کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
779580 1464169 2006 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hypervelocity impact computations with finite elements and meshfree particles
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Hypervelocity impact computations with finite elements and meshfree particles
چکیده انگلیسی

The ability of computations to model characteristics of hypervelocity impact is demonstrated using an algorithm for the automatic conversion of distorted finite elements to meshfree particles. The Lagrangian formulation tracks material boundaries and properties without the errors typical in an Eulerian formulation as the material traverses large distances. A computation of a sphere impacting a bumper is shown to reproduce three regions in the debris cloud that are observed in tests: a front region composed of droplets of melted projectile and target, a middle region of fragmented projectile, and a back region of spalled projectile. Additional computations reproduce the observed traits that result from variations in the projectile shape and obliquity. The computation of a projectile impacting spaced plates demonstrates the ability of the method to model the damage to the rear plate of a Whipple shield for spacecraft protection.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Impact Engineering - Volume 33, Issues 1–12, December 2006, Pages 80–90
نویسندگان
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