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The numerical analysis of dynamically loaded ceramic: A crack softening approach

By P. J. Hazell and M. J. Iremonger

Abstract

A physically based crack softening approach to modelling the failure of brittle materials that have been subjected to dynamic loading is presented and applied to a two-dimensional non-linear transient dynamic hydrocode. It is assumed that there are a number of evenly distributed and orientated micro flaws within the brittle material that are activated by a dynamically applied stress. Modes I and II stress intensity factors are calculated and compared to critical values, at which point the cracks grow at a velocity dependent on mode I stress intensity factor. The strength of the ceramic is degraded according to the length of the cracks. A simulation of a steel sphere impacting and penetrating a ceramic target at 1500 m/s is presented. Comparisons are drawn from experimental data

Topics: crack-softening, hydrocode, dynamic, failure, ceramic, strength loss
Publisher: John Wiley & Sons, Ltd
Year: 2000
OAI identifier: oai:dspace.lib.cranfield.ac.uk:1826/5495
Provided by: Cranfield CERES
Journal:

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Citations

  1. (1990). A Constitutive Model for the Dynamic Response of Brittle Materials. doi
  2. (1987). A Constitutive Theory for Progressively Deteriorating Brittle Solids. doi
  3. (1987). A Finite Element Material Model for Microfracture -Damaged Brittle Rock. Sandia
  4. (1986). A Micromechanical Model for Concrete. doi
  5. (1995). A Micromechanical Model for High Strain Rate Behaviour of Ceramics. doi
  6. (1963). A Note on Brittle Crack Growth in Compression. doi
  7. (1986). Brittle Failure in Compression: Splitting, Faulting and Brittle-Ductile Transition. doi
  8. (1991). Century Dynamics Ltd. Dynamics House,
  9. (1997). Characterisation of the Material Failure and Fracture Propagation in Brittle Materials subjected to High Strain Rates. Lightweight Armour Systems Symposium, Royal Military College of Science,
  10. (1990). CM1 – A Simple Model for the Dynamic Deformation and Failure Properties of Brittle Materials. doi
  11. (1985). Compression-Induced Microcrack Growth in Brittle Solids: Axial Splitting and Shear Failure. doi
  12. (1977). Compressive Strength and Microplasticity in Polycrystalline Alumina. doi
  13. (1997). Crack Softening Damage Model for Ceramic Impact and its Application within a Hydrocode. doi
  14. (1997). Cylindrically Symmetric SPH Simulations of Hypervelocity Impacts on Thin Plates. doi
  15. (1992). Dynamic Damage Evolution in Brittle Solids. doi
  16. (1990). Dynamic Fracture Mechanics, doi
  17. Dynamic Fracture of Ceramics. doi
  18. (1990). Dynamic Fracture Responses of Alumina and Two Ceramic Composites. doi
  19. (1956). Effect of Porosity on Physical Properties of Sintered Alumina. doi
  20. (1983). Elastic Moduli of a Cracked Body. doi
  21. (1979). Erosion of Ceramic Materials: The Role of Plastic Flow.
  22. (1983). Evaluation of Dynamic Crack Instability Criteria. doi
  23. (1983). Evidence of Strength Degradation by Subcritical Crack
  24. (1988). Is the Dynamic Strength of Alumina Rate Dependent?
  25. (1984). Measurement of the Dynamic Fracture Toughness Based on the Split Hopkinson Bar Technique.
  26. (1994). Modeling the Shock Response of AD995 Alumina.
  27. (1994). Modelling of Long Rod Penetration into Alumina Ceramic, Defence Research Agency Report DRA/FVS/AM/CR94012/1.0,
  28. (1995). On the Strength of Ceramics with Cavities. doi
  29. (1985). On the Uniqueness of the Stress Intensity Factor – Crack Velocity Relationship. doi
  30. (1989). Plasticity and Microcracking in Shock-Loaded Alumina. doi
  31. (1994). Prediction of Material Strength and Fracture of Glass Using the SPHINX Smooth Particle Hydrodynamics Code, doi
  32. (1997). Shattered Ceramic and their Effectiveness as Armour.
  33. (1994). Strain-Rate Effect on Brittle Failure in Compression. doi
  34. (1990). Tensile Fracture Toughness of Ceramic Materials: Effects of Dynamic Loading and Elevated Temperatures. doi
  35. The Compressive Failure of Alumina Containing Controlled Distributions of Flaws. doi
  36. (1990). The Damage Mechanics of Brittle Solids in Compression. doi
  37. (1986). The Failure of Brittle Solids Containing Small Cracks Under Compressive Stress States. doi
  38. (1998). The Failure of Ceramic Armour Subjected to High Velocity Impact. EngD Thesis,
  39. (1994). The Influence of the Material Properties of Alumina on Ballistic Performance. Defence Research Agency Report DRA/FV&S/AM/TR94003/1.0,

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