Topic
Deflection (engineering)
About: Deflection (engineering) is a research topic. Over the lifetime, 30862 publications have been published within this topic receiving 298849 citations.
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TL;DR: In this paper, the authors derived the partial differential equation of motion for the transverse deflection of a rotating pre-twisted plate by considering it as a plate of an equivalent rectangular cross-section subjected to a quasi-static load due to a centrifugal force field.
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
TL;DR: In this paper, the authors presented the results of a combined theoretical and experimental investigation of local bending effects in a clamped circular foam-cored sandwich plate subjected to a central point load, where the basic approach is to consider the deflection of the loaded face as being governed by a two-parameter elastic foundation model.
106 citations
TL;DR: This paper presents thoracic response corridors developed using fifteen post-mortem human subjects subjected to single and double diagonal belt, distributed, and hub loading on the anterior thorax, believed to be the first study to quantify the force-deflection response of the same thorax to different loading conditions using dynamic, non-impact, restraint-like loading.
Abstract: This paper presents thoracic response corridors developed using fifteen post-mortem human subjects (PMHS) subjected to single and double diagonal belt, distributed, and hub loading on the anterior thorax. We believe this is the first study to quantify the force-deflection response of the same thorax to different loading conditions using dynamic, non-impact, restraint-like loading. Subjects were positioned supine on a table and a hydraulic master-slave cylinder arrangement was used with a high-speed materials testing machine to provide controlled chest deflection at a rate similar to that experienced by restrained PMHS in a 48-km/h sled test. All loading conditions were tested at a nominally non-injurious level initially. When the battery of non-injurious tests was completed, a single loading condition was used for a final, injurious test (nominal 40% chest deflection). To minimize the influence of repeated testing, all subjects were preconditioned prior to each loading condition using 10 cycles of a 1-Hz sine wave, and the order in which the loading conditions were tested was varied across subjects. Thoracic response was characterized using the deflection at the midline of the sternum and a load cell mounted between the subject and the loading table. Responses were defined by cross-plotting the mid-sternal deflection (normalized to 50(th) male) and the posterior force (scaled to a 45-year-old, 50(th) male based on size and modulus) and then forming a +/-1-standard-deviation corridor that considered the variance in both force and deflection. Corridors were developed to a deflection level of 20% of the 50(th) percentile male's external chest depth. The distributed loading condition generated the stiffest response (3.33 kN at 4.6 cm), followed by the double diagonal belt condition (3.18 kN at 4.6 cm), the single diagonal belt (2.28 kN at 4.6 cm) and the hub (1.14 kN at 4.6 cm).
106 citations
TL;DR: In this paper, an improved analytical model for estimating kinematic pile bending moments at an interface between two thick soil layers under dynamic SH-wave excitation is presented. And a simplified analysis procedure to be used for designing piles against Kinematic loading is proposed.
106 citations