| Title | Growth Life of Surface Cracks in the Rail Web |
|---|---|
| Record ID | 50375 |
| Personal Name Creator |
Jeong, David Y. |
| Source | 54p. in various pagings |
| Corporate Creator | John A. Volpe National Transportation Systems Center (U.S.) |
| Corporate Contributor |
Lehigh University; United States. Department of Transportation. Federal Railroad Administration |
| Publisher | United States. Department of Transportation. Federal Railroad Administration |
| Publication Date | 19890101 |
| Language | English |
| Abstract | The results of a theoretical study of the propagation behavior of surface cracks in the web of railroad rails are presented. Two fracture mechanics models are presented: (1) a conventional LEFM model of an elliptical surface crack of constant aspect ratio growing through the web thickness; and (2) a generalized surface crack model based on Sih's strain energy diversity approach. The conventional model predicts that the crack will propagate only at extremely slow rates, even under conditions of tensile vertical residual stress created by roller straightening. The strain energy diversity model predicts a slow propagation principally along the web (i.e., the crack aspect ratio increases) without residual stress. |
| Rosap ID | dot:11763 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/11763 |
| TRT Terms | Cracking; Fracture mechanics; Mathematical models; Railroad rails |
| General Subjects | Crack propagation; Rail web; Surface cracks |
| Classification | AGR - INFRASTRUCTURE - Railroads; NTL - RAIL TRANSPORTATION - RAIL TRANSPORTATION; NTL - RAIL TRANSPORTATION - Rail Safety; NTL - SAFETY AND SECURITY - Vehicle Design; NTL - SAFETY AND SECURITY - Rail Safety; NTL - SAFETY AND SECURITY - SAFETY AND SECURITY |
| Geographical Coverage |
United States |
| Contract Number | DTRS-57-85-C-00093 |
| Report Number | DOT/FRA/ORD-89/; DOT-TSC-FRA-89-01 |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/50000/50300/50375/DOT-TSC-FRA-89-01.pdf |
| Format | |
| Database | NTL Digital Repository |