CTH reference manual : composite capability and technologies.

Key, Christopher T. ; Schumacher, Shane C.

Sandia National Laboratories

关键词: Motors;    Mechanics, Applied.;    Velocity Mechanics, Applied.;    Shock Waves-Mathematics.;    36 Materials Science;   

DOI  :  10.2172/952164
RP-ID  :  SAND2009-0403
RP-ID  :  AC04-94AL85000
RP-ID  :  952164

美国|英语

来源: UNT Digital Library

【 摘 要 】

The composite material research and development performed over the last year has greatly enhanced the capabilities of CTH for non-isotropic materials. The enhancements provide the users and developers with greatly enhanced capabilities to address non-isotropic materials and their constitutive model development. The enhancements to CTH are intended to address various composite material applications such as armor systems, rocket motor cases, etc. A new method for inserting non-isotropic materials was developed using Diatom capabilities. This new insertion method makes it possible to add a layering capability to a shock physics hydrocode. This allows users to explicitly model each lamina of a composite without the overhead of modeling each lamina as a separate material to represent a laminate composite. This capability is designed for computational speed and modeling efficiency when studying composite material applications. In addition, the layering capability also allows a user to model interlaminar mechanisms. Finally, non-isotropic coupling methods have been investigated. The coupling methods are specific to shock physics where the Equation of State (EOS) is used with a nonisotropic constitutive model. This capability elastically corrects the EOS pressure (typically isotropic) for deviatoric pressure coupling for non-isotropic materials.