stress_strain_presenxdfsdftation (1).pptx

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1. Understanding the Stress-Strain Curve and Mechanical Properties Metals, Ceramics, and Polymers Presented by: [Your Name]

2. Introduction to Stress and Strain • Stress: Force per unit area (σ = F/A) • Strain: Relative deformation (ε = ΔL/L₀)

3. Types of Stress and Strain • Tensile, Compressive, Shear stress • Elastic (recoverable) and Plastic (permanent) strain

4. Stress-Strain Curve Overview • Elastic Region • Yield Point • Plastic Region • Ultimate Strength • Fracture Point

5. Mechanical Concepts • Elastic Modulus (Young's Modulus) • Yield Strength • Ductility • Resilience and Toughness

6. Mechanical Testing Methods • Tensile Test • Compression Test • Flexural Test • Shear Test

7. Mechanical Properties of Metals • High stiffness and strength • Good ductility • High toughness

8. Mechanical Properties of Ceramics • High stiffness and strength • Brittle nature • Low toughness

9. Mechanical Properties of Polymers • Low stiffness • High ductility and flexibility • Moderate toughness

10. Comparative Overview Comparison of mechanical properties: • Metals • Ceramics • Polymers

11. Applications in Dentistry • Metals: Implants, orthodontics • Ceramics: Crowns, veneers • Polymers: Dentures, composites

12. Real-Life Considerations • Fatigue, creep, environmental impact • Clinical implications

13. Conclusion & Key Takeaways • Importance of stress-strain analysis • Material selection considerations

14. Advanced Mechanical Phenomena • Fatigue: cyclic load failure • Creep: Long-term deformation • Stress relaxation: Reduced stress under constant strain

15. Clinical Case Studies • Ceramic fracture (brittleness) • Polymer deformation (creep)

16. References • Phillips' Science of Dental Materials • Online academic resources

17. Q&A Thank you for your attention! Questions?