Anto01
723b71e60b
THREE critical fixes applied: 1. API Access Pattern - Support dotted attribute names (e.g., 'stress.chexa_stress') - Compatible with newer pyNastran versions (NX 2412.5) - Fallback to older API formats for compatibility 2. Correct Von Mises Index - Solid elements (CHEXA, CTETRA, CPENTA): index 9 - Shell elements (CQUAD4, CTRIA3): last column - Data structure: [oxx, oyy, ozz, txy, tyz, txz, o1, o2, o3, von_mises] 3. Units Conversion (CRITICAL) - NX Nastran outputs stress in kPa, not MPa - Apply conversion: kPa / 1000 = MPa - Example: 113094.73 kPa -> 113.09 MPa Test Results: - Before: 0.00 MPa (FAIL) - After: 113.09 MPa at element 83 (SUCCESS) Files modified: - optimization_engine/result_extractors/op2_extractor_example.py Test files added: - examples/test_stress_direct.py - examples/test_stress_fix.py - examples/debug_op2_stress.py - STRESS_EXTRACTION_FIXED.md - TESTING_STRESS_FIX.md
57 lines
1.5 KiB
Python
57 lines
1.5 KiB
Python
"""
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Direct test of stress extraction without using cached imports.
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"""
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from pathlib import Path
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import sys
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# Force reload
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project_root = Path(__file__).parent.parent
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sys.path.insert(0, str(project_root))
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# Import directly from the file
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import importlib.util
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spec = importlib.util.spec_from_file_location(
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"op2_extractor",
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project_root / "optimization_engine/result_extractors/op2_extractor_example.py"
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)
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op2_extractor = importlib.util.module_from_spec(spec)
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spec.loader.exec_module(op2_extractor)
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if __name__ == "__main__":
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op2_path = project_root / "examples/bracket/bracket_sim1-solution_1.op2"
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print("="*60)
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print("DIRECT STRESS EXTRACTION TEST")
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print("="*60)
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print(f"OP2 file: {op2_path}")
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print()
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# Test stress extraction
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print("--- Testing extract_max_stress() ---")
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try:
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result = op2_extractor.extract_max_stress(op2_path, stress_type='von_mises')
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print()
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print("RESULT:")
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for key, value in result.items():
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print(f" {key}: {value}")
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if result['max_stress'] > 100.0:
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print()
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print("SUCCESS! Stress extraction working!")
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print(f"Got: {result['max_stress']:.2f} MPa")
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elif result['max_stress'] == 0.0:
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print()
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print("FAIL: Still returning 0.0")
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else:
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print()
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print(f"Got unexpected value: {result['max_stress']:.2f} MPa")
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except Exception as e:
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print(f"ERROR: {e}")
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import traceback
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traceback.print_exc()
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print()
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print("="*60)
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