Evaluation of semi-empirical analyses for railroad tank car puncture velocity, part 2 : correlations with engineering analysis

Details

• Creators:
  Jeong, D. Y. ; Tang, Y. H. ; Perlman, A. B.
• Corporate Creators:
  John A. Volpe National Transportation Systems Center (U.S.)
• Subject/TRT Terms:
  • Impact strength
  • Impact tests
  • Mathematical models
  • Methodology
  • Piercing
  • Puncture resistance
  • Railroad cars
  • Tank cars
  • Velocity
• Publication/ Report Number:
  DOT-VNTSC-FRA-99-10 ; DOT/FRA/ORD-01/21.II
• Resource Type:
  Research Paper
• Geographical Coverage:
  United States
• Edition:
  Final Report ¿August 1998
• Corporate Publisher:
  United States. Federal Railroad Administration. Office of Research and Development
• Abstract:
  This report is the second in a series focusing on methods to determine the puncture velocity of railroad tank car shells. In this ; context, puncture velocity refers to the impact velocity at which a coupler will completely pierce the shell and puncture the tank. ; In the first report in this series, a set of semi-empirical equations was evaluated by comparing calculated puncture velocities with data ; from tank car impact tests. These equations were originally developed by the RPI-AAR Tank Car Safety Committee and later ; modified by the industry to account for head shield protection and jacket insulation. The semi-empirical equations generally ; produced reasonable and conservative estimates of puncture velocity when compared with the experimental data. However, ; differences between the calculated and observed results become more widespread when the tank is pressurized or when shield ; protection is present. Moreover, alternative methods to determine puncture velocity may be observed by the industry to avoid overdesign. ; In this report, methods to predict puncture velocity based only on engineering mechanics principles (i.e., no empiricism) are ; developed and described. Results from the semi-empirical approach are compared with results from the engineering methods. These ; methods rely on both analytical and computational tools to examine the structural behavior of tanks with ellipsoidal shapes. These ; tools include finite element and dynamic lumped mass models.
  More +
• Format:
  PDF
• Funding:
  R-9002/RR-928
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/5248/dot_5248_DS1.pdf
• File Type:
  [PDF - 718.22 KB]
• Collection(s):
  Volpe Center ; Federal Railroad Administration
• Main Document Checksum:
  urn:sha-512:2e8bf2cde263e7e36d588a33afae2dc5378ae4454ef0321755406b100a2eb4f8b9c5728f8e5b876a01d5a04408471d18eca07863ce292b6b324073275dcbc905