تطبيق طريقة العناصر المحدودة الممتدة (XFEM) لنمذجة سلوك نمو شقوق التعب لبعض سبائك الألومنيوم
DOI:
https://doi.org/10.51984/sucp.v4i3.4101الكلمات المفتاحية:
طريقة العناصر المحدودة الممتدة (XFEM)، نمو شقوق التعب (FCG)، دورات الفشل (Nf)، الأنسز (ANSYS)، سبائك الألومنيوم 2024-T3 ، AA2060 ، 7075-T73الملخص
نمو شقوق التعب (FCG) هو مصدر قلق بالغ الأهمية فيما يتعلق بالسلامة الهيكلية لمكونات الألومنيوم المستخدمة في تطبيقات الطيران والسيارات والصناعة. يبحث هذا البحث في سلوك نمو شقوق التعب لسبائك الألومنيوم 2024-T3 وAA2060 و7075-T73 باستخدام طريقة العناصر المحدودة الممتدة (XFEM). أجريت عمليات محاكاة عددية في ANSYS 19.1 لتحليل انتشار الشقوق وعوامل شدة الإجهاد وعمر التعب تحت حمل شد ثابت قدره 40 ميجا باسكال عبر نسبة الإجهاد (R = -1). أظهرت النتائج أن أقل معدل نمو شقوق تعب (FCGR) تم تسجيله لسبائك 2024-T3، بينما كان الأعلى لسبائك AA2060. يعطي (FCGR) الأقل أطول عدد دورات الفشل (Nf)؛ كان لدى 2024-T3 أطول عدد من دورات الفشل. تثبت هذه الدراسة صحة) (XFEM كأداة فعالة لنمذجة سيناريوهات نمو شقوق التعب المعقدة وتوفر رؤى قيمة لتقييم عمر التعب في مكونات سبائك الألومنيوم.
المراجع
Faisal Khalil Ibrahim, ”The Effects OF Stress Ratio, Compressive Peak Stress and Maximum Stress Level on Fatigue Behaviour of 2024-T3 Aluminium Alloy”, Fatigue of Engineering Materials, vol. 12, pp.1-8, 1989.
Mer. G. Btltr and Metin Harun, ’’Effect of Stress Ratio on the Rate of Growth of Fatigue Cracks in 1100 Al-Alloy’’, Engineering Fracture Mechanics, Vol. 37, No. 6, pp. 1203-1206, 1990.
E. Donnelly a, D. Nelson b,’’ A study of small crack growth in aluminium alloy 7075-T6’’, International Journal of Fatigue 24 (2002) 1175–1189.
Ouf A. Shams, Bassam Ali Ahmed, Hasan Shakir Majdi,’’ Comparative Analysis of Aluminium Alloys 2024 and 7085 under Thermal Fatigue and Crack Propagation, International Journal of Heat and Technology, Vol. 41, No. 4, August 2023, pp. 929-936.
Torsten Fischer,’’ Fatigue Cracking of Additively Manufactured Materials Process and Material Perspectives’’, Applied Science 2020, 10(16), 5556; https://doi.org/10.3390/app10165556].
Mustafa Adarwish, Aleksandar Grbovic’, Gordana Kastratovic’, Aeksandar Sedmak and Mirjana Lazuc’, ‘’ Stress Intensity factors evaluation at tips of multi-site cracks in unstiffened 2024-T3 aluminium panel using XFEM, Tehnick vjesnik, Vol. 25 (2018) 1616-1622.
M. Adarwish, A. Grbovic’, G. Kastratovic’, A. Sedmak and N. Vidanovic’, ‘Numerical assessment of stress intensity at tips of multi-cracks in unstiffened panel’, Structural Integrity and Life 17 (1), 11-17, 2017.
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التنزيلات
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2025-10-12
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