An Investigation into Free Flexural Vibration of Defective ۳D-PrintedPLA Beams with Embedded Delamination
سال انتشار: 1401
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 116
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شناسه ملی سند علمی:
INCWI23_051
تاریخ نمایه سازی: 16 اسفند 1401
چکیده مقاله:
Polylactic acid (PLA), is a versatile, thermoplastic, biodegradable, and oneof the most eco-friendly polymers widely used in ۳D printing and manufacturing ofelements used in healthcare, textile, packaging, bio-medical devices, as well as low-costbio-composite materials used in aerospace structural components. Therefore, thecharacterization of the filaments and the printed parts is essential for determiningquality, controlling manufacturing processes, and making accurate model predictions ofprocedure and product performance. In the present study, the flexural vibration analysisof a defective ۳D-printed PLA beam will be presented. Experimental and FEM-basednumerical free vibration analyses of a cantilever beam specimen, with embeddeddelamination, are presented. The defect is a single, symmetric, through-the-width,centrally located, delamination, covering one-third of the beam’s length. The averageexperimental frequency values are calculated based on three different trials, conductedto ensure the accuracy of the obtained results. Numerical results, including fundamentalflexural frequencies and corresponding mode shapes, obtained through simulationscarried out using Finite Element Analysis (FEA) software are also reported anddiscussed. The comparison is made between the frequency results obtained from twonumerical (FEM) models and the experimental ones. The first FEM model assumed auniform delamination zone, whereas the second one was created considering thenonuniformity of the defective region. It is observed that the numerical natural frequencyobtained from the latter model corresponds better with the experimental values.
کلیدواژه ها:
نویسندگان
Seyed M Hashemi
Professor, Department of Aerospace Engineering, Toronto Metropolitan University,Toronto (ON), Canada
Bhargava Ram Mudumby
MEng graduate student, Department of Aerospace Engineering, Toronto MetropolitanUniversity, Toronto (ON), Canada