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---
title: LLM Explanation
emoji: 馃摎
colorFrom: purple
colorTo: gray
sdk: gradio
sdk_version: 5.47.2
app_file: app.py
pinned: false
---
# Simply Supported Beam Calculator (with Natural Language Explanation)
This Gradio app demonstrates a **deterministic first-principles calculator** for a simply supported beam with a **centered point load**.
## Features
- Deterministic backend formulas:
- Maximum bending moment: M = P路L / 4
- Maximum stress: 蟽 = M路c / I
- Midspan deflection: 未 = P路L鲁 / (48路E路I)
- **Input validation** with clear ranges and units.
- **Structured JSON record** showing all assumptions, inputs, formulas, and results.
- **Natural language explanation**: results are contextualized by an LLM pipeline (Flan-T5) or fallback template.
- User-facing Gradio interface with:
- Numerical results table
- Explanation panel
- JSON record panel
## Inputs
- L (m): span length
- P (kN): center point load
- E (GPa): elastic modulus
- I (cm^4): second moment of area
- c (cm): extreme fiber distance
- Optional: allowable stress (蟽_allow), yield strength (fy), safety factor (n)
## Outputs
- Numerical results: bending moment, stress, deflection, utilization, pass/fail
- Explanation text
- Structured JSON (for reproducibility and transparency)
## Limitations
- Only valid for simply supported beams with a single center load.
- Small deflection theory, linear elastic, prismatic section.
- Users must provide correct I and c (from section properties).
---
### How to run locally
```bash
pip install -r requirements.txt
python app.py
Check out the configuration reference at https://huggingface.co/docs/hub/spaces-config-reference
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