Molds & Tooling
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PETG product fatigue fracture
Fenómeno del problema
Fatigue cracks appear under repeated bending or vibration loads and propagate to fracture.
Análisis de la causa
Stress concentration points initiate fatigue cracks, internal stress in the product accelerates fatigue, and the material fatigue strength is insufficient.
Solución
Improve the design to reduce stress concentration; increase mold temperature to reduce internal stress; toughening modification if necessary.
Conclusión clave
PETG fatigue performance is closely related to internal stress and design.
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