Deep Penetration Into Frictional Ductile And Brittle Materials

Details

• Personal Author:
  Jeng, Fu Shu ; Einstein, Herbert H. ; Whittle, Andrew J. ; Germaine, John T.
• Corporate Authors:
  Massachusetts Institute of Technology. ; National Sea Grant Program (U.S.),
• NOAA Program & Office:
  Sea Grant ; OAR (Oceanic and Atmospheric Research)
• Sea Grant Program:
  MIT (MIT Sea Grant)
• Description:
  The mooring of offshore platforms and tension piles may involve deep penetration into rocks. This research was intended to study the phenomena and mechanisms of deep penetration, first through experimentation and then, based on the experimental results, by developing models for frictional, ductile/brittle materials. Penetration and pullout tests were performed under varying conditions including brittleness of the material, confining conditions, joint conditions (orientation and spacing), nose shape of penetrator and penetration velocity. By measuring the acceleration history in rapid penetration tests, the energy required to achieve a particular penetration depth was obtained. Through comparison with the results of slow penetration tests, it was also possible to assess the effect of penetration rate. In the modelling effort, the Strain Path Method (SPM) was used to analyze the deep penetration problem. The resultant model for a brittle material was validated by comparing the prediction to the experimental results.
• Keywords:
  Penetration mechanics
• Series:
  [Report]   MITSG 92-7
• Sea Grant Document Number:
  MIT-T-92-001
• Document Type:
  Technical Report
• Funding:
  Grant no. NA86AA-D-SG089
• Rights Information:
  Public Domain
• Compliance:
  Library
• Main Document Checksum:
  urn:sha256:e91ce1706723de1462564504ff5cda4750c5f3431bd4c2a5d668d079ed16b6bd
• Download URL:
  https://repository.library.noaa.gov/view/noaa/41772/noaa_41772_DS1.pdf
• File Type:
  [PDF - 7.97 MB ]