...Kenji Takizawa; Timothy Spielman; Creighton Moorman; Tayfun E. Tezduyar Even though computer modeling of spacecraft parachutes involves a number of numerical challenges, advanced techniques developed in recent years for fluid-structure interaction (FSI) modeling in general and for parachute FSI...

... mathematical model for a particular application so that the simplifications do not affect the data of interest significantly. This involves application of expert knowledge aided by virtual and∕or physical experimentation. An example is presented. 22 07 2004 25 03 2005 shells (structures...

...T. J. Lahey; G. R. Heppler A fabric bending model that includes contributions from nonlinear elasticity, and viscous and Coulomb friction with hysteretic effects is presented. The model allows the recovery of the loading, unloading and hysteresis behaviors observed in the Kawabata evaluation system...

...T. M. Atanackovic, Professor; D. T. Spasic, Professor We study dynamics of a mass, moving on a straight line, and impacting against the rigid wall through a deformable body, that we model as a straight rod of negligible mass. The chosen constitutive model of the viscoelastic body comprises...

... the actuator to expand radially and, due to the fiber constraint, contract longitudinally. This contraction provides a large force that can be used for robotic actuation. Based on large deformation membrane theory, the actuator is modeled as a fiber-reinforced cylinder with applied inner pressure and axial...

... may be less than that of the laminae. Thus, the study of weak bonding is an interesting focus area. In this study, an elastic bonding model based on three-dimensional theory of elasticity in a layerwise framework is used to study composite laminates. The differential quadrature (DQ) discretization...

... such as film/paper blocking (increased interlayer pressure) and roll shifting/cinching (decreased interlayer pressure). To study the storage effect, a nonlinear wound roll stress model including air entrainment is first developed and applied to predict the in-roll stresses during film/paper winding. Thereafter...

..., that is, Guyan condensation, have the forms given in Eq. ( 2 ). This conclusion can be proven simply. After two iterations, both reduced order matrices are fully populated. The further discussion on the dynamic condensation of viscously damped, symmetric models may be found in Refs. 3 4 5 6 . To simplify...

...K. Yagasaki We study a mathematical model for unforced and undamped, initially straight beams. This system is governed by an integro-partial differential equation, and its energy is conserved: It is an infinite-degree-of-freedom Hamiltonian system. We can derive “exact” finite-degree-of-freedom...

...H. Lus¸, Assistant Professor,; M. De Angelis, Assistant Professor,; R. Betti, Professor, This study investigates the possibilities of obtaining reduced order mass-damping-stiffness models of mechanical systems using state space realizations identified via dynamic tests. It is shown that even when...

...W. R. Debesis and; S. J. Burns Two linear elastic models for describing stresses in center-wound rolls have been compared. One model includes wound on residual strains from the web while the other uses a clamped on stress boundary condition. The stress and displacement solutions to these two models...

...C. M. Landis, Mem. ASME A phenomenological constitutive law is developed for the deformation of polycrystalline ferroelastic materials. The model is framed within a thermodynamic setting common to internal variable plasticity. The two significant inputs to this model are a switching (yield) surface...

... properly by fractal models. This paper proposes a normal contact model for a fractal surface in contact with a rigid smooth half-space. The fractal surface is constructed based on the Cantor set and composed of elastic-perfectly plastic material. Asymptotic continuous expressions for the load-displacement...

...E. H. Dowell, Professor,; D. Tang, Research Associate Professor The large number of degrees-of-freedom of finite difference, finite element, or molecular dynamics models for complex systems is often a significant barrier to both efficient computation and increased understanding of the relevant...

...S. Alexandrov The qualitative difference in solution behavior in the vicinity of maximum friction surfaces is demonstrated for two distinct models of pressure-dependent plasticity (the double-shearing and coaxial models) using closed-form solutions for planar flow through an infinite wedge-shaped...

...G. Subhash; W. Zhang Finite element analysis of single grit rotating scratch on brittle materials was conducted using an “elastic-plastic-cracking” (EPC) model. The brittle material removal mechanism was modeled based on a critical crack-opening displacement criterion. It was found...

...Tayfun E. Tezduyar, Associate Editor; Thomas J. R. Hughes, Guest Editor 23 01 2003 finite element analysis hydrodynamics mesh generation flow simulation modelling This special collection of papers is based on some of the invited presentations at the Fifth U.S.-Japan...

...J. P. Bardet; S. Iai The emergence of two-phase instability is investigated analytically for the axisymmetric cylinders made of a pervious solid matrix with pores filled with an interstitial fluid. General analytical solutions are derived for a broad range of constitutive models...

...D. J. N. Limebeer; R. S. Sharp; S. Evangelou A study of the effects of regular road undulations on the dynamics of a cornering motorcycle is presented. This work is based on an enhanced version of the motorcycle model described in “A Motorcycle Model for Stability and Control Analysis” (R. S. Sharp...

... for publication in the ASME JOURNAL OF APPLIED MECHANICS . Manuscript received by the ASME Applied Mechanics Division, August 29, 2001; final revision, March 4, 2002. Associate Editor: D. A. Siginer. 29 August 2001 04 March 2002 16 08 2002 non-Newtonian fluids modelling...