کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
779490 1464145 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comparative study of numerical explicit schemes for impact problems
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Comparative study of numerical explicit schemes for impact problems
چکیده انگلیسی

Explicit numerical schemes are used to integrate in time finite element discretization methods. Unfortunately, these numerical approaches can induce high-frequency numerical oscillations into the solution. To eliminate or to reduce these oscillations, numerical dissipation can be introduced. The paper deals with the comparison of three different explicit schemes: the central-difference scheme which is a non-dissipative method, the Hulbert-Chung dissipative explicit scheme and the Tchamwa-Wielgosz dissipative scheme. Particular attention is paid to the study of these algorithms' behavior in problems involving high-velocity impacts like Taylor anvil impact and bullet-target interactions. It is shown that Tchamwa-Wielgosz scheme is efficient in filtering the high-frequency oscillations and is more dissipative than Hulbert-Chung explicit scheme. Although its convergence rate is only first order, the loss of accuracy remains limited to acceptable values.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Impact Engineering - Volume 35, Issue 12, December 2008, Pages 1688–1694
نویسندگان
, , ,