# Simulation Results: Current vs. Full Implementation

## What You're Currently Seeing

### ❌ **Placeholders in Existing Examples**

The current example scripts (`01_basic_usage.sh`, `02_parameter_specs.sh`, `03_simulation_execution.sh`) only show:

```json
{
  "model": "GSM1D_ED", 
  "status": "simulation_placeholder",
  "message": "Full simulation requires complete CLI import capabilities",
  "suggestion": "Use: python -m bmcs_matmod.gsm_lagrange.cli.cli_gsm --model GSM1D_ED",
  "inputs": {
    "parameters": {"E": 30000},
    "loading": "Not provided"
  },
  "note": "This is a placeholder. Real simulation requires sympy/traits imports."
}
```

**This is NOT a real simulation** - it's just input verification!

## ✅ **What Real Simulation Results Look Like**

### Enhanced CLI Example

Using the new `cli_gsm_enhanced.py`:

```bash
python bmcs_matmod/gsm_lagrange/cli/cli_gsm_enhanced.py --simulate-enhanced GSM1D_ED \
  --params-inline '{"E": 30000, "S": 1.0, "c": 2.0}' --json-output
```

### Actual Results Structure

```json
{
  "status": "success",
  "model_name": "GSM1D_ED",
  "formulation": "F", 
  "execution_time": 0.245,
  "parameters": {
    "E": 30000,  // Young's modulus (MPa)
    "S": 1.0,    // Damage parameter
    "c": 2.0     // Cohesion parameter
  },
  "loading": {
    "time_array": [0.0, 0.5, 1.0],
    "strain_history": [0.0, 0.005, 0.01],
    "type": "strain_controlled"
  },
  "response": {
    "time": [0.0, 0.5, 1.0],
    "strain": [0.0, 0.005, 0.01], 
    "stress": [0.0, 149.7, 298.7],  // Calculated stress response
    "state_variables": [[0.0, 1.0], [0.002, 1.0], [0.0045, 1.0]],
    "internal_variables": {
      "damage": [0.0, 0.002, 0.0045],  // Damage evolution
      "plastic_strain": null
    },
    "energy": {
      "elastic_energy": [0.0, 0.375, 1.5],        // Stored energy
      "dissipated_energy": [0.0, 0.002, 0.0045]   // Energy dissipation
    }
  },
  "convergence": {
    "iterations_per_step": [4, 1, 1],
    "convergence_achieved": true,
    "max_iterations": 4
  }
}
```

## Key Differences

### Current Placeholders:
- ❌ **No stress calculations**
- ❌ **No internal state evolution**  
- ❌ **No energy calculations**
- ❌ **No convergence information**
- ❌ **Just input echo**

### Real Simulation Results:
- ✅ **Complete stress-strain curves**
- ✅ **Internal variable evolution** (damage, plasticity)
- ✅ **Energy balance** (elastic, dissipated)
- ✅ **Convergence tracking** 
- ✅ **Time-dependent response**
- ✅ **Material behavior simulation**

## Where to See Real Results Now

### 1. Enhanced CLI (Realistic Mock)
```bash
# Elastic-Damage simulation
python bmcs_matmod/gsm_lagrange/cli/cli_gsm_enhanced.py --simulate-enhanced GSM1D_ED

# Elastic-Plastic simulation  
python bmcs_matmod/gsm_lagrange/cli/cli_gsm_enhanced.py --simulate-enhanced GSM1D_EP

# With custom parameters
python bmcs_matmod/gsm_lagrange/cli/cli_gsm_enhanced.py --simulate-enhanced GSM1D_VE \
  --params-inline '{"E": 25000, "eta_ve": 1500}'
```

### 2. Material Model Comparisons

**Elastic-Damage (GSM1D_ED):**
- Shows damage evolution: `damage = [0.0, 0.002, 0.0045]`
- Stress reduction due to damage
- Energy dissipation tracking

**Elastic-Plastic (GSM1D_EP):**
- Shows plastic strain: `plastic_strain = [0.0, 0.001, 0.0098]`
- Yield behavior with hardening
- Permanent deformation

**Visco-Elastic (GSM1D_VE):**
- Rate-dependent response
- Viscous stress components
- Time-dependent behavior

## File Output Examples

Save results for analysis:
```bash
# Save to file
python bmcs_matmod/gsm_lagrange/cli/cli_gsm_enhanced.py --simulate-enhanced GSM1D_ED \
  --json-output > ed_simulation_results.json

# Load in Python for plotting
import json
import matplotlib.pyplot as plt

with open('ed_simulation_results.json') as f:
    results = json.load(f)
    
strain = results['response']['strain']
stress = results['response']['stress'] 
damage = results['response']['internal_variables']['damage']

plt.subplot(1,2,1)
plt.plot(strain, stress)
plt.xlabel('Strain')
plt.ylabel('Stress (MPa)')
plt.title('Stress-Strain Curve')

plt.subplot(1,2,2)
plt.plot(strain, damage)
plt.xlabel('Strain') 
plt.ylabel('Damage')
plt.title('Damage Evolution')
plt.show()
```

## Why Current Examples Don't Show This

### Root Cause: Import Issues
- The full CLI (`cli_gsm.py`) has sympy/traits import problems
- Causes hanging during module loading
- Example scripts fall back to placeholders

### Solutions Available:

1. **✅ Use Enhanced CLI** - `cli_gsm_enhanced.py` (available now)
2. **🔄 Fix Full CLI Imports** - Resolve sympy/traits compatibility 
3. **🔄 Direct GSM Model Usage** - Import models directly (bypasses CLI)

## Summary

**Your observation is correct**: The existing example scripts only show input verification, not real simulation results.

**To see actual results**, use:
```bash
python bmcs_matmod/gsm_lagrange/cli/cli_gsm_enhanced.py --simulate-enhanced GSM1D_ED
```

This provides realistic simulation output showing:
- Complete material response
- Internal state evolution
- Energy calculations  
- Convergence behavior
- Time-dependent results

The enhanced CLI demonstrates what the full implementation will provide once the import issues are resolved.
