Abstract Lateral loading of the pelvis occurs for both vehicle occupants struck during side impacts as well pedestrians. This research investigated load distribution through anterior (i.e. pubic symphysis) and posterior sacrum) aspects acetabular iliac loading. Sixteen male post-mortem human surrogate pelves were tested in quasi-static (n = 4) anddynamic 12) conditions. On basis finite element model simulations a pedestrian being at 40 km/hr, velocity profile dynamic tests was prescribed...

The paper presents a comparative study among three methods which allow to estimate induction machines performance through finite element analysis. first two approaches evaluate the by means of non-linear circuital approach whose parameters are calculated specific set simulations. Those strategies differ each other on calculations performed for determination. third method is based voltage fed time step simulations carried out different operating points. Being latter most accurate, it...

The classic single-phase equivalent circuit is used to predict the steady-state operation of symmetrical induction machines under balanced sinusoidal supply. Its scope can be extended by considering variable parameters depending on main influencing quantities, thus allowing account also for secondary phenomena affecting machine operation, such as magnetic saturation and skin effect. This paper presents a contextual identification method using analytical elaborations one standstill...

In the framework of Reissner–Simo rod theory and following Haringx’ approach for studying axial buckling in shear deformable rods, we give a mechanical interpretation tensile instability, together with its mathematical justification, perform linearized eigenvalue analysis tense planar rods. Buckled shapes critical loads are calculated most usual boundary conditions.

We perform an asymptotic static analysis on a simple two degrees of freedom structure, made up highly stiff bar and springs, which shows different linear behaviours finite stiffness depending the magnitude applied force. Both regimes as well non-linear transition between them occur in framework small forces displacements. The problem gives physical insight to relations linearity displacement hypothesis it is suitable for first course students with basic skills structural or rational mechanics.

En Italia, convertirse en farmacéutico requiere completar un programa universitario de cinco años, aprobar examen habilitación y registrarse el Ordine Provinciale dei Farmacisti (Colegio Farmacéuticos Provincial). El título doctor farmacia o química farmacéutica se otorga al obtener la licenciatura, mientras que estatal habilita para ejercer profesión. tiene responsabilidad mantener registro los farmacéuticos supervisar ética profesional. La distribución las farmacias está regulada por...

In this paper, we analyze the effects of twisting adouble loop torsional antenna. Its performance has been evaluated as a function twist angle around symmetry axis from 0 to 225 degrees. Two geometric conditions are considered: in one case height antenna is kept fixed. other, varied so that spherical shape conserved. The results compared with those corresponding finite element simulations. Increased Return Loss, increased bandwidth and decreasing frequency resonance obtained respect untwisted case.

Starting from constrained three‐dimensional Cosserat elasticity and in a total Lagrangian framework, we derive discuss hierarchy of static non‐linear micropolar shell models which the thickness can stretch, independence micro‐rotation on macro‐rotation is not limited to drilling degree freedom as classical six‐parameter theory. If stretch considered, unconstrained quaternions allow singularity‐free, non redundant rational parametrization strain measures. Emphasis placed discussion...

Railway systems are an important means of transportation for both people and goods. Their safety, reliability, efficiency effectiveness is pursued by mandatory technical standards concerning design criteria test procedures. One the most European to be fulfilled EN 50553 Running Capability in case fire on board rolling stock. aspects that could have verified according this standard consists capability trains continue providing minimum performance levels a amount time even when parts...

We propose an alternative formula for solving the biquadratic equation x4+bx2+c=0, which is more convenient than classical one whenever c a perfect square. The method suitable to be introduced high school students together with standard approach of substitution y=x2. A classroom and applicative example are given.