INTRODUCTION In general, two different models are employed when addressing animal and human locomotion on a simple mechanical level: the inverted pendulum model for walking, where the body is reduced to a point mass m at the center of mass (COM) vaulting over a rigid stance leg of length l0, and the spring-mass model for running or hopping, where the rigid stance leg is substituted by a compres...

In this paper we consider a linear wave equation with strong damping and dynamical boundary conditions as an alternative model for the classical spring-mass-damper ODE. Our purpose is to compare analytically these two approaches to the same physical system. We take a functional analysis point of view based on semigroup theory, spectral perturbation analysis and dominant eigenvalues.

Soft materials are known for their plethora of biomedical applications, intricate structure–property correlation and nonlinear mechanical response. Multiple length–time scale phenomena hierarchical structure results in nonlinearity. Phenomenological continuum models have been developed to predict mechanics, which mostly very material-specific with inability the mechanics different types soft si...

This paper analyzes delamination of multilayered inhomogeneous beam structure by utilization a non-linear viscoelastic mechanical model. The time-dependent response is treated spring and dashpot connected in series to system two linear springs dashpots. model under stress that function time. constitutive law the representing dependence between stress, strain time derived. main goal obtain solut...

The viscoelastic behavior of wood pulp fibers plays a fundamental role in the performance paper and products. Wood are hierarchical composites consisting different cell wall layers have anisotropic properties. Since accessing individual is challenging, no measurement technique has been able to characterize properties both – longitudinal transverse fiber direction yet. Here, an atomic force micr...

Robots play more important roles in daily life and bring us a lot of convenience. But when people work with robots, there remain some significant differences in human-human interactions and human-robot interaction. It is our goal to make robots look even more human-like. We design a controller which can sense the force acting on any point of a robot and ensure the robot can move according to th...

3 Simulation Phase: Three Models for Simulation 9 3.1 3D ChainMail . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.2 Mass Spring Models . . . . . . . . . . . . . . . . . . . . . . . 13 3.2.1 Classical Mass Spring Model . . . . . . . . . . . . . . . 13 3.2.2 Fast Tetrahedral Mass Spring Model . . . . . . . . . . 15 3.3 Finite Element Models . . . . . . . . . . . . . . . . . . . . . . 1...

An improved mass-spring model for a dripping faucet is presented. The model is constructed based on the numerical results which we recently obtained from fluid dynamical calculations. Both the fluid dynamical calculations and the present mass-spring model exhibit a variety of complex behavior including transition to chaos in good agreement with experiments. Further, the mass-spring model reveal...