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Wind Energy Harvesting System
Published in Yen Kheng Tan, Energy Harvesting Autonomous Sensor Systems, 2017
This bending moment is equal to the applied moment at each point in the beam (which depends on the applied force and its distance from the specific point). The geometric moment of inertia I, which describes the effect of the rectangular shape of the beam cross section, is given as [77] () I=∫az2dz () I=a[z33]−t2t2=at312
Design of Composite Structures
Published in Manoj Kumar Buragohain, Composite Structures, 2017
A beam is a slender structural element subjected to lateral loads. The various types of composite beams in common use are Solid cross sections Rectangular (plies normal to the loading direction)Rectangular (plies parallel to the loading direction)Thin-walled cross sections Open ended, for example, T-section, I-sectionClosed ended, for example, box-sectionSandwich beam
Shear Stresses
Published in Ken Wyatt, Richard Hough, Principles of Structure, 2013
Such beams often have hexagonal holes from the manufacturing process, and are called castellated beams. If we imagine the holes to be quite large and triangular, we have a truss, as in Figure 10.7. In fact, a truss behaves very similarly to a beam, with the upper and lower members (the chords) providing most of the bending resistance (like flanges) and the web members providing the shear resistance. The stresses in the chords (like flanges) are large at midspan and small at the ends. The stresses in the web members (like shear stresses in a web) are small at midspan and large at the ends. The advantage of a truss is that we do not need to use the same section throughout the whole length, but can use heavier chords and web members where the internal forces are larger.
Development of a numerical approach for the prediction of thrust generated by a bio-mimetic propulsion system
Published in Ships and Offshore Structures, 2019
Ganesh Govindarajan, R. Sharma, P. Ananthakrishnan
As shown in Figure 1, we consider a flexible beam in the form of a fish, which perform undulatory locomotion generate a wave of bending that passes from head to tail. The patterns of beam bending can vary in the number of waves, in the form of the amplitude change of the wave along the beam. A beam is a structural element that primarily resists loads applied laterally to the beam’s axis, its mode of deflection is primarily by bending and the effect of all the forces acting on the beam is to produce shear forces and bending moments within the beam. These in turn induce internal stresses, strains and deflections of the beam.
Influence of infill properties on flexural rigidity of 3D-printed structural members
Published in Virtual and Physical Prototyping, 2019
J. H. Porter, T. M. Cain, S. L. Fox, P. S. Harvey
The maximum deflection of the centre of a simply-supported beam under a mid-span point load F is given bywhere is the span length of the beam. The maximum deflection depends on the flexural rigidity EI of the beam, but not mass per unit length, m, because the load F is applied (quasi-)statically.