Fatigue design of welded bicycle frames using a multiaxial criterion

Callens, Alexandre; Bignonnet, A.

doi:10.1016/j.proeng.2012.04.109

Cited by 18 publications

(14 citation statements)

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“…Finally, it results in a fatigue fracture. In practise, the frames of the means of transport are most frequently stressed by a combination of bending and torsion forces [ 1 , 26 , 27 , 28 , 29 ]. Therefore, the authors’ effort is aimed at detecting the fatigue life result of the used material only from this load.…”

Section: Introductionmentioning

confidence: 99%

Experimental Determination of the Manson−Coffin Curves for an Original Unconventional Vehicle Frame

et al. 2020

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This article is divided into two parts—in the first part, authors inform about their testing device that enables the acquisition of results from uniaxial and multiaxial fatigue tests (the bending−torsion combination). We present the approaches used during designing and building the testing device. The direct implementation of the research in the second part will concentrate on implementing the acquired results for the frame design of a vehicle worked out by the authors. The three-wheeled vehicle has the front steered wheel suspended in an unconventional way. This original design can cause an increased load on the vehicle’s frame. This can be apparent mainly during driving through curves. Therefore, the fatigue curves of the tested material (EN AW 6063) will be implemented from the point of view of its usability in operation. A vehicle frame is most often loaded by bending and torsion. The authors assess the influence of welding on the fatigue life of this unique unconventional vehicle by determining the fatigue curves of the material for its production. The stresses achieved on the test specimens fully correspond to the load of the frame (in welds) during its operation.

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Section: Introductionmentioning

confidence: 99%

Experimental Determination of the Manson−Coffin Curves for an Original Unconventional Vehicle Frame

et al. 2020

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“…To build bicycle to work in daily culture is not easy. An electric vehicle for transportation is the best invention to accelerated transition from motor bike culture to become bicycle to work culture.Electric bicycles and motorcycles have emerged as a possible way of improving the transportation system sustainability [1].…”

Section: Introductionmentioning

confidence: 99%

Finite element analysis of electric bicycle frame geometries

Cahyono¹,

Anwar²,

Diharjo³

et al. 2017

AIP Conference Proceedings

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The effect of load and thickness variation on stress analysis of monocoque frame of electric city car using FEM AIP Conference Proceedings 1788, 030077 (2017) Abstract. This paper presents a simulation Finite Element Analysis (FEA) model of electric trike frames. The model of electric trike frame is a standard bicycle frame with addition modification on the back side for battery pack component and passenger loads. The electric motor is driven to put in front wheel for easy maintenance. Due to gain maximum safety in the passenger area and easy assembling, the frame is manufactured by circular steel tube in the front side and square steel tube in the back side. FEA simulation has been investigating proper model based on steel tube profile. The profiles is circular and oval steel tube 1.65mm thickness, (1, 1 ½, and 1 ½) inch diameter in front and square steel tube 2 mm thickness, (30x30, 40x40 and 50x50) mm size in the back. The support tube of the electric bicycle frame is similar to the National Standard road bicycle (SNI).The validation of this simulation is using experiment method and adaption method for optimizing iteration time and accuracy. The result of the simulation is a factor of safety. Von misses stress distribution from simulation result is showed the critical are in joining tube under driver of the frame structure. The oval tube is reached safety factor better than the circular tube, and it's had a better performance against the vertical load. The best variable is variable 3 oval tube 56.6x40 mm diagonal size with 1.65 thickness. It maximum passenger load is 700Kg. It can be a recommendation to redesign future frame of the electric bicycle.

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“…This 'safe region' is then identified by a fatigue boundary definition. An example of such a definition is the Dang Van criterion [16][17][18][19]. However, to obtain a fatigue lifetime estimate four steps have to be undertaken.…”

Section: Fatigue Analysis;mentioning

confidence: 99%

Comparative study of multiaxial fatigue methods applied to welded joints in marine structures

Lieshout¹,

Besten²,

Kaminski³

2016

Frattura Ed Integrità Strutturale

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ABSTRACT. Marine structures are particularly prone to action of waves, winds and currents with stochastically varying composition, intensities and directions. Therefore, resultant stresses may cause multiaxial fatigue in specific welded structural details. For the assessment of multiaxial fatigue in welded joints, a wide variety of methods have been suggested. However, there is still no consensus on a method which can correctly account for non-proportional and variable amplitude loading. This paper beholds a comparative study of multiaxial fatigue methods applicable for design of marine structures. For the purpose of comparison several load cases were defined including non-proportional and variable amplitude loadings with different normal and shear stress amplitude ratios. Three types of methods are compared: those described by three different codes (i.e. Eurocode 3, IIW and DNV-GL), those described by three different multiaxial fatigue approaches from literature (i.e. Modified Carpinteri-Spagnoli Criterion, Modified Wohler Curve Method and Effective Equivalent Stress Hypothesis) and an approach based on Path-Dependent-Maximum-Range multiaxial cycle counting. From this study it has been concluded that non-proportional variable amplitude loading has a significant negative impact on the fatigue lifetime estimates, and that further research and experimental testing are essential to come to a consensus.

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Fatigue design of welded bicycle frames using a multiaxial criterion

Cited by 18 publications

References 1 publication

Experimental Determination of the Manson−Coffin Curves for an Original Unconventional Vehicle Frame

Experimental Determination of the Manson−Coffin Curves for an Original Unconventional Vehicle Frame

Finite element analysis of electric bicycle frame geometries

Comparative study of multiaxial fatigue methods applied to welded joints in marine structures

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