Registered Data

[CT128]

[01137] Stability and Dispersion analysis for Rayleigh-type waves in non-local media

  • Session Date & Time : 5D (Aug.25, 15:30-17:10)
  • Type : Contributed Talk
  • Abstract : We present the non-local elastic behavior of Rayleigh-type surface waves in a layered media comprising an inhomogeneous medium and a fiber-reinforced layer. The dispersion equation is derived using an approximate asymptotic displacement solution of the governing wave equation. Using the Finite Difference Scheme, the stability conditions are determined for the equations of group velocity and phase velocity.The effects of various defining parameters on propagation are discussed and graphically depicted.
  • Classification : 74-10, 74B10, 74H05, 74H45, 74J15
  • Author(s) :
    • Manasa Bhat (Department of Mathematics, Indian Institute of Technology Indore.)
    • Santanu Manna (Department of Mathematics, Indian Institute of Technology Indore)

[00003] Reflection of plane waves in a rotating transversely isotropic thermoelastic diffusion solid half-space from impedance boundary in a fractional-order thermo-elasticity

  • Session Date & Time : 5D (Aug.25, 15:30-17:10)
  • Type : Contributed Talk
  • Abstract : The governing equations of a rotating transversely isotropic thermoelastic medium with diffusion in a fractional-order derivative thermo-elasticity are formulated. The velocity equation is obtained, which indicates the existence of four quasi plane waves. Reflection of these plane waves from a stress-free thermally insulated surface with impedance boundary is studied. The effects of anisotropy, rotation and impedance parameters on reflection coefficients are shown graphically.
  • Classification : 74-Mechanics of deformable solids
  • Author(s) :
    • Dr. Anand Kumar Yadav (Shishu Niketan Sr. Sec School Sector 22D Chandigarh, India)

[00414] Asymptotically Modelling Plastic Deformation during Cold Rolling of Sheet Metal

  • Session Date & Time : 5D (Aug.25, 15:30-17:10)
  • Type : Contributed Talk
  • Abstract : Cold rolling is a metal forming process where strip of metal passes between two rollers and comes out thinner. We present a multiple-scale asymptotic model of cold rolling. Assuming rigid perfectly-plastic material and large rolls, we explain how to rederive and go beyond existing theories. Results agree well with FE simulations, and suggest the origin of residual stress in the resulting strip. This modelling approach has potential applications in many metal forming processes.
  • Classification : 74C05, 74M10, 41A60, 35C20, 35Q74
  • Author(s) :
    • Mozhdeh Erfanian (School of Mathematics, University of Warwick)
    • Ed Brambley (School of Mathematics, University of Warwick)
    • Francis Flanagan (Department of Mathematics and Statistics, University of Limerick)
    • Doireann O'Kiely (Department of Mathematics and Statistics, University of Limerick)

[00423] Understanding elastic-plastic stress distributions during cold rolling of sheet metal

  • Session Date & Time : 5D (Aug.25, 15:30-17:10)
  • Type : Contributed Talk
  • Abstract : In cold rolling, a metal sheet is passed between two rotating rollers which reduce the thickness of the sheet. In this talk, we present our new elastic-plastic mathematical model for describing the stress distribution during cold rolling, which is an extension of some existing asymptotic models, where elastic effects are neglected. At leading order, our model returns the popular slab-type analysis, but at higher orders, through-thickness variations can be predicted accurately.
  • Classification : 74C05, 74M10, 41A60, 35C20, 35Q74
  • Author(s) :
    • Francis Flanagan (Department of Mathematics and Statistics, University of Limerick)
    • Doireann O'Kiely (Department of Mathematics and Statistics, University of Limerick)
    • Alison O'Connor (School of Engineering, Bernal Institute, University of Limerick)
    • Mozhdeh Erfanian (School of Mathematics, University of Warwick)
    • Ed Brambley (School of Mathematics, University of Warwick)

[00531] Calibration of hardening parameters for the absence of hysteresis test-data

  • Session Date & Time : 5D (Aug.25, 15:30-17:10)
  • Type : Contributed Talk
  • Abstract : A mathematical model is developed to estimate combined nonlinear isotropic-kinematic hardening parameters of ductile materials using Ramberg-Osgood constants for monotonic and cyclic stress-strain curves. This compact model can be performed even if the hysteresis curves test results are unavailable for the specimens subjected to high amplitude cyclic loading. The model is applied for AW6082 and HX220-BD, Finite Element simulation results are compared with test results, and very good agreements are obtained.
  • Classification : 74C15, 74-10
  • Author(s) :
    • Eray Arslan (TU Wien)
    • Milan Zigo (MAGNA STEYR Fahrzeugtechnik GmbH & Co KG)