... the response and adds an extra level of complexity in modelling their hysteresis behaviour. These material phenomena and a phenomenon called strain hardening, which causes the yield stress to increase during plastic deformations, has been studied by several authors in the past and are often built on either...

... and damping behaviour appropriately. amplitude loading load reversal scale model test subsea system interaction stiffness displacement foundation dissipation geologist geology hysteresis strain amplitude relative density model test shear strain amplitude frequency engineering...

... ABSTRACT The enhanced hysteresis model is time efficient in transforming global analysis results into local stress and is capable of modelling the stress in n th order laid elements through n-gon described geometric shapes and a parameter scheme. It is thus applicable for shapes that can...

... reservoir characterization simulation reference system upstream oil & gas monopile calculation numerical simulation relative density loading hysteresis monopile foundation initial stiffness proceedings secant stiffness stiffness foundation stiffness amplitude eigenfrequency span...

... polytetrafluoroethylene (PTFE) surfaces is provided. A high static contact angle and low contact angle hysteresis for these "xPTFE" superhydrophobic surfaces were measured being around 150° and 15° respectively. The surfaces' structures were investigated via scanning electron microscopy (SEM). Otherwise, the "slip-length...

... to bending, in particular due to inter-layer sliding between helically wound layers. This complex mechanical bending performance gives rise to a moment-curvature hysteresis of the cross section, also called stick-slip hysteresis. The stick-slip hysteresis behaviour of an umbilical results in frictional...

... requires a highly computationally efficient methodology capable of incorporating detailed flexible pipe models into a global nonlinear dynamic analysis. This paper expands dynamic substructuring to include both large displacements and bending hysteresis due to armour layer stick/slip friction...

... simple structure at present. In early researches, the design data and estimation of capacity of Wells turbine were obtaiwd by the model turbine tests under steady flaw state. However, Setoguchi et al. (1998) reported the importance of unsteady flow characteristics. The hysteresis characteristic...

... hysteresis parameters for these elements. It is shown that degrading hysteretic behaviour can cause a significant increase in the variability of the displacement response time history, when compared with elasto-plastic behaviour. INTRODUCTION Offshore structures under severe dynamic excitation may undergo...

... ABSTRACT In the vibrations of conductors and cables the stiffness (both longitudinal and bending stiffness) as well as the mechanical hysteresis is of importance. The corresponding parameters are usually not readily found via analytical considerations and therefore have to be determined...

..., with their associated hysteresis for an axially preloaded spiral strand experiencing superimposed (external) uniform cyclic load perturbations, and axial or restrained bending fatigue life. Using a series of theoretical parametric studies on a large number of spiral strands with widely varying strand (and wire...

... ABSTRACT In order to predict thermal cracks in coastal concrete structures, it is necessary to have a precise grasp of the hysteresis of temperatures generated by heat of hydration. Therefore, the temperatures solved by three-dimensional finite element analysis using the Galerkin method were...

... of a previously reported orthotropic sheet concept, and provides means of estimating the wire kinematics, interwire/interlayer contact forces, the coefficients in the 2×2 stiffness matrix under coupled axial/torsional loading, and axial hysteresis in axially preloaded locked coil cables experiencing external...

... with the particular damping model and method of analysis. There are no standard methods of measuring damping properties, and choice of experimental method may significantly influence the results. hysteresis proceedings initial stiffness test result flexible pipe experiment upstream oil & gas...

.... The theoretical model takes interwire friction fully into account. The proposed simple formulations provide means of estimating bounding solutions to strand plane-section bending stiffness, (EI) eff" and hysteresis plus associated critical imposed radii of curvature for any assumed level of external hydrostatic...

... with interwire compliances calculated using established theories of frictional contact between nonspherical bodies. The final results show that due to significant levels of interwire friction, strand plane-section effective bending stiffness is a function of the imposed radii of curvature. Strand hysteresis...