| Title | Finite element analysis of unnotched charpy impact tests |
|---|---|
| Record ID | 47511 |
| Personal Name Creator |
Jeong, D. Y.; Yu, Hailing; Gordon, J E; Tang, Y.H. |
| Source | 12p. in various pagings |
| Corporate Creator | John A. Volpe National Transportation Systems Center (U.S.) |
| Publisher | John A. Volpe National Transportation Systems Center (U.S.) |
| Publication Date | 20081000 |
| Language | English |
| Abstract | This paper describes nonlinear finite element analysis (FEA) to examine the energy to fracture unnotched Charpy specimens under pendulum impact loading. An oversized, nonstandard pendulum impactor, called the Bulk Fracture Charpy Machine (BFCM), was constructed to conduct studies to assess the fracture behavior of various tank car steels. Comparisons between measured and calculated impact energies are presented. The effect of various factors on impact energy is demonstrated through the test data and FEA results. These factors include striker size and shape, specimen thickness, and specimen material. Moreover, calculations of fracture energy are carried out using FEA in conjunction with different material failure criteria. The FEA results using a failure initiation criterion based on the general state of stress in terms of stress triaxiality and a failure progression model based on linear strain softening are shown to provide excellent agreement with the experimental data. |
| Rosap ID | dot:9900 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/9900 |
| TRT Terms | Finite element method; Fracture mechanics; Failure; Pendulum tests; Impact tests; Railroad safety; Tank cars; Railroad cars |
| General Subjects | Charpy energy; Finite element analysis; Fracture; Material failure; Stress triaxiality |
| Classification | NTL - RAIL TRANSPORTATION - Rail Safety; NTL - SAFETY AND SECURITY - Vehicle Design; NTL - SAFETY AND SECURITY - Rail Safety |
| Geographical Coverage |
United States |
| Availability | Volpe National Transportation Systems Center, Technical Reference Center |
| Resource type | Research Paper |
| URL | https://ntlrepository.blob.core.windows.net/lib/47000/47500/47511/Jeong_finite_element.pdf |
| Format | |
| Database | NTL Digital Repository |