Evaluation of tension-compression and tension-tension fatigue life of woven fabric glass/epoxy laminate composites used in railway vehicle

Jeon, Kwang-Woo; Shin, Kwang-Bok; Kim, Jung-Seok

doi:10.1007/s12541-011-0108-6

Cited by 13 publications

(3 citation statements)

References 12 publications

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“…Bogie frames are generally comprised of metallic materials, including SM490A steel or high strength steel [1]. However, recently, fiber-reinforced composites have been used to reduce the structural weight of the bogie [2][3][4][5][6]. This decreased weight reduces the amount of energy that is required to run the vehicle.…”

Section: Introductionmentioning

confidence: 99%

Distributed Strain Monitoring of Railway Composite Bogies Using a Brillouin Optical Correlation Domain Analysis System

et al. 2018

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The structural deformation of a bogie frame manufactured using a composite material was monitored in real time using a distributed optical fiber sensor. The bogie frame contained an internally embedded standard single-mode optical fiber. Performance tests were conducted by applying a vertical load to the middle of the side beams on each side of the composite bogie frame. The strain distribution was monitored using an optical fiber sensor. A distributed optical fiber sensor system based on the Brillouin optical correlation domain analysis (BOCDA) technique with a 3 cm spatial resolution was used. The distributed strain measured using the optical fiber correlated well with the finite element (FE) analysis data, confirming that the composite bogie frame was fabricated as designed. For a vertical load of 182 kN, the maximum strain, which occurred in the middle of the side frame, increased by 1.3 times, as compared with a vertical load of 140 kN. The experiment was able to verify the balance and the structural stability of the left- and right-hand-side beams. Furthermore, it could confirm that there was a concentrated load where the side beam and the crossbeam meet, owing to a mismatch during the assembly of the composite bogie frame.

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Section: Introductionmentioning

confidence: 99%

Distributed Strain Monitoring of Railway Composite Bogies Using a Brillouin Optical Correlation Domain Analysis System

et al. 2018

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“…In particular, the fatigue life evaluation method for multiaxial load has not been defined. Therefore, a number of detailed studies on the fatigue life evaluation of bogie frames have been conducted [1,10,11]. However, there have been few studies on the fatigue life evaluation method and the characteristics of the stress history that occur in the fatigue test and the track test.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Design Evaluation of Railway Bogie with Full-Scale Fatigue Test

Seo

Hur

Jun

et al. 2017

Advances in Materials Science and Engineering

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The bogie frame of a railway is an important structural member for the support of vehicle loading. In general, more than 25 years’ durability is necessary. Much study has been carried out in experimental and theoretical domains on the prediction of the structural integrity of the bogie frame. The objective of this paper is to estimate the structural integrity of the bogie frame of an electric railcar. Strength analysis has been performed by finite element analysis. From this analysis, stress concentration areas were investigated. To evaluate the loading conditions, dynamic stress was measured by strain gauge. It has been found that the stress and strain due to the applied loads were multiaxial conditions according to the location of the strain gauge. Fatigue strength evaluations of the bogie frame were performed to investigate the effect of a multiaxial load through the employment of a critical plane approach.

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“…Also, they are useful for the cost reduction of composites, which may be achieved by incorporating laminates of low-cost but high performance fibers in designing hybrid laminates without a significant reduction of the mechanical properties [4]. Hybrid laminates reinforced with glass and carbon fibers have indeed been found to be useful in practice, especially in automotive and aerospace industries [5][6][7]. An early use of both carbon and glass fibers is traced back to the Ford GT40 racing car body and structural skin of the rotor blades in the Aerospatiale SA360 helicopter [8].…”

Section: Introductionmentioning

confidence: 99%

Tensile strength of notched carbon/glass/epoxy hybrid composite laminates before and after fatigue loading

Haery

Kim

Zahari

et al. 2013

Journal of Industrial Textiles

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Hybrid laminates consisting of C-glass woven fabric/epoxy composite plies and 3k-carbon woven fabric/epoxy composite plies are studied for fatigue damage and residual strength. Tension-tension fatigue tests were conducted on notched composite laminates at two load ratios of 0.1 and 0.25. The laminates were fabricated with the hand lay-up process for a symmetrical stacking sequence [0/90] 3s made of three 3k-carbon/epoxy composite plies at both top and bottom sections and six C-glass/ epoxy composite plies in the middle. Fatigue damage was generated on notched specimens with 4 Â 10 4 load cycles to damage for residual strength tests. The hybridization was found to be beneficial for relative damage sensitivity under one of four different fatigue conditions although its effect was marginal while three other conditions were not in favor. A relative damage sensitivity factor expression (or a criterion) was developed for quantitative comparisons between non-hybrid and hybrid composites and was theoretically demonstrated to be valid for any possible cases where various combinations are possible due to differences in strength reduction rate between two different composite systems. A theoretical framework with the relative damage sensitivity factor is proposed as a guide to deal with the complexity involving uncertainties and a large number of variables in the hybrid composite system. New damage mechanisms of the hybrid system due to dissimilarity between two sub-composite systems (i.e. glass/epoxy and carbon/epoxy) were hypothesized and tested to be valid with evidence based on

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Evaluation of tension-compression and tension-tension fatigue life of woven fabric glass/epoxy laminate composites used in railway vehicle

Cited by 13 publications

References 12 publications

Distributed Strain Monitoring of Railway Composite Bogies Using a Brillouin Optical Correlation Domain Analysis System

Distributed Strain Monitoring of Railway Composite Bogies Using a Brillouin Optical Correlation Domain Analysis System

Fatigue Design Evaluation of Railway Bogie with Full-Scale Fatigue Test

Tensile strength of notched carbon/glass/epoxy hybrid composite laminates before and after fatigue loading

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