Experimental and numerical study of multilayer sandwich structure with corrugated core under quasi-static load

نوع: Type: thesis

مقطع: Segment: masters

عنوان: Title: Experimental and numerical study of multilayer sandwich structure with corrugated core under quasi-static load

ارائه دهنده: Provider: amirhossein delroz

اساتید راهنما: Supervisors: dr. hashem mazaheri

اساتید مشاور: Advisory Professors: dr. mehdi shaban

اساتید ممتحن یا داور: Examining professors or referees: dr sanei and dr fadaei

زمان و تاریخ ارائه: Time and date of presentation: october 25 - 15:00 oclock

مکان ارائه: Place of presentation: Buali sina university

چکیده: Abstract: Sandwich structures with corrugated cores have attracted the attention of many researchers in recent years. These types of structures have found various applications in various industries due to lightness of this structure, good strength and high energy absorption. In this study, the behavior of a seven-layer sandwich structure with three trapezoidal corrugated cores under quasi-static compressive load has been investigated numerically and experimentally. The outer cores of the structure are symmetrically oriented relative to each other and the interior core is cross-oriented relative to the other two cores. First, a prototype was built and, by using a quasi-static compressive test specific energy absorption and peak force of it were determined. A reliable finite element model was obtained by using ABAQUS which was in good agreement with the experimental results. Thereafter, the most optimal structure with constant weight and constant total height of the structure was obtained by changing geometric parameters of the structure by numerical study in ABAQUS. The obtained optimal structure was manufactured and exposed to quasi-static compressive test. Then, the accuracy of numerical studies was checked and validated by the experimental results. The energy absorption for the optimized structure is increased by about 32% compared to the initial one. Also, the maximum force that the structure can withstand is about 24.5% more than the prototype. Finally, the effect of the geometric parameters of the optimized structure, such as: sheet thickness, angle of inclined sheets of corrugated cores and on the specific energy absorption and peak force of the structure was investigated numerically

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