Topic
Bending moment
About: Bending moment is a research topic. Over the lifetime, 14577 publications have been published within this topic receiving 158834 citations. The topic is also known as: bending moment.
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TL;DR: In this article, an experimentally validated finite element model suitable for simulating the quasi-static behavior of Dielectric Elastomer Minimum Energy Structure (DEMES) is presented.
Abstract: This paper presents an experimentally validated finite element model suitable for simulating the quasi-static behaviour of Dielectric Elastomer Minimum Energy Structure(s) (DEMES). A DEMES consists of a pre-stretched Dielectric Elastomer Actuator (DEA) adhered to a thin, flexible frame. The tension in the stretched membrane causes the frame to curl up, and when a voltage is applied, the frame returns to its initial planar state thus forming a useful bending actuator. The simulation method presented here incorporates a novel strain energy function suitable for simulating general DEA actuator elements. When compared against blocked force data from our previous work, the new model provides a good fit with an order of magnitude reduction in computational time. Furthermore, the model accurately matched experimental data on the free displacement of DEMES formed with non-equibiaxially pre-stretched VHB4905 membranes driven by 2500 V. Non-equibiaxially pre-stretching the membranes allowed control of effective frame stiffness and bending moment, this was exploited by using the model to optimise stroke at 2500 V in a hypothetical case study. Dielectric constant measurements for non-equibiaxially stretched VHB4905 are also presented.
107 citations
TL;DR: In this article, the effect of dynamic soil-structure interaction on the rotation of a wind turbine has been investigated in terms of the turbine structural displacement and also the base shear and bending moment in the tower and the foundation.
107 citations
TL;DR: In this article, it is verified that equilibrium of a rotated angle joint can be achieved if each joint moment is defined as a semitangential moment and alternative definitions for moments are studied for the purpose of resolving this problem.
Abstract: A geometric stiffness matrix for a beam element has been derived in a related paper. The derived matrix implies quasitangential behavior of bending moments and semitangential behavior of torques. Use of this element matrix in a three‐dimensional, large displacement analysis can result in an apparent lack of joint equilibrium. Alternative definitions for moments are studied for the purpose of resolving this problem. It is verified that equilibrium of a rotated angle joint can be achieved if each joint moment is defined as a semitangential moment.
106 citations
TL;DR: Graphical solutions are presented which enable the determination of vertical displacement at the centre, mid-edges and corner of the raft, and the maximum bending moment in the raft.
Abstract: The behaviour of perfectly smooth, uniformly loaded rectangular rafts of any rigidity resting on a homogeneous elastic layer which is underlain by a rough rigid base is analysed. Graphical solutions are presented which enable the determination of vertical displacement at the centre, mid-edges and corner of the raft, and the maximum bending moment in the raft. The solutions have been obtained by the finite element method with the interaction between raft and finite soil layer being incorporated through the use of surface elements. A weighting method is presented which allows an approximate isotropic modulus to be derived for a multi-layered soil permitting the solutions to be applied to multi-layered foundations. Variations in raft rigidity and length/breadth ratio and soil layer depth and Poisson's ratio can markedly effect both displacements and bending moments in raft foundations. On analyse le comportement de radiers rectangulaires parfaitement lisses, charges uniformement, de n'importe quelle rigidite...
106 citations
TL;DR: In this paper, a method for calculating the non-linear mode shapes and natural frequencies of fully clamped beams at large vibration amplitudes is presented, and results are compared with those of previous studies and of experimental measurements.
106 citations