Dynamic breakage and fragmentation of brittle single particle of various sizes and strength

Kam Tim Chau, S.Z. Wu, R.H.C. Wong, W.C. Zhu, C.A. Tang, T.X. Yu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

Breakage,comminutioa,crushing and fragmentation of brittle solids under dynamic impacts are an important applied mechanics and rock mechanics problem.In civil engineering applications,impact-induced-fragmentation relates to crushing of rock mass during mining process,tunneling,and aggregate production.The main objective of this paper is to outline some of our recent experimental,analytical and numerical efforts in studying the dynamic fragmentation process in brittle particle.First,an analytical solution of a solid sphere compressod dynamically between two rigid flat platens is derived analytically.Secondly,a sequence of double impact tests on spheres were conducted using an impactor Dynatup 8250 at HKUST,with both impact velocity and contact force at the impactor measured accurately.Finally,a newly developed computer program,DIFAR,is used to investigate the mechanism of dynamic fragmentation.The paper will summarize and discuss briefly all three aspects of our comprehensive approach.
Original languageEnglish
Pages (from-to)2138-2144
Number of pages7
Journal岩石力学与工程学报 (Chinese journal of rock mechanics and engineering)
Volume22
Publication statusPublished - 2003

Keywords

  • Damage mechanics
  • Fragmentation
  • Dynamic impact
  • Brittle particles

ASJC Scopus subject areas

  • Geology
  • Geotechnical Engineering and Engineering Geology
  • Civil and Structural Engineering

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