Journals / Bitlis Eren Üniversitesi Fen Bilimleri Dergisi / 2020 / Cilt: 9 - Sayı: 1

Nonlinear Behavior of Initially Imperfect Beams Subjected to Sinusoidal Load

Nonlinear Behavior of Beams Having Initially Small Imperfection Subjected to Sinusoidal Load

Pages
466–477
Publication Date
2020-03-13
DOI
—
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Unlike previous studies on the subject, the diagrams of the deformed shapes of the initially sinusoidal curved beams as well as the diagrams of the internal forces at various stages of the deformation including the prebuckling, buckling and postbuckling states are presented.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:In the present study, the buckling and post-buckling behaviors of beams having small sinusoidal imperfection with pinned ends subjected to sinusoidal loading are examined by using Euler-Bernoulli beam theory.
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Key Findings & Data:The governing differential equations of the geometrically nonlinear problem consisting of the equilibrium equations, kinematical equations and the constitutive equations are converted into algebraic equations via the finite differences and solved numerically by using the Newton-Raphson method.
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Conclusion & Impact:Unlike previous studies on the subject, the diagrams of the deformed shapes of the initially sinusoidal curved beams as well as the diagrams of the internal forces at various stages of the deformation including the prebuckling, buckling and postbuckling states are presented.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Vurgu tipi stabilite · ilkel kusurlu kiriş · doğrusal olmayan denklem

Abstract

In the present study, the buckling and post-buckling behaviors of beams having small sinusoidal imperfection with pinned ends subjected to sinusoidal loading are examined by using Euler-Bernoulli beam theory. The governing differential equations of the geometrically nonlinear problem consisting of the equilibrium equations, kinematical equations and the constitutive equations are converted into algebraic equations via the finite differences and solved numerically by using the Newton-Raphson method. The values of buckling loads and buckling deflections are determined by drawing load-deflection curves. The effect of the initial imperfection on the buckling values is investigated. Unlike previous studies on the subject, the diagrams of the deformed shapes of the initially sinusoidal curved beams as well as the diagrams of the internal forces at various stages of the deformation including the prebuckling, buckling and postbuckling states are presented.

Özet

Bu çalışmada, sinüzoidal yüke maruz, uçları sabit mesnetli sinüzoidal sığ kemerlerin burkulma ve burkulma sonrası davranışları Euler-Bernoulli kiriş teorisi kullanılarak incelenmiştir. Denge denklemleri, kinematik denklemler ve bünye denklemlerini içeren, geometrik olarak doğrusal olmayan problemin yönetici diferansiyel denklemleri, sonlu farklar yöntemi ile cebirsel denklemlere dönüştürülmüş ve Newton-Raphson yöntemi kullanılarak sayısal olarak çözülmüştür. Burkulma yüklerin ve burkulma çökmelerin değerleri, yük-çökme eğrileri çizilerek belirlenmiştir. İlkel kusurun burkulma değerleri üzerindeki etkisi incelenmiştir. Konuyla ilgili daha önceki çalışmalardan farklı olarak; başlangıçta sinüzoidal kavisli olan kirişlerin, şekil değiştirmenin çeşitli aşamalarındaki elastik eğri diyagramlarının yanı sıra; burkulma öncesindeki, burkulma sırasındaki ve burkulma sonrasındaki durumlarına karşı gelen kesit tesirlerinin diyagramları sunulmuştur.

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Cite This Article

ATACAN, A. T., YÜKSELER, R. F. (2020). Nonlinear Behavior of Initially Imperfect Beams Subjected to Sinusoidal Load. Bitlis Eren Üniversitesi Fen Bilimleri Dergisi, Cilt: 9 - Sayı: 1, 466–477. https://ajindex.com/articles/477638

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References (10)

  1. Das K., Batra R.C. 2009.
  2. Symmetry Breaking, Snap-Through and Pull-In Instabilities under Dynamic Loading of Microelectromechanical Shallow Arches, Smart Materials and Structures, 18 (11): Article Number: 115008. Gerson Y., Krylov S., Ilic B. 2010. Electrothermal Bistability Tuning in a Large Displacement Micro Actuator, J. Micromech. Microeng., 20 (11): Article Number: 112001.
  3. Medina L., Gilat R., Ilic B., Krylov S. 2014. Experimental Investigation of the Snap-Through Buckling of Electrostatically Actuated Initially Curved Pre-Stressed Micro Beams, Sensors and Actuators A: Physical, 220 (1): 323–332.
  4. Beharic J., Lucas T.M., Harnett C.K. 2014. Analysis of a Compressed Bistable Buckled Beam on a Flexible Support, Journal of Applied Mechanics-Transactions of the ASME, 81 (8): Article Number: 081011. Chen X., Meguid S.A. 2015. Snap-Through Buckling of Initially Curved Microbeam Subject to an Electrostatic Force, Proceedings of the Royal Society A-Mathematical Physical and Engineering Sciences, 471 (2177): Article Number: 20150072. Bradford M.A., Uy. B., Pi Y.L. 2002. In-plane Elastic Stability of Arches under a Central Concentrated Load, Journal of Engineering Mechanics-ASCE, 128 (7): 710–719.
  5. Chen J.S., Ro W.C., Lin J.S. 2009. Exact Static and Dynamic Critical Loads of a Sinusoidal Arch under a Point Force at the Midpoint, Int. J. Nonlin. Mech., 44 (1): 66-70.
  6. Moon J., Yoon K.Y., Lee T.H., Lee H.E. 2007. In-plane Elastic Buckling of Pin-Ended Shallow Parabolic Arches, Eng. Struct., 29 (10): 2611–2617.
  7. Hu C-F, Pi, Y-L, Li Li W.G. 2018. In-Plane Non-Linear Elastic Stability of Parabolic Arches with Different Rise-to Span Ratios, Thin-Walled Structures, 129: 74–84.
  8. Fung Y.C., Kaplan A. 1952. Buckling of Low Arches or Curved Beams of Small curvature, NACA Technical Note, No: 2840. Simitses G.J., Hodges D.H. 2006. Fundamentals of Structural Stability. Elsevier, Burlington, MA. Luu A.T., Lee J. 2016. Non-Linear Buckling of Elliptical Curved Beams, International Journal of Non Linear Mechanics, 82: 132–143.
  9. Liu N., Plucinsky P., Jeffers A.E. 2017. Combining Load-Controlled and Displacement-Controlled Algorithms to Model Thermal-Mechanical Snap-Through Instabilities in Structures, J. Eng. Mech., 143 (8): Article Number: 04017051. Tsiatas G.C., Babouskos N.G. 2017. Linear and Geometrically Nonlinear Analysis of Non-Uniform Shallow Arches under a Central Concentrated Force, Int. J. Non-Linear Mech., 92: 92–101. Mathews J.H. 1992.
  10. Numerical Methods for Mathematics, Scie