Development of lagrangian hydrocode modelling for debris impact damage prediction

✍ Scribed by J. Campbell; R. Vignjevic

• Book ID: 104344156
• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 649 KB
• Volume: 20
• Category: Article
• ISSN: 0734-743X
• DOI: 10.1016/s0734-743x(97)87488-x

✦ Synopsis

Work on improving the Lawrence Livermore DYNA3D code to allow it to accurately model hypervelocity impact is presented. The unmodified version of DYNA3D was tested, results showed that improvements were required in three main areas: material modelling, the element erosion criterion, the ability to model the debris cloud formed by a thin plate impact. The SESAME Equation of State has been implemented to improve the material modelling. To improve the element erosion criterion two different criterion have been implemented and tested. The first is based on total element deformation and shows improved results for semi-infinite and thin plate targets. The second is intended to delete an element when it becomes numerically inaccurate. Initial results show the limitation of the Lagrangian finite element approach and that further improvement is required.