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تحلیل اثر جهت چاپ و بارگذاری بر خواص مکانیکی و رفتار شکست پلیمر پلیلاکتیک اسید تولیدشده با روش ساخت افزایشی | ||
| نشریه مهندسی مکانیک امیرکبیر | ||
| دوره 57، شماره 3، خرداد 1404، صفحه 379-398 اصل مقاله (1.63 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22060/mej.2025.24127.7843 | ||
| نویسندگان | ||
| الیاس حدادی* 1؛ محمدرضا آدی بیگ2؛ ابوذر اسحقی اسکویی3، 4 | ||
| 1گروه مهندسی مکانیک، دانشگاه ملی مهارت، تهران، ایران | ||
| 2دانشکده مهندسی مکانیک، دانشگاه علم و صنعت جنوب، شنزن، چین | ||
| 3موسسه موگانشان، دیچینگ، چین | ||
| 4آزمایشگاه ماشینهای دوار پرسرعت، دانشگاه جیجیانگ، هانگژو، چین | ||
| چکیده | ||
| خواص مکانیکی و مقاومت در برابر رشد ترک نمونههای پلیلاکتیک اسید تولیدشده به روش ساخت افزایشی مورد بررسی قرار گرفت. هدف اصلی، ارزیابی تأثیر جهتگیری چاپ بر رفتار مکانیکی نمونهها تحت بارهای کششی و برشی بود. نمونهها در سه جهت چاپ ˚0، ˚90 و ˚09/˚0 تهیه شدند. این جهتگیریها به ترتیب نشاندهنده چاپ لایهها در راستای طولی، عرضی و ترکیبی بودند. نتایج نشان داد که تغییر جهت چاپ از ˚0 به ˚90 یا ˚09/˚0 باعث افزایش قابلتوجه بیشینه تنش کششی به میزان حدود %39 و کرنش پیش از شکست بهطور متوسط %30 شد. این امر به دلیل تفاوت در چیدمان لایهها و توزیع تنش در ساختار داخلی نمونهها بود. برای بررسی مقاومت در برابر رشد ترک، از آزمونهای شکست در مودهای کششی و برشی استفاده شد. نمونههای پروانهای شکل و با گیره آرکان اصلاحشده آزمایش شدند. همچنین ضرایب هندسی متناظر با جهات بارگذاری با استفاده از شبیهسازی المان محدود استخراج شد. نتایج نشان داد که مقادیر بحرانی انرژی شکست در مود برشی نسبت به مود کششی حدود %58 کاهش داشته است. همچنین، نمونههای چاپشده در جهت ˚90 به دلیل ضعف در اتصال بینلایهای، مقاومت کمتری در برابر رشد ترک نسبت به جهتهای ˚0 و ˚90/˚0 از خود نشان دادند. در نهایت، از میان موارد بررسی شده، جهت ˚90/˚0 به دلیل برقراری تعادل مطلوب میان استحکام کششی بالا و مقاومت مناسب در برابر رشد ترک، بهعنوان جهتگیری بهینه پیشنهاد گردید. | ||
| کلیدواژهها | ||
| ساخت افزایشی؛ پلیلاکتیک اسید؛ خواص مکانیکی؛ جهت چاپ؛ گیره آرکان | ||
| عنوان مقاله [English] | ||
| Investigation of the Effect of Printing Orientation and Loading Direction on the Mechanical Properties and Fracture Behavior of Additively Manufactured Polylactic Acid | ||
| نویسندگان [English] | ||
| Elyas Haddadi1؛ Mohammad Reza Adibeig2؛ Abuzar Eshaghi Oskui3، 4 | ||
| 1Department of Mechanical Engineering, Technical and Vocational University (TVU), Tehran, Iran | ||
| 2Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen, 518055, China | ||
| 3Moganshan Institute ZJUT, Kangqian District, Deqing 313200, China|High-speed Rotating Machinery Laboratory, Zhejiang University, Hangzhou 310027, China | ||
| 4Moganshan Institute ZJUT, Kangqian District, Deqing 313200, China|High-speed Rotating Machinery Laboratory, Zhejiang University, Hangzhou 310027, China | ||
| چکیده [English] | ||
| The mechanical properties and crack growth resistance of polylactic acid (PLA) specimens produced via additive manufacturing were investigated. The primary objective was to evaluate the influence of printing orientation on the mechanical behavior of specimens under different loading conditions. Specimens were fabricated with three printing orientations: 0°, 90°, and 0°/90°, representing longitudinal, transverse, and bidirectional layer arrangements, respectively. The results revealed that changing the printing orientation from 0° to 90° or 0°/90° significantly increased the maximum tensile stress by approximately 39% and the strain at failure by an average of 30%. To assess crack growth resistance, fracture