Elipsel Delikli Plakalarda Oluşan Gerilmelerin Tanımlanması ve Yapay Sinir Ağları ile Tahmini

Bu çalışma kapsamında, elipsel delik açılmış plakalar üzerinde çekme kuvveti etkisi altında oluşan maksimum çekme gerilme değerlerinin hesaplamaları yapılmıştır. Bu hesaplamalar yapay sinir ağları ile modellenmiştir. Aynı zamanda bu plakalar üzerinde oluşan gerilme değerleri Ansys ortamında sonlu elemanlar yöntemiyle analizleri gerçekleştirilerek incelemeleri yapılmıştır. Matematiksel olarak hesaplanan gerilme değerleri, Ansys analizleri sonuçları ve Yapay Sinir Ağları (YSA) ile elde edilen sonuçlarla kıyaslanmış grafikler ve tablolar halinde gösterilmiştir. Bu plakalar için seçilen malzemelere ait elastisite modülleri (52500 MPa, 70000 MPa, 105000 MPa, 210000 MPa), uygulanan kuvvetler (1000 N, 2000 N, 3000 N, 4000 N, 5000 N, 10000 N, 15000 N, 20000 N) parametrik olarak uygulanmıştır. Farklı mesh boyutlarına göre sonuçlarında oluşan değişimler gözlemlenmiştir. Tüm sonuçlar grafikler ve çizelgeler halinde gösterilmiştir

The Definition and Prediction of Stress Analysis of Plates with Elliptic Hole by Artificial Neural Networks

In this study, maximum tensile stress values on plates with elliptic hole which are exposed to tensile strength have been calculated. These calculations have been modelled by Artificial Neural Networks (ANN). Besides, finite elements analysis has been modelled and investigated using Ansys software. Emprical, FEA and ANN results were compared and shown on graphics and tables. Loads (1000N, 2000N, 3000N, 4000N, 5000N, 10000N, 15000N, 20000N) and Young's Modulus (52500MPa, 70000MPa, 105000MPa, 210000MPa) values have been assumed as parametric inputs. Ansys results were taken under different mesh sizes on plates. All results were shown on charts and images

___

  • l] M. H. Lee Wu, "Analysis of Plane-Stress Problems with Axial Symmetry in Strain Hardening Range",NACA TR 1021 (1951).
  • B. Budiansky and O. L. Mangasarian, "Plastic stress concentration at a circular hole in an infinite sheet subjected to equal biaxial tension", J. appl. Mech. 27, 59 (1960).
  • 1. S. Tuba, "Elastic-plastic stress and strain concentration factors at a circular bole in a uniformly stressed infinite plate" J. appl. Mech. 32. 710 (1965).
  • B. Budiansky and R. 1. Vidbnseka, "Analysis of Stress in the Plastic Range Around a Circular Hote in a Plate Subjected to Uniaxial Tension", NACA TN 3542 (1955).
  • I. S. Tuba, "An analytic method for elastic-plastic solution", Inr. J. Soli& Sfruct. 3,543 ( 1967).
  • E. F. Rybiciu and M. F. Ranninen, "A finite element calculation of stress intensity factors by a modified crack closure integral", Vol. 9, pp. 931-938, Engineering Fracture Mechanics (1977).
  • John H. Crews, Jr., C. S. Hong and I. S. Raju, "Stress-Concentration- Orthotropic Laminates With a Pin-Loaded Hole" NASA Technical Paper 1862, (1981). for Finite
  • Hwai-Chung Wu, Bin Mu, "On stress concentrations for isotropic/orthotropic plates and cylinders with a circular hole", Composites: Part B 34, pp. 127-134, (2003).
  • Yih - Hsing Pao, "Dynamical Stress Concentration in an Elastic Plate", Transactions Of Asme, pp. 299-305, (1962).
  • N. Troyani, C. Gomes, G. Sterlacci, "Theoretical Stress Concentration Factors for Short Rectangular Plates Transactions of the ASME, Vol. 124, pp. 124-128, (2002). Circular Holes",
  • Q. Z Wang, "Simple formulae for the stress concentration dimensional holes in finite domains", Journal Of Strain Analysis Vol. 37, No. 3, (2002). three
  • Zheng Yang, "The concentration of stress and strain in finite thickness elastic plate containing a circular hole", International Journal of Solids and Structures 4, pp. 713-731, (2008).
  • P. Weißgraeber* et. Al., "Cracks at elliptical holes: Stress intensity factor and Finite Fracture Mechanics solution.", European Journal of Mechanics A/Solids 55, pp.192-198, (2016).
  • G. Catalanotti*, P.P. Camanho, "A semi-analytical method mechanically laminates", Composites Science and Technology 76, pp. 69-76, (2013) joints composite in
  • Lotfi Toubal, Moussa Karama *, Bernard Lorrain, "Stress concentration in a circular hole in composite plate", Composite Structures, No. 68, pp. 31-36, (2005)
  • Peterson, "Stress concentration factors Ktg for an elliptical hole in an infinite panel in tension", 334, (1913)