Browse Dept. of Theoretical and Applied Mechanics (1926-2006) by Title

  • Anderson, Daniel M.; Cermelli, Paolo; Fried, Eliot; Gurtin, Morton E.; McFadden, Geoffrey B. (Department of Theoretical and Applied Mechanics (UIUC), 2005-04)
    We develop a complete set of equations governing the evolution of a sharp interface separating two fluid phases undergoing transformation. In addition to the conventional balances for mass, linear momentum, and energy these ...
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  • Thoroddsen, Sigurdur T.; Shen, Amy Q. (Department of Theoretical and Applied Mechanics (UIUC), 2000-05)
    Worthington jets are a familiar sight in light rain upon puddles and ponds. These narrow vertical jets are formed by the radial collapse of the liquid "craters" produced by the impacting rain drops. Such jets can also be ...
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  • Thoroddsen, Sigurdur T.; Shen, Amy Q. (American Institute of Physics, 2001-01)
    When a solid sphere impacts on a deep layer of granular medium, it generates an ejecta sheet and a transient axisymmetric crater. The gravity-driven radial collapse of this crater generates a pressure spike, as the cavity ...
    untranslated PDF (229KB)
  • Fried, Eliot; Roy, Bidhan C. (Department of Theoretical and Applied Mechanics (UIUC), 2002-07)
    Working with the context of a theory proposed recently by Fried et al. (2001), we consider a one-dimensional problem involving granular mixture of K > 2 discrete sizes bounded below by an impermeable base, above by an ...
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  • Bhattacharjee, Pratik; Riahi, Daniel N. (Department of Theoretical and Applied Mechanics (UIUC), 2005-12)
    Microgravity conditions pose unique challenges for fluid handling and heat transfer applications. By controlling (curtailing or augmenting) the buoyant and thermocapillary convection, the latter being the dominant convective ...
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  • Yoo, Sunhee; Stewart, D. Scott (Department of Theoretical and Applied Mechanics (UIUC), 2004-02)
    We present an accurate and fast wave tracking method that uses parametric representations of tracked fronts, combined with modifications of level-set methods that use narrow bands. Our strategy generages accurate computation ...
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  • Brown, Eric N.; Kessler, Michael R.; Sottos, Nancy R.; White, Scott R. (Department of Theoretical and Applied Mechanics (UIUC), 2003-02)
    Microencapsulated healing agents that possess adequate strength, long shelf-life, and excellent bonding to the host material are required for self-healing materials. Ureaformaldehyde microcapsules containing dicyclopentadiene ...
    untranslated PDF (2MB)
  • Liu, Ming; Hsia, K. Jimmy; Sardela, Mauro, Jr. (Department of Theoretical and Applied Mechanics (UIUC), 2003-05)
    In-situ x-ray experiments were conducted to examine the electric-field-induced phase changes in PZT-5H materials. The x-ray diffraction profiles at different electric field levels were analyzed by peak fitting and used to ...
    untranslated PDF (760KB)
  • Fried, Eliot; Sellers, Shaun (Department of Theoretical and Applied Mechanics (UIUC), 2005-08)
    In a nematic elastomer the deformation of the polymer network chains is coupled to the orientational order of the mesogenic groups. Here we use the neo-classical model for this coupling supplemented by the usual Frank ...
    untranslated PDF (271KB)
  • Fried, Eliot; Sellers, Shaun (American Institute of Physics, 2006)
    In a nematic elastomer the deformation of the polymer network chains is coupled to the orientational order of the mesogenic groups. Statistical arguments have derived the so-called neoclassical free energy that models this ...
    untranslated PDF (199KB)
  • Riahi, Daniel N. (2006-01)
    Flow instability due to oscillatory modes of disturbances in a horizontal dendrite layer during alloy solidification is investigated under an external constraint of rotation. The flow in the dendrite layer, which is ...
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  • Riahi, Daniel N. (Department of Theoretical and Applied Mechanics (UIUC), 2006-02)
    Inertial effects on flow instabilities in a horizontal reactive porous layer with deformed upper boundary are studied using a linear stability analysis and under the condition that the porous layer, which is also referred ...
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  • Zhang, Sulin; Panat, Rahul P.; Hsia, K. Jimmy (Department of Theoretical and Applied Mechanics (UIUC), 2002-10)
    Adhesively bonded aluminum joints have been increasingly used in automotive industry because of their structural and functional advantages. Interfacial debonding in these joints has become a major concern limiting their ...
    untranslated PDF (614KB)
  • Liu, Ming; Hsia, K. Jimmy (Department of Theoretical and Applied Mechanics (UIUC), 2001-12)
    Evaluation of crack tip driving force for interfacial cracks between piezoelectric actuators and elastic substrates is crucial to successful applications of smart materials and smart structures. Here the behavior of an ...
    untranslated PDF (267KB)
  • Ji, Huidi; Mourad, Hashem; Fried, Eliot; Dolbow, John E. (Department of Theoretical and Applied Mechanics (UIUC), 2004-12)
    We present a continuum model for thermally-induced volume transitions in stimulus-responsive hydrogels (SRHs). The framework considers the transition as driven through the motion of a sharp interface separating swollen and ...
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  • Phillips, W.R.C. (Department of Theoretical and Applied Mechanics (UIUC), 2001-11)
    Langmuir circulations in the open ocean typically form in an environment of surface waves and a shear current, and a mechanism which exploits these features and leads to shear-aligned longitudinal vortices much like Langmuir ...
    untranslated PDF (206KB)
  • Gioia, Gustavo; Bombardelli, Fabian A. (Department of Theoretical and Applied Mechanics (UIUC), 2005-05)
    In many applications a sustained, localized turbulent flow scours a cohesionless granular bed to form a pothole. Here we use similarity methods to derive a theoretical formula for the equilibrium depth of the pothole. ...
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  • Gioia, Gustavo; Bombardelli, Fabian A. (American Physical Society, 2005)
    In many applications a sustained, localized turbulent flow scours a cohesionless granular bed to form a pothole. Here we use similarity methods to derive a theoretical formula for the equilibrium depth of the pothole. ...
    untranslated PDF (99KB)
  • Liu, Ming; Hsia, K. Jimmy (Department of Theoretical and Applied Mechanics (UIUC), 2003-05)
    In-situ x-ray diffraction measurements are conducted on a polycrystalline ferroelectric material PZT-5H at different levels of static electric field. The locking of the electric field induced non-180° domain switching and ...
    untranslated PDF (430KB)
  • Liu, Ming; Hsia, K. Jimmy (American Institute of Physics, 2003)
    In situ x-ray diffraction measurements are conducted on a polycrystalline ferroelectric material lead-zironate-titanate-5H at different levels of static electric field. The locking of electric-field-induced non-180° ...
    untranslated PDF (111KB)