To understand the mechanical behavior of fast-starting fish, we modeled the pumpkinseed sunfish, Lepomis gibbosus, as a longitudinally-loaded beam that behaves as an elastic column eccentrically-loaded by lateral musculature. Since bending moments are a function of the shape of the body, we used real sunfish to determine, (1) from cross-sections, the effective moment arm of the lateral musculat...

The vertebral column has evolved to accommodate the broad range of locomotor pressures found across vertebrate lineages. Xenarthran (armadillos, sloths and anteaters) vertebral columns are characterized by xenarthrous articulations, novel intervertebral articulations located in the posterior trunk that are hypothesized to stiffen the vertebral column to facilitate digging. To determine the degr...

A non-linear theory is presented for stretching and inplane-bending of isotropic beams which have constant initial curvature and lie in their plane of symmetry. For the kinematics, the geometrically exact one-dimensional (1-D) measures of deformation are specialized for small strain. The 1-D constitutive law is developed in terms of these measures via an asymptotically correct dimensional reduc...

This paper presents exact solutions for the nonlinear bending problem, buckling loads, and postbuckling configurations of a perfect an imperfect bioinspired helicoidal composite beam with linear rotation angle. The is embedded on elastic medium, which modeled by two foundation parameters. integro-differential governing equation system derived based Euler–Bernoulli hypothesis, von Kármán strain,...

Abstract The aim of this work is to study the stress distributions and location hot spots in vicinity intersection lines tubular elements TY-joints. Using finite element models, we analyze effects geometrical parameters on concentration factor case in-plane bending out-of-plane loads, around weld toe joints. Our results reveal maximum at heel or loads saddle point loads. Six parametric equation...

Our goal is to evaluate skeletal anabolic response to mechanical loading in different age groups of C57B1/6J (B6) and C3H/HeJ (C3H) mice with variable loads using bone size, bone mineral density (BMD), and gene expression changes as end points. Loads of 6-9 N were applied at 2 Hz for 36 cycles for 12 days on the tibia of 10-wk-old female B6 and C3H mice. Effects of a 9-N load on 10-, 16-, and 3...

Salamanders are often used as representatives of the basal tetrapod body plan in functional studies, but little is known about the loads experienced by their limb bones during locomotion. Although salamanders' slow walking speeds might lead to low locomotor forces and limb bone stresses similar to those of non-avian reptiles, their highly sprawled posture combined with relatively small limb bon...

STUDY DESIGN Twelve Cadisc-L devices were subjected to flexion (0°-6°) and extension (0° to -3°) motions at compressive loads between 500 N and 2000 N at a flexural rate between 0.25°/s and 3.0°/s. OBJECTIVE To quantify the change in flexural properties of the Cadisc-L (elastomeric device), when subjected to increasing magnitudes of axial load and at different flexural rates. SUMMARY OF BAC...

Alloy wheels in the motor cycle play major role to carry load over spoke wheels. The shape and orientation of spokes are responsible for withstand loads which acting on alloy wheel rim hub bearing surface. These subjected different types i.e., radial loads, impact load, bending torsion maximum deflection load. So it is necessary study response under these before product going into market. In pr...

OBJECTIVE To compare the mechanical stability of a fixed-angle blade plate with that of a locking plate in a cadaveric proximal humerus fracture-fixation model subjected to cyclic loading. A secondary objective was to evaluate whether the use of synthetic humerus specimens would replicate significant differences found during cadaveric tests. DESIGN Mechanical evaluation of constructs in bendi...