Finite element analysis of unnotched charpy impact tests

Details

• Creators:
  Jeong, D. Y. ; Yu, Hailing ; Gordon, J E ; Tang, Y.H.
• Corporate Creators:
  John A. Volpe National Transportation Systems Center (U.S.)
• Subject/TRT Terms:
  • Finite element method
  • Fracture mechanics
  • Failure
  • Pendulum tests
  • Impact tests
  • Railroad safety
  • Tank cars
  • Railroad cars Charpy energy
  • Finite element analysis
  • Fracture
  More +
• Resource Type:
  Research Paper
• Geographical Coverage:
  United States
• Corporate Publisher:
  John A. Volpe National Transportation Systems Center (U.S.)
• 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.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/9900/dot_9900_DS1.pdf
• File Type:
  [PDF - 282.67 KB]
• Collection(s):
  Volpe Center
• Main Document Checksum:
  urn:sha-512:afada65e3d246865da4baa954a1088d297682609287c1f61325114fb00cf81942d9651776757501607aa485f14bcab526e48ad20d68fa5d3e225d486b6fe06bd