The IUTAM Symposium on Macro- and Micro-Mechanics of High Velocity Deformation and Fracture (MMMHVDF) (August 12 - 15, 1985) was held at Science Council of Japan, under the sponsor ship of IUTAM, Science Council of Japan, Japan Society for the Promotion of Science, The Commemorative Association for the Japan World Exposition (1970), and The Japan Society for Aeronautical and Space Sciences. The proposal of the symposium was accepted by the General Assembly of IUTAM, and the scientists mentioned below were appointed by the Bureau of IUTAM to serve as member of the Scientific Committee. The main object of the Symposium was to make a general survey of recent developments in the re search of high velocity solid mechanics and to explore further new ideas for dealing with unsettled problems, of fundamental nature as well as of practical importance. The subjects covered theoretical, experimental, and numerical fields in macro- and micro-mechanics associated with high velocity de formatio~ and fracture in soldis, covering metals, ceramics, polymers, and composites.

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Opening Session (Presiding: K. Kawata and D. C. Drucker) opening address.- Session I (Presiding: W. Goldsmith and J. Shioiri).- Macro- and micro-mechanics of high-velocity brittleness and high-velocity ductility of solids.- A technique of short uniaxial stress pulse.- Session II (Presiding: Yi-long Bai and K. Kishida).- Design and applications of a rig for high energy impact tests.- Penetration of rocks by impact of tools.- Session III (Presiding: C. Y. Chiem and J. Harding).- Dynamic plastic response of OFHC copper at high shear strain rates.- Behaviour of materials at high strain rates and cryogenic temperature.- Bifurcation and void formation in dynamically expanded rings.- Session IV (Presiding: I. M. Fyfe and G. Wihlborg).- The deformation and fracture of hybrid reinforced composites under tensile impact.- Shock programmer, uniaxial energy absorber.- Micromechanisms of impact failure in engineering ceramics.- Session V (Presiding: M. Taya and A. T. Yokobori, Jr.).- High strain rate response regimes for dislocated alloy microstructures.- Session VI (Presiding: T. W. Wright).- Stress rate and grain size dependence of dynamic stress intensity factor by dynamical piling-up of dislocations emitted.- Dynamic void growth in a two-phase material under uniaxial tension.- Session VII (Presiding: R. Dormeval).- A constitutive equation of fcc metals at high strain rates based upon the ultrasonic study of dislocation motion.- Adiabatic shear bands in simple and dipolar plastic materials.- Numerical analysis of adiabatic shear band in an early stage of its propagation.- Session VIII (Presiding: S. Kuriyama and Y. Yeshurun).- Heterogeneity of deformation under dynamic loaidng: Influence of a local pre-strain in copper.- Session IX (Presiding: J. Buchar and Q. S. Nguyen).- Computer simulation on the high speed tensile deformation of iron whiskers by molecular dynamics.- Session X (Presiding: M. Doyama and Shihui Huang).- The effect of strain rate sensitivity on crack initiation under dynamic loading.- The dynamic crack propagation problem in coupled thermoelasticity.- Session XI (Presiding: A. Kobayashi and C. Ruiz).- On the formation of the Siljan crater.- A wave-fractographic study of fast fracture in polymers and polymer composites.- Session XII (Presiding: K. B. Broberg and K. Takahashi).- Dynamic crack propagation associated with inner material degradation.- The effect of cracks on the structural strength of beams and portal frames under impact.- Measurement of dynamic stress intensity history for a crack loaded by impact and.- Session XIII (Presiding: N. Sugimoto and Ren Wang).- Plastic stress wave propagation in a circular bar induced by a longitudinal impact.- A study on foreign object damage of rotating fan blades.- Session XIV (Presiding: T. Shioya and K. Tanaka).- On the plastic instability of a liquid filled cylindrical tube under impulsive axial loading.- Buckle propagation in elastic pipelines.- Session XV (Presiding: H. Homma and H. P. Rossmanith).- Bond stress in a laminated composite subjected to an axial impact.- Deformation and flow of a bulky body penetrated by a deformable projectile.- Stress wave propagation in elastic/viscoplastic media containing a spherical cavity.- Session XVI (Presiding: Hong-ki Hong and S. Tanimura).- Study of the initiation and development of adiabatic shear bands for a titanium alloy under high strain rates.- Dynamic contact of solids A dynamic photoelastic investigation.- Closing Session (Presiding: T. Hayashi and Li-lih Wang).- Closing remarks.