Estimation of dynamic fracture toughness of granites using split hopkinson pressure bar (SHPB) system

Myoung Soo Kang; Sang Ho Cho; Sang Eun Lee; Yoon Ho Jang

Estimation of dynamic fracture toughness of granites using split hopkinson pressure bar (SHPB) system

Myoung Soo Kang
, Sang Ho Cho^*
, Sang Eun Lee
, Yoon Ho Jang

^*Corresponding author for this work

Major of Mineral Resources and Energy Engineering

Jeonbuk National University
Kangwon National University

Research output: Conference(x) › Paper › peer-review

1 Scopus citations

Abstract

An experimental approach for determining dynamic fracture toughness of rock materials at high strain rate is presented. Split Hopkinson pressure bar (SHPB) system was used to load the SR (Short Rod) sample of Po-cheon granites and Ham-yeol granites which have anisotropy physical properties under static loading and the smaple were prepared to consider main three direction of pre-exist micro-cracks (Rift, Hardway, Grain). In order to make sure dynamic stress uniformity and constant strain rate of the specimen before the failure, a pulse shaping technique is employed to the SHPB system. The dynamic fracture toughness K_ic was determined by using loading pressure-time curves measured on the transmitted bar and the failure time of the specimen calculated by non-contact laser gap gauge system.

Original language	English
Pages	419-425
Number of pages	7
State	Published - 2012
Event	7th Asian Rock Mechanics Symposium, ARMS 2012 - Seoul, Korea, Republic of Duration: 2012.10.15 → 2012.10.19

Conference

Conference	7th Asian Rock Mechanics Symposium, ARMS 2012
Country/Territory	Korea, Republic of
City	Seoul
Period	12.10.15 → 12.10.19

Keywords

Dynamic Fracture Toughness
Laser gap gauge
SHPB (Split Hopkinson Pressure Bar)

Quacquarelli Symonds(QS) Subject Topics

Earth & Marine Sciences
Geophysics
Engineering - Petroleum
Engineering - Mineral & Mining

Cite this

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title = "Estimation of dynamic fracture toughness of granites using split hopkinson pressure bar (SHPB) system",

abstract = "An experimental approach for determining dynamic fracture toughness of rock materials at high strain rate is presented. Split Hopkinson pressure bar (SHPB) system was used to load the SR (Short Rod) sample of Po-cheon granites and Ham-yeol granites which have anisotropy physical properties under static loading and the smaple were prepared to consider main three direction of pre-exist micro-cracks (Rift, Hardway, Grain). In order to make sure dynamic stress uniformity and constant strain rate of the specimen before the failure, a pulse shaping technique is employed to the SHPB system. The dynamic fracture toughness Kic was determined by using loading pressure-time curves measured on the transmitted bar and the failure time of the specimen calculated by non-contact laser gap gauge system.",

keywords = "Dynamic Fracture Toughness, Laser gap gauge, SHPB (Split Hopkinson Pressure Bar)",

author = "Kang, \{Myoung Soo\} and Cho, \{Sang Ho\} and Lee, \{Sang Eun\} and Jang, \{Yoon Ho\}",

note = "Publisher Copyright: {\textcopyright} 2012 International Society for Rock Mechanics. All rights reserved.; 7th Asian Rock Mechanics Symposium, ARMS 2012 ; Conference date: 15-10-2012 Through 19-10-2012",

year = "2012",

language = "English",

pages = "419--425",

}

TY - CONF

T1 - Estimation of dynamic fracture toughness of granites using split hopkinson pressure bar (SHPB) system

AU - Kang, Myoung Soo

AU - Cho, Sang Ho

AU - Lee, Sang Eun

AU - Jang, Yoon Ho

PY - 2012

Y1 - 2012

N2 - An experimental approach for determining dynamic fracture toughness of rock materials at high strain rate is presented. Split Hopkinson pressure bar (SHPB) system was used to load the SR (Short Rod) sample of Po-cheon granites and Ham-yeol granites which have anisotropy physical properties under static loading and the smaple were prepared to consider main three direction of pre-exist micro-cracks (Rift, Hardway, Grain). In order to make sure dynamic stress uniformity and constant strain rate of the specimen before the failure, a pulse shaping technique is employed to the SHPB system. The dynamic fracture toughness Kic was determined by using loading pressure