Shear stresses in honeycomb sandwich plates: Analytical solution, finite element method and experimental verification

Wahl, Laurent; Maas, Stefan; Waldmann, Danièle; Zürbes, Arno; Frères, Patrick

doi:10.1177/1099636212444655

Cited by 69 publications

(40 citation statements)

References 7 publications

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“…On the other hand, the honeycomb strategy (Fig. 2D), has also shown good results in term of mechanical properties [24]. For this reason, both infill patterns have been chosen for this paper.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Fatigue performance of fused filament fabrication PLA specimens

et al. 2018

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This paper aims to analyze the fatigue response of PLA parts manufactured through fused filament fabrication (FFF). The influence of four factors (layer height, fill density, nozzle diameter and velocity) on the fatigue performance of cylindrical specimens is studied through an L27 Taguchi experimental design. This design is run for two different infills: linear and honeycomb. Specimens have been tested on a rotating fatigue bending machine. The optimal set of parameters and levels resulting in the highest number of cycles to failure have been determined, and implemented to manufacture a second set of specimens, which have been tested at different stress levels to represent the Wöhler curve. Fill density proves to be the most influential parameter on fatigue life, followed by layer height. The tests undertaken to represent the Wöhler curve revealed that 35.8 MPa can be considered as a lower threshold of the endurance limit for this kind of specimens. This value can be useful to use these devices to manufacture human implants, as PLA is a biocompatible material. The main novelty of this paper is that no previous fatigue life assessment of PLA parts manufactured through FFF has been developed.

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Section: Accepted Manuscriptmentioning

confidence: 99%

Fatigue performance of fused filament fabrication PLA specimens

et al. 2018

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“…Since ABS is much denser than EPP foam (a typical material for aircraft of this size), minimizing weight was a dominant design factor for the baseline design. The internal structure of the wing section was designed as a honeycomb fill to provide a high amount of bending and torsional stiffness while still keeping the weight low [12]. The baseline CAD model is depicted in Figure 8.…”

Section: Baseline Cad Modelmentioning

confidence: 99%

A Framework for Integrated Analysis, Design, and Rapid Prototyping of Small Unmanned Airplanes

Locascio

Ramee

Schaus

et al. 2016

16th AIAA Aviation Technology, Integration, and Operations Conference

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A vital requirement of the modern combat environment is to gain and maintain situational awareness to facilitate effective squad-level decision making. This paper presents a part of the research undertaken by Georgia Institute of Technology (Georgia Tech) in collaboration with the Army Research Laboratory (ARL) in developing design capabilities for small unmanned aerial systems (sUAS). As part of this effort the team developed a toolset capable of creating mission-specific fixed wing aircraft assets that can be rapidly tailored and manufactured at a forward operating base. The toolset includes a physics-based analysis model to generate feasible aircraft designs from a family of designs, a decision making tool to select the optimal design for a mission, and a parametric CAD model. The CAD model accepts sizing parameters from the design algorithm and uses them to scale baseline part files, which can then be used to rapidly manufacture vehicle parts. Several sets of mission requirements were chosen, leading to unique fixed wing aircraft designs which were manufactured and flown. The process described herein can be used to develop and fabricate small unmanned airplane designs to fulfill rapidly changing squad-level mission-specific operational needs, but can also be applied to other vehicle architectures.

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“…The honeycomb structure has high stiffness and strength relative to its weight [39]. The honeycomb-like structure of Spc42p presumably provides SPB the stability and rigidity essential for resisting the pulling and pushing forces during cell division and nuclear migration, and a strong internal scaffold for assembly of other SPB components.…”

Section: Assembly Of Sheets By Over-expression Of Spc42pmentioning

confidence: 99%

Assembly of Yeast Spindle Pole Body and its Components Revealed by Electron Cryo-Tomography

Li¹,

Fernández²

2018

Preprint

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Spindle pole body (SPB) is the microtubule organizing center (MTOC) in yeast. It plays essential roles during many cellular processes, ranging from mitosis to karyogamy. Here, we used electron cryo-tomography (cryo-ET) and image processing to study SPB and its component purified from the budding yeast. The 3D images and models of SPB at various cell cycle stages were reconstructed by cryo-ET and were analyzed. The results reveal SPB as a cylindrical shaped structure composed of multiple layers. The central layers are arranged with a degree of crystalline order. By using subtomogram averaging methods, we studied the purified "sheet" from over-expressed Spc42p. Our analysis of the SPBs and its components provides new insights into the assembly of this organelle and its cellular function as an MTOC.

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Shear stresses in honeycomb sandwich plates: Analytical solution, finite element method and experimental verification

Cited by 69 publications

References 7 publications

Fatigue performance of fused filament fabrication PLA specimens

Fatigue performance of fused filament fabrication PLA specimens

A Framework for Integrated Analysis, Design, and Rapid Prototyping of Small Unmanned Airplanes

Assembly of Yeast Spindle Pole Body and its Components Revealed by Electron Cryo-Tomography

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