کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
779943 1464970 2016 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Failure maps and optimal design of metallic sandwich panels with truss cores subjected to thermal loading
ترجمه فارسی عنوان
نقشه های شکست و طراحی بهینه پانل های ساندویچ فلزی با هسته های تراس تحت بارگذاری حرارتی
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی


• Critical loads of five possible failure modes of SPTCs are derived.
• Failure maps versus thermal loading obtained for various core configurations.
• Optimal result obtained by numerical model instead of confluence of constraints.
• Minimum weight and optimal geometric parameters of SPTCs are obtained.

Sandwich panels with truss cores have been widely investigated due to their superior mechanical performances. When being used in the thermal protection system of a high-speed aircraft, sandwich panels are usually subjected to intense thermal loading and may fail due to various mechanisms. This paper presents a theoretical and numerical analysis on the failure mechanisms and optimal design of metallic sandwich panels with truss cores subjected to uniform thermal loading. Five failure modes are considered: global buckling, face sheet buckling, face sheet yielding, core member buckling and core member yielding. Failure maps of sandwich panels with several truss core topologies are developed based on these failure modes. Taking the five failure modes as constraint conditions, sandwich panels with truss cores are optimally designed for the minimum weight at given thermal loadings. It is found from the optimal analysis that sandwich panels with Kagome and X-type truss cores are more efficient than those with tetrahedral and pyramidal truss cores. Sandwich panels with fully-clamped boundary conditions have superior thermal loading resistance than those with simply-supported boundary conditions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Mechanical Sciences - Volumes 115–116, September 2016, Pages 56–67
نویسندگان
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