Estimation of Cement Composites Fracture Parameters Using Deformation Criterion

Area of Science:

• Materials Science
• Fracture Mechanics
• Solid Mechanics

Background:

• Dugdale's cohesive zone model is a key tool in fracture mechanics.
• Accurate determination of fracture parameters like K and CTODc is crucial for structural integrity.
• Existing methods for experimental determination can be complex.

Purpose of the Study:

• To present a simplified deformation criterion based on Dugdale's model.
• To enable straightforward experimental determination of K and CTODc.
• To facilitate the evaluation of load capacity in structural elements.

Main Methods:

• Development of a simple, explicit deformation criterion.
• Application of the criterion to U-shaped notched samples with arbitrary radii.
• Utilizing the relationship between maximal load and notch tip opening displacement.

Main Results:

• The criterion allows for direct calculation of K and CTODc from experimental data.
• A reverse procedure was derived to estimate maximum load from known K values.
• The method is applicable to various notch geometries.

Conclusions:

• The presented criterion offers a computationally efficient approach for fracture parameter determination.
• It simplifies the assessment of structural load capacity.
• The method is versatile for experimental analysis and engineering applications.