simulation into a series of two-dimensional progressive damage analyses. By dividing the thickness direction into multiple layers and analyzing damage progression layer by layer, the method reduces computational complexity while maintaining accuracy in predicting delamination and matrix cracking patterns.
Solution Approach 2:
The patent applies partial action by performing damage analysis incrementally through loading steps rather than analyzing the entire damage process at once. This progressive approach computes damage state at each increment based on previous states, reducing memory requirements and computational effort compared to a full three-dimensional simultaneous analysis.
3Measurement precision
If model fidelity is increased to accurately capture damage processes, then simulation accuracy is improved, but model development time increases
Solution Approach 1:
The patent applies preliminary action by pre-defining material properties, damage criteria, and constitutive models before the actual damage analysis. By preparing material databases, failure criteria thresholds, and progressive damage parameters in advance, the model reduces setup time and allows for faster model development and reuse across different laminate configurations.
Data Source
AI summary
A numerical simulation tool for progressive failure in laminates utilizes a low fidelity approach. The numerical model includes an enriched element that is initially in a low fidelity form. The enriched elements may increase fidelity by splitting locally to simulate an ongoing damage process such as delamination.