Impact Energy Absorption of Continuous Fiber Composite Tubes

Schmueser, David; Wickliffe, L. E.

doi:10.1115/1.3225937

Cited by 101 publications

(39 citation statements)

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“…The solid line in each gure is the actual crush load versus crush length relation, while the broken line represents the crush load averaged with respect to the crush length, as described by Eq. (2). Note that the scale of the horizontal axes is different for the static and dynamic traces.…”

Section: Crush Modesmentioning

confidence: 99%

Static and Dynamic Energy-Absorption Capacity of Graphite-Epoxy Tubular Specimens

Schultz¹,

Hyer²,

Fuchs³

2001

Mechanics of Composite Materials and Structures

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This article examines the energy-absorption capacity of 50k and 12k carbon ber composite tubular specimens crushed axially, in both quasi-static and dynamic fashions. Round and square tubular specimens with §45 ± and §45 ± = 0 ± ber orientation schemes were studied. The fundamental issue was to compare the energy-absorption capacity of the lower-cost 50k material with the 12k material, and to examine the in uence of specimen geometry, ber orientation schemes, and dynamic effects on the energyabsorption characteristics. Specimens made from the 50k material absorbed less energy than similar specimens made with the 12k material, and the load ratios were generally higher for the 50k specimens. The square specimens tended to have lower values of speci c energy absorption (SEA) than the circular specimens. In addition, the crush modes were somewhat different and the load ratios were generally higher for the square specimens than for the circular specimens. Changing the ber orientation schemes did not have much of an effect on the SEA, nor on the crush modes, but the presence of 0 ± bers led to higher load ratios for the 50k specimens. The specimens tested dynamically had lower SEAs and higher load ratios than similar specimens that were tested statically.While there already exists a signi cant body of literature regarding the energy-absorption capabilities of ber-reinforced composite materials [1 -14], new material developments and manufacturing schemes require continuing investigation of the problem. Though previous studies have concluded that graphite-reinforced materials often absorb energy better than glass-or Kevlar-reinforced materials, the cost of graphite is considerably higher. However, carbon ber that is lower in cost than traditional aerospace-grade carbon ber is

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Section: Crush Modesmentioning

confidence: 99%

Static and Dynamic Energy-Absorption Capacity of Graphite-Epoxy Tubular Specimens

Schultz¹,

Hyer²,

Fuchs³

2001

Mechanics of Composite Materials and Structures

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“…At the outset, a literature survey of experimentally determined specific energy absorption (SEA) is given for various materials and devices [3,[5][6][7][8][9][10][11][12][13][14][15]. In ordered to compare various materials for specific energy absorption a circular tube geometry was chosen.…”

Section: Energy Absorbing Devicesmentioning

confidence: 99%

“…For glass/epoxy, Kevlar/epoxy and graphite/epoxy composite tubes the SEA values can vary greatly when the layup angle is varied [6]. The composite tubes used in Ref.…”

Section: Energy Absorbing Devicesmentioning

confidence: 99%

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An Assessment of Add-on Energy Absorbing Devices for Vehicle Crashworthiness

Lin

Mase

1990

Journal of Engineering Materials and Technology

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An alternative approach to vehicle crashworthiness improvement by inserting addon nonstructural energy absorbing (EA) devices in the unutilized space in series with existing load paths is studied conceptually. Vehicle-barrier impact simulations are conducted to determine the energy absorption and crushable space requirements for the add-on devices. Based on the experimental data available in the literature, a number of materials are identified as being capable of meeting these requirements. Simple tubes and honeycombs in axial crushing mode are found to be more effective as add-on EA devices than complex devices such as inversion tubes. Foam filling of primary structural members in bending mode is found to be less effective in increasing energy absorbing capacity than add-on EA devices. While the study indicates a theoretical assessment of these devices, physical limitations may inhibit their usefullness. In particular, many of the devices are highly directional in nature.

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“…Many authors report that the load velocity influences the EA value, however some of them state that EA drops along with the growth of velocity [1][2][3], and other works show that EA increases [4][5][6]. In most reviewed cases loading rate does not influence the EA at all [5,[7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Heat effects measurements in process of dynamic crash of polymer composites

Ochelski¹,

Bogusz²,

Kiczko³

2012

Bulletin of the Polish Academy of Sciences: Technical Sciences

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Abstract. In the work, the attempt to determine the influence of loading rate on temperature of the surface of the crushed composite energy absorbing elements was undertaken. The specimens made of epoxy composites reinforced with glass fabrics and carbon fabrics of the structures [(0/90)T ]n were subjected to dynamic investigations. Thermovision investigations were conducted during energy absorbing tests. A thermovision camera enables the measurement of the temperature on the whole surface of the specimen visible in the camera lens while the measurement with the use of thermocouple is only local and has great heat inertia. During the investigations, the increase of specimen temperature related to impact velocity occurs. The temperature increase is caused by friction between the particles of the crushed specimen and by friction between the specimen and the support of the strength machine. At high loading rates, the increase of temperature on the surface of the specimens was significantly greater than the softening temperature of the epoxy resin E-53.

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Impact Energy Absorption of Continuous Fiber Composite Tubes

Cited by 101 publications

References 0 publications

Static and Dynamic Energy-Absorption Capacity of Graphite-Epoxy Tubular Specimens

Static and Dynamic Energy-Absorption Capacity of Graphite-Epoxy Tubular Specimens

An Assessment of Add-on Energy Absorbing Devices for Vehicle Crashworthiness

Heat effects measurements in process of dynamic crash of polymer composites

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