Johnson Holmquist Ceramics

The johnson holmquist model for simulating impact and penetration into ceramic and glass materials is commonly used in continuum hydrocodes.

Johnson holmquist ceramics.

The johnson holmquist material model jh 2 with damage is useful when modeling brittle materials such as ceramics subjected to large pressures shear strain and high strain rates. Kaufmann and grant j mcintosh and todd berstad year 2003. The compression tests simulated for verification of determined jh 2 constants and finally validated by conducting the eoi simulations on glass plates to the spherical and cylindrical shaped projectile. In order to define proper material behavior johnson holmquist ceramics material model for b 4 c and plastic kinematic material model for al6061 t6 4340 steel and epoxy resin was used.

By incorporating the compression and tensile test data johnson holmquist ceramic jh 2 model parameters were estimated for aluminosilicate glass. The johnson holmquist ceramic constitutive model was first proposed to describe the response of brittle materials to large deformations. Implementation and validation of the johnson holmquist ceramic material model in ls dyna inproceedings cronin2003implementationav title implementation and validation of the johnson holmquist ceramic material model in ls dyna author d. The constitutive behaviour of alumina ceramics at high strain rates was quantified using the johnson holmquist material model with damage jh 2 a widely accepted model for brittle materials subjected to high loading rates high pressure and large deformation.

The first version of the model jh 1 did not allow for progressive damage of the material. In recent years johnson holmquist and their coworkers have developed a series of constitutive relations to simulate the response of ceramic materials under large strain high strain rate and high pressure impacting conditions. Ceramic materials are commonly used in armor protection applications.