Pulse Shaper and Dynamic Compressive Property Investigation on Ice Using a Large-Sized Modified Split Hopkinson Pressure Bar

Song, Zhenhua; Wang, Zhi Hua; Kim, Hyonny; Ma, Hongwei

doi:10.1590/1679-78252458

Cited by 19 publications

(7 citation statements)

References 30 publications

(46 reference statements)

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“…However, the transmission signal of soft biological materials is very weak. To solve this problem, the transmitted bar is a hollow rod with an inner diameter of 18 mm [21,22]. The striker bar is connected to a pneumatic cylinder, and its movement generates a collision between the striker and incident bars.…”

Section: Methodsmentioning

confidence: 99%

“…In addition, a hollow transmitted bar solved the problem that the waves on the transmitted bar were too weak as mentioned above. The transmitted pulse passing through the hollow bar created an ampli ed strain signal, which the sensors could measure easily [21,22]. It was noted that, unliked experiments at quasi-static strain rate, the recorded strain ranges were smaller.…”

Section: Methodsmentioning

confidence: 99%

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Effect of strain rates on the mechanical response of whole muscle bundle

Tran

Tsai²

2023

J Biol Phys

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Muscle injury, especially hamstring muscle, frequently happens during sports activities and exercise which could have serious consequences if not diagnosed and treated promptly. This research investigated the quasi-static and dynamic responses of over 30 fresh semitendinosus muscle-tendonbone structures by utilizing Split Hopkinson Pressure Bars (SHPB) and a material testing system under the strain rates between 0.001 ~ 200 s − 1 . Because of the special shape of muscle-tendon-bone structures, PLA-material clampers were produced by 3D printer to properly hold and to prevent slippery during the test process. The mechanical characteristics of the whole muscle bundle, including Young's modulus and stress-strain curve, are illustrated at various strain rates. The ndings showed that the muscle properties were sensitive with strain rate at the passive deformation. Both maximum stress and Young's modulus increased with the rise of strain rate, and modulus at 200 s − 1 can be as high as 10 times compared with quasi-static conditions.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Effect of strain rates on the mechanical response of whole muscle bundle

Tran

Tsai²

2023

J Biol Phys

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“…One way of achieving this is to increase the rise time of the loading pulse by placing a piece of copper shim on the impact end of the input bar ( Fig. 8) [24,25,[74][75][76][77]. We used colloidal graphite lubricant paste to attach the shim to the bar end.…”

Section: Split Hopkinson Pressure Barmentioning

confidence: 99%

Problems Associated with Making Mechanical Measurements on Water–Ice at Quasistatic and Dynamic Strain Rates

Potter

Cammack

Braithwaite

et al. 2019

J. dynamic behavior mater.

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Space penetrators are a potential method of inserting instrumentation onto ice-covered bodies in the solar system. Part of a study to see whether this is feasible involves numerically simulating impact of the penetrator into ice at impact velocities of a few 100 m/s. In order to do this accurately, it is necessary to have a constitutive model for water ice that is valid at the strain rates and temperatures relevant to impact in the Outer Solar System. This paper reports certain issues and difficulties that arose during a study to obtain this data.

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“…Bagher Shemirani et al [23] have studied the effects of parameters, such as striker bar velocity and diameter and pulse shaper thickness, on the incident wave and concluded that a small diameter and thick pulse shaper is proper for concrete tests. Song et al [24] have stated that the thickness of a pulse shaper was proportional to the pulse wave rising time.…”

Section: Introductionmentioning

confidence: 99%

Constant Strain Rate Uniaxial Compression of Green Sandstone during SHPB Tests Driven by Pendulum Hammer

Zhu

Niu

et al. 2017

Shock and Vibration

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During the Split-Hopkinson pressure bar (SHPB) tests driven by pendulum hammer, employing a proper special shape striker is an effective way to obtain dynamic stress equilibrium condition and to get constant strain rate of the rock specimen. To find the proper special shape striker, a striker with a cambered surface was introduced and eight geometrically different hammers were designed to analyze the effect of hammer geometry on the waveform of excited incident stress waves. Based on experiments and simulations, parameter effects, including the cambered hammer curvature radius and hammer diameter, length, and impact velocity, on the incident wave shape were examined. These parametric studies provided guidelines for achieving constant strain rates in rock specimens during SHPB tests. The use of different diameter hammers was noted for shaping stress-time curves to follow the stress-strain behavior of green sandstone. Finally, to examine the applicability of using hammer geometry for shaping incident waves to achieve constant strain rate, SHPB tests on green sandstone specimens were conducted. The results demonstrated that a constant strain rate (100 s −1 ) lasting for 70 s was achieved with the 8# hammer (3.7 kg; curvature radius, diameter, and length of 100, 70, and 126.3 mm, resp.). In addition, dynamic experiments on green sandstone were carried out under various strain rates and the results showed that the initial tangential modulus was almost unaffected by strain rate. The strain at peak stress tended to increase with rising strain rate and the dynamic strength of green sandstone showed an apparent rate dependency.

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Pulse Shaper and Dynamic Compressive Property Investigation on Ice Using a Large-Sized Modified Split Hopkinson Pressure Bar

Cited by 19 publications

References 30 publications

Effect of strain rates on the mechanical response of whole muscle bundle

Effect of strain rates on the mechanical response of whole muscle bundle

Problems Associated with Making Mechanical Measurements on Water–Ice at Quasistatic and Dynamic Strain Rates

Constant Strain Rate Uniaxial Compression of Green Sandstone during SHPB Tests Driven by Pendulum Hammer

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