tests were conducted under tensile (mode-I) and shear (mode-II) loading using butterfly-shaped specimens tested with a modified Arcan fixture. Geometric factors corresponding to different loading orientations were extracted using finite element simulations. The results indicated that the critical strain energy release rate under shear loading was approximately 58% lower than under tensile loading. Additionally, specimens printed at a 90° orientation exhibited lower crack growth resistance compared to those at 0° and 0°/90° due to weaker interlayer bonding. Ultimately, the 0°/90° orientation was identified as optimal, offering a favorable balance between high tensile strength and adequate crack growth resistance. | ||
| کلیدواژهها [English] | ||
| Additive Manufacturing, Polylactic Acid, Mechanical Properties, Printing Orientation, Arcan Fixture | ||
| مراجع | ||
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[1] M. Kazemi and A. Rahimi, Improving the Surface Roughness, Material Consumption and Abrasion Ability of Additive Manufacturing Products by Segmentation Design, Modares Mechanical Engineering 20(3) (2020) 689–699, (in Persian). [2] M.R. Adibeig, F. Vakili-Tahami, and M.-A. Saeimi-Sadigh, Numerical and experimental investigation on creep response of 3D printed Polylactic acid (PLA) samples Part I: The effect of building direction and unidirectional raster orientation, Journal of the Mechanical Behavior of Biomedical Materials 145 (2023) 106025. [3] C.K. Chua and K.F. Leong, 3D Printing and Additive Manufacturing: Principles and Applications, Fifth Edition, (2016). [4] I. Gibson, D.W. Rosen, and B. Stucker, Additive Manufacturing Technologies: 3D Printing, Rapid Prototyping, and Direct Digital Manufacturing, 2nd ed, Springer, New York, (2009). [5] O.H. Ezeh and L. Susmel, On the notch fatigue strength of additively manufactured polylactide (PLA), International Journal of Fatigue 136 (2020) 105583. [6] J. Cao et al., Mechanical simulation and debonding risk analysis of OLED panels with optically clear adhesives, Displays 83 (2024) 102722. [7] J. Cao et al., Large strain mechanical behaviors of optically clear adhesives for flexible electronic devices under different temperature, humidity, and strain rates, Journal of Applied Polymer Science 141(34) (2024) 1-15. [8] M. Domingo-Espin et al., Mechanical property characterization and simulation of fused deposition modeling Polycarbonate parts, Materials & Design 83 (2015) 670–677. [9] M.R. Adibeig et al., Quasi-static simulation and fatigue life estimation of fused filament fabrication of polylactic acid specimens using finite element method, Journal of Manufacturing Processes 106 (2023) 202–213. [10] H. Li et al., The effect of process parameters in fused deposition modelling on bonding degree and mechanical properties, Rapid Prototyping Journal 24(1) (2018) 80–92. [11] D. Farbman and C. McCoy, Materials Testing of 3D Printed ABS and PLA Samples to Guide Mechanical Design, in International Manufacturing Science and Engineering Conference, American Society of Mechanical Engineers, (2016): p. V002T01A015. [12] A. Garg and A. Bhattacharya, An insight to the failure of FDM parts under tensile loading: finite element analysis and experimental study, International Journal of Mechanical Sciences 120 (2017) 225–236. [13] M. Azadi et al., High-cycle bending fatigue properties of additive-manufactured ABS and PLA polymers fabricated by fused deposition modeling 3D-printing, Forces in Mechanics 3 (2021) 100016. [14] A. a. Ahmed and L. Susmel, A material length scale–based methodology to assess static strength of notched additively manufactured polylactide (PLA), Fatigue & Fracture of Engineering Materials & Structures 41(10) (2018) 2071–2098. [15] J.M. Chacón et al., Additive manufacturing of continuous fibre reinforced thermoplastic composites using fused deposition modelling: Effect of process parameters on mechanical properties, Composites Science and Technology 181 (2019) 107688. [16] S. Lin et al., Influence of structural geometry on tensile properties and fracture toughness in 3D printed novel structures, Engineering Failure Analysis 161 (2024) 108277. [17] M.R. Khosravani and T. Reinicke, Effects of printing parameters on the fracture toughness of 3D-printed polymer parts, Procedia Structural Integrity 47 (2023) 454–459. [18] M.R. Khosravani et al., Optimization of fracture toughness in 3D-printed parts: Experiments and numerical simulations, Composite Structures 329 (2024) 117766. [19] M.R. Ayatollahi et al., The influence of in-plane raster angle on tensile and fracture strengths of 3D-printed PLA specimens, Engineering Fracture Mechanics 237 (2020) 107225. [20] M.R. Adibeig, F. Vakili-Tahami, and M.-A. Saeimi-Sadigh, Parametric study of the load carrying capacity of polyethylene FSSW single strap joints, Polymer 195 (2020) 122434. [21] ASTM D638–14 Standard test method for tensile properties of plastics, (2014). [22] A. Es’haghi Oskui and N. Soltani, Experimental and numerical investigation of the effect of temperature on mixed‐mode fracture behaviour of AM60 Mg alloy, Fatigue & Fracture of Engineering Materials & Structures 42 (2019) 2354-2371. [23] M. Arcan, Z. Hashin, and A. Voloshin, A method to produce uniform plane-stress states with applications to fiber-reinforced materials, Experimental Mechanics 18 (1978) 141–146. [24] J.M. Greer Jr., S.E. Galyon Dorman, and M.J. Hammond, Some comments on the Arcan mixed-mode (I/II) test specimen, Engineering Fracture Mechanics 78(9) (2011) 2088–2094. [25] A. Oskui et al., On the Development of a Testing Device for Fracture Characterization under Mixed-Mode Loading Conditions, in Symposium on Advances in Accelerated Testing and Predictive Methods in Creep, Fatigue, and Environmental Cracking, ASTM International, (2023): pp. 127–140. [26] S. Hashemian, P. Mashhadi Keshtiban, and A. Es’haghi Oskui, Fracture behavior of the forged aluminum 7075-T6 alloy under mixed-mode loading conditions, Eng Fail Anal 140 (2022) 106610. [27] M. Nikbakht and N. Choupani, Experimental investigation of mixed-mode fracture behaviour of woven laminated composite, Journal of Materials Science 44 (2009) 3428–3437. [28] S.A. Abbasabad, M. Zadshakoyan, and A.E. Oskui, Experimental and Numerical Investigation of Multi-pass Equal Channel Angular Rolling Effects on the Mechanical Properties of Aluminum Alloy, J. of Materi Eng and Perform (2025) 1-14. [29] A. Es’haghi Oskui and N. Soltani, Characterization of elastic-plastic fracture toughness of AM60 Mg alloy under mixed-mode loading conditions, Eng Fract Mech 204 (2018) 388–403. [30] T.L. Anderson, Fracture Mechanics: Fundamentals and Applications, 3rd edition, CRC Press, Boca Raton (Fla.), (2004). [31] S. Sangaletti et al., Effect of stacking direction and raster angle on the fracture properties of Onyx 3D printed components: A mesoscale analysis, Theoretical and Applied Fracture Mechanics 129 (2024) 104228. | ||
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