Mesh-gen-models

Mesh-Agent MLP Suite — Model Card

Model Summary

This work presents a suite of four lightweight Multilayer Perceptron (MLP) models designed to support intelligent mesh-refinement assistance in Finite Element Analysis (FEA). Each model targets a specific simulation preprocessing task:

Independent modeling avoids multi-loss interference and improves stability on the limited available dataset.

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Dataset Reference

All models were trained using the publicly available dataset:

MeshRefine-FEA Corner Bracket Dataset
Hugging Face: https://huggingface.co/datasets/Iris314/Mesh-gen-train

Dataset card includes simulation metadata, adaptive refinement history, convergence labels, and geometric descriptors.

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Architecture and Rationale

Graph Neural Networks (GNNs) were evaluated initially due to their alignment with geometric adjacency. However, the limited number of unique CAD parts led to severe overfitting and unstable training. Support Vector Machines were also considered but were rejected because they do not provide probabilistic outputs, which are required for confidence-aware threshold control. A unified multi-task MLP was tested but exhibited degraded performance due to conflicting optimization objectives.

Four independent MLPs were therefore selected for stronger performance-to-complexity trade-offs and for greater explainability, which is essential in engineering education contexts. To propagate local stress-driven insights into global decisions, feature-level models are trained first and their top-three predicted refinement regions are appended to the input of the part-level models. This ensures dimensionally consistent message passing while preserving local importance.

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Training Details

Low learning rate and extended training duration reduce overfitting under limited data conditions. A high-recall bias ensures that refinement-critical zones are always captured.

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Evaluation

Confidence scores are presented in the GUI to support user interpretation of predictions.

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Intended Use

Suitable for:

• Beginner FEA instruction and mesh setup feedback
• Early detection of non-convergent setups
• Estimating balanced local and global mesh sizing to reduce runtime

Not intended for certified structural verification in safety-critical systems.

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Limitations

• Dataset consists only of corner bracket geometries
• Assemblies and nonlinear load modes not represented
• Human verification of results remains required

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Ethical Considerations

This tool is designed for educational scaffolding and not for automated deployment in high-risk engineering design without expert review.

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Citation

Model citation

@model{mesh_agent_mlp_2025,
title={Mesh-Agent MLP Suite for Intelligent FEA Refinement},
author={X. Tang et al.},
year={2025},
note={Feature-aware mesh refinement prediction models for educational CAE assistance},
}