Investigations on specimen design and mounting for Split Hopkinson Tension Bar (SHTB) experiments

Paul, Hanna; Ganzenmüller, Georg; May, Michaël; Höfemann, Matthias; Otto, Manuel; Petrinic, Nikica

doi:10.1051/epjconf/20159401049

Cited by 19 publications

(17 citation statements)

References 6 publications

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“…The double-shouldered dog-bone specimens with the gauge length of 10 mm are prepared by taking into account for the gripping force. The specimens are prepared to mount on to the slotted grips, as suggested in the method described in the work from Lefford N. et al [9], and the applied force transfers to specimens through the tapered sections of the specimens. The damping materials, copper (3M™ 1194) and acrylic tape (3M™ 4910 VHB) were placed at the contact surface between the cone and the sleeve so that the hard metal-to-metal contact can be softened.…”

Section: Methodsmentioning

confidence: 99%

“…As a result, a threaded grip mechanism is implemented to reduce the weight of the grip system as shown in Figure 2a. The reduction of the grip weight using a threaded grip system can also be found in [9][10][11] to minimise the inertial effect on force measurements, which results in increasing the test system's natural frequency. Furthermore, a plain bearing as shown in Figure 2b is inserted in the slack adaptor to improve an axial alignment (as a lateral constraint) between the loading direction and the specimen.…”

Section: Slack Adaptormentioning

confidence: 99%

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An Improved Load Introduction Technique for Dynamic Material Characterisation at Intermediate Strain Rate

Yoo

Schueler

Brodbeck

et al. 2018

The 18th International Conference on Experimental Mechanics

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Dynamic properties at intermediate strain rate are inherently difficult due to the dynamic interactions between the test specimen and the test machine. These effects obscure the interpretation of test results and therefore can make the derivation of the material properties difficult and unprecise. Soft materials can be used within load introduction devices to mitigate the inertia effect that typically occurs in dynamic tests. In this paper, dynamic tensile tests were performed within the strain rate range of 0.1 s −1 to 400 s −1 on high strength steels. With the aim of evaluating the performance of damping materials in the slack adaptor, copper and acrylic tapes were used. Experimental results show that both damping materials may be used to effectively reduce the oscillations in the measured force signal. The outcome of this project will provide the test procedure for dynamic testing at intermediate strain rates, which can produce reliable test results for materials with low failure to strain.

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Section: Methodsmentioning

confidence: 99%

Section: Slack Adaptormentioning

confidence: 99%

An Improved Load Introduction Technique for Dynamic Material Characterisation at Intermediate Strain Rate

Yoo

Schueler

Brodbeck

et al. 2018

The 18th International Conference on Experimental Mechanics

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“…Upon impact, the spreading of the pulse allows the specimen to deform plastically, under dynamic stress. [94][95][96][97] This tensile pulse, also called loading pulse, is registered by strain gages I and II, placed onto both the incident and transmission bars, and the recorded signals are used to determine the strain rate, as well as the engineering strain and stress, via Equations ( 8)- (10). Dog boneshaped specimens (Figure 9(B)) allow the samples to be slightly pretensioned in the loading direction prior to the start of the test.…”

Section: Kolsky Bar In Tension Modementioning

confidence: 99%

High‐strain‐rate mechanical performance of particle‐ and fiber‐reinforced polymer composites measured with split Hopkinson bar: A review

2021

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Reinforcing polymers with particles and fibers has been a common strategy for decades, in order to make them suitable for high-demanding industrial applications. As composites often undergo dynamic loads, it is important to understand their behavior under such conditions. This review first classifies the types of polymer composites and then explains their failure behavior under tension and compression loading, followed by an overview of some of the experimental procedures used to characterize the polymer composites' dynamic mechanical performance. Afterward, the most significant findings in terms of the highstrain-rate compressive and tensile strength and modulus of polymer composites are thoroughly discussed. The results, available in the literature, on the mechanical properties of polymer composites under quasi-static conditions are also presented and compared with the high-strain-rate data. The differences are explained by discussing the changes in the structural configurations of polymer matrices under quasi-static and dynamic loads. Lastly, conclusions and future perspectives are given, with the intent of highlighting the most promising polymer composites that can be used for a wide variety of applications.

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“…Экспериментальные исследования динамических свойств пакетов плетеных металлических сеток проводились на экспериментальной установке с разрезным стержнeм Гопкинсона [15][16][17]. Образцы изготавливались из двух типов сеток: НУ ГОСТ 3826-82 -2×2×0,5 и 3,2×3,2×0,8.…”

Section: методика динамических испытанийunclassified

Экспериментальное Исследование Деформационных Характеристик Пакетов Плетеных Металлических Сеток При Динамическом И Квазистатическом Нагружении

Bragov¹,

Zhegalov²,

Konstantinov³

et al. 2016

PNRPU MB

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ходит через стык стержней, не деформируя образец. Статическое растяжение образцов сеток производится на испытательных машинах Zwick. Испытания проведены для образцов с различным шагом плетения сеток и различным количеством слоев. Опытами определены необходимые размеры рабочей части образца. Показано, что диаграммы деформирования при растяжении вдоль проволок в плоскости слоев и при сжатии по нормали к слоям сетки при всех режимах нагружения носят нелинейный и необратимый характер, а также проявляют существенную зависимость от скорости деформации. При квазистатическом растяжении пакетов сеток в направлении проволок существенное влияние оказывает их предварительное обжатие по нормали к слоям сеток. При динамическом растяжении этот эффект выражен значительно слабее.

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Investigations on specimen design and mounting for Split Hopkinson Tension Bar (SHTB) experiments

Cited by 19 publications

References 6 publications

An Improved Load Introduction Technique for Dynamic Material Characterisation at Intermediate Strain Rate

An Improved Load Introduction Technique for Dynamic Material Characterisation at Intermediate Strain Rate

High‐strain‐rate mechanical performance of particle‐ and fiber‐reinforced polymer composites measured with split Hopkinson bar: A review

Экспериментальное Исследование Деформационных Характеристик Пакетов Плетеных Металлических Сеток При Динамическом И Квазистатическом Нагружении

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