| METADEX Antwortnummer 16 - © 1998 CSA |
| Title |
| | Strength Evaluation and Safety of Machine/Structure. III. Case Examples on Strength and Safety Evaluation of Machine/Structure: Rollingstock-Axle, Fabricated Truckframe. |
| Author |
| | Iwamura, A. (Kawasaki Heavy Industries); Koe, S. (Kawasaki Heavy Industries); Toyama, K. (Sumitomo Metal Industries) |
| Publication Source |
| | Journal of the Society of Materials Science, Japan (June 1992) 41, (465), 957-962, Graphs, 20 ref.
ISSN: 0514-5163 |
| Document Type |
| | Journal |
| Country of Publication |
| | Japan |
| Language |
| | Japanese |
| Abstract |
| | Japan's railroad cars are designed for long term use (20-30 years). High speed train axles and their safety evaluation are discussed. The bullet train axles turn over rate was 1 at the start of its operation in 1965 and 0.5 in 1985 (main reason: fretting fatigue by magnetic powder scarring). Under the new JIS regulations, the axles are designed to stand speed of 280 km/h, and are made by continuous casting (in-heat casting of steel, then NC lathe process after treatment). Allowance for wheel rest fatigue ORE regulation is 100 MPa at pulling force 550-650 MPa, BC regulation, 72.5 MPa at 529-606 MPa, 83.3 MPa at 606-681 MPa. Inspections are conducted by operators (visual) and by inspectors (audio, visual, measurement, and nondestructive testing). For bullet trains, magnetic powder scarring is inspected after 108 runs and for TGV trains, overhaul at an average of 1 370 000 km. Coach frames are manufactured after completion of various tests on mock up models. Stress tests and static weight tests are based on JIS E 4207 endurance limit. One-side open welding is used as the basic method for main parts' construction. Records of stress of actual operation are compiled with past (30 years') records on fatigue/damage and compared with S-N evaluation line. |
| Accession Number |
| | 93(12):61-1550 |
