Numerical Investigation on the Necessity of a Constant Strain Rate Condition According to Material’s Dynamic Response Behavior in the SHPB Test

Zou, Huiran; Yin, Wang; Cai, Chongyang; Yang, Zehua; Li, Y.B.; He, Xianqun

doi:10.1007/s11340-018-00468-x

Cited by 8 publications

(3 citation statements)

References 40 publications

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“…Figure 8 shows the original waveform of three waves at the impact pressure of 0.2 MPa. According to the one-dimensional stress wave theory and the assumption of uniformity introduced into the specimen, the average strain rate, average strain, and average stress on the two end faces of the specimen in the testing process are as follows [26]: The length of the absorption bar is 1.5 m, the length of the incident bar and transmission bar is 3.0 m, and the diameter is 50 mm. The bars are made of high-strength alloy steel, 48CrMoA, with a density of 7.8 g/cm 3 , an elastic modulus of 206 GPa, a yield strength of 835 MPa, and a P-wave velocity of 5172 m/s.…”

Section: Shpb Test and Resultsmentioning

confidence: 99%

“…Figure 8 shows the original waveform of three waves at the impact pressure of 0.2 MPa. According to the one-dimensional stress wave theory and the assumption of uniformity introduced into the specimen, the average strain rate, average strain, and average stress on the two end faces of the specimen in the testing process are as follows [26]: According to the one-dimensional stress wave theory and the assumption of uniformity introduced into the specimen, the average strain rate, average strain, and average stress on the two end faces of the specimen in the testing process are as follows [26]:…”

Section: Shpb Test and Resultsmentioning

confidence: 99%

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Calibration Method of PFC3D Micro-Parameters under Impact Load

Zhang,

Gao,

Kou

2024

Applied Sciences

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Micro-parameter calibration is essential in constructing an accurate and reliable numerical model of particle discrete element PFC3D 6.0 software. Micro-parameter calibration is mainly accomplished according to the macro-parameters obtained from static or quasi-static laboratory tests such as UCS. However, there is little current research concerning the calibration method under impact load. An SJM micro-parameter calibration method, based on the SHPB rock test and the FLAC3D/PFC3D coupling method, is proposed to solve this problem. Firstly, UCS, SHPB, and other laboratory rock tests were carried out to determine the rock sample’s macroscopic physical and mechanical parameters. Secondly, the FLAC3D/PFC3D numerical coupling model of the SHPB test was established, and the single-factor and double-factor orthogonal numerical simulation was carried out. Then, the main micro-parameters that affect the macroscopic physical and mechanical parameters of the SJM particle discrete element model were proposed. Finally, the quantitative relationship between the model’s macro-parameters and micro-parameters was established through multiple linear regression. A set of PFC3D micro-parameter calibration processes under impact load was established. The relative errors of the macro-parameters obtained from laboratory and numerical tests totaled less than 5%, which further verifies the rationality of the calibration method. This method provides some reference values for PFC3D micro-parameter calibration under impact load.

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Section: Shpb Test and Resultsmentioning

confidence: 99%

“…Figure 8 shows the original waveform of three waves at the impact pressure of 0.2 MPa. According to the one-dimensional stress wave theory and the assumption of uniformity introduced into the specimen, the average strain rate, average strain, and average stress on the two end faces of the specimen in the testing process are as follows [26]: According to the one-dimensional stress wave theory and the assumption of uniformity introduced into the specimen, the average strain rate, average strain, and average stress on the two end faces of the specimen in the testing process are as follows [26]:…”

Section: Shpb Test and Resultsmentioning

confidence: 99%

Calibration Method of PFC3D Micro-Parameters under Impact Load

Zhang,

Gao,

Kou

2024

Applied Sciences

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“…These materials are generally known for their low densities and high energy absorption efficiencies (EAEs) (Cheng et al ., 2018; Sonti et al ., 2022). Due to these properties, materials with high EAE are widely preferred in industrial areas such as shipbuilding, aviation, construction, automobile and security applications (Öchsner and Grácio, 2005; Su et al ., 2019; Yang et al ., 2020; Zou et al ., 2019). It is one of the most used matrix materials in syntactic foams due to the properties of aluminum alloys such as corrosion and good castability.…”

Section: Introductionmentioning

confidence: 99%

A comprehensive study on using expanded silica gel size as hollow sphere material in different aluminum alloy-based syntactic foams

YAVUZ

Şimşir

Yildirim

2022

MMMS

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PurposeMetal foams are a structural and functional composite materials that have received wide attention due to their specific structures and properties. The aim of this study is to investigate the mechanical properties of syntactic foam by using expanded silica gel with the spacer technique.Design/methodology/approachIn this research paper, the vacuum casting production method was used to produce metal syntactic foams including AlSi12 and AlSi8Cu3 matrix and expanded silica gel fillers with diameters of 2–4.75 mm and 4.75–5.6 mm.FindingsAs a result of the study, it was observed that as the foam densities increased, the compressive strength values of the samples increased due to the increasing volume fraction of the metallic matrix. Samples with the AlSi12 matrix showed higher compressive strength than samples with the AlSi8Cu3 matrix.Originality/valueThe originality of the study is the comparison of two different main matrix alloys (AlSi12 and AlSi8Cu3) and different pores using expanded silica gel.

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