| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Engineering Ceramics: Microstructure-Property-Performance Relations and Applications
|
| Presentation Title |
Comparison of Alternate Methods of Fracture Toughness Determination via Strength Analysis |
| Author(s) |
Nhu Dinh, John J. Mecholsky |
| On-Site Speaker (Planned) |
John J. Mecholsky |
| Abstract Scope |
Various techniques have been suggested to calculate fracture toughness since George Irwin introduced the concept of stress intensity. The finite element analysis of Raju and Newman (R-N), the modified R-N model suggested by Strobl et al., the area method of Bansal, and the Quantitative Fractographic method are compared to the original Irwin solution by calculation of the strength values for a material with an assumed ideal semielliptical crack with depth to half-width ratios varying from 0.1 to 1 for a given crack size (100 microns) with a given fracture toughness (0.75 MPa m1/2). For semi-elliptical cracks with a/c ≥ 0.6, any of the techniques can be used to calculate the fracture toughness of materials with an accuracy within 8%. The differences for a/c ≤ 0.6 depend on the approach and are compared to Irwin’s solution. |