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Specimen size and geometry effects on fracture toughness of al2o3 measured with short rod and short bar chevron-notch specimens
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Munz, D. G. Shannon Jr., J. L. |
| Copyright Year | 1983 |
| Description | Plane strain fracture toughness measurements were made on Al2O3 using short rod and short bar chevron notch specimens previously calibrated by the authors for their dimensionless stress intensity factor coefficients. The measured toughness varied systematically with variations in specimen size, proportions, and chevron notch angle apparently due to their influence on the amount of crack extension to maximum load (the measurement point). The toughness variations are explained in terms of a suspected rising R curve for the material tested, along with a discussion of an unavoidable imprecision in the calculation of K sub Ic for materials with rising R curves when tested with chevron notch specimens. |
| File Size | 1371225 |
| Page Count | 14 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19830011631 |
| Archival Resource Key | ark:/13960/t8wb00v92 |
| Language | English |
| Publisher Date | 1983-01-01 |
| Access Restriction | Open |
| Subject Keyword | Nonmetallic Materials Geometry Stress Intensity Factors Rods Fracture Strength Aluminum Oxides Crack Propagation Bars Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
