Three-Dimensional Effects on the Dynamic Fracture Determination of Al 7075-T651 Using TPB Specimens Articles uri icon

publication date

  • April 2008

start page

  • 2203

end page

  • 2219

issue

  • 7-8

volume

  • 45

international standard serial number (ISSN)

  • 0020-7683

electronic international standard serial number (EISSN)

  • 1879-2146

abstract

  • Here we present a numerical analysis of three-dimensional effects on the dynamic three-point-bending fracture tests on Al 7075-T651 alloy specimens performed in a modified Split Hopkinson Pressure Bar. Using the Finite Element Method implemented in a commercial code the whole experimental device has been modeled. Different thicknesses and initial crack-to-width ratio specimens are simulated at different impact velocities to study the possible effect on the Crack Mouth Opening Displacement and, using a local stress fracture criterion, in the critical Stress Intensity Factor. The numerical results are compared with experimental results found by the authors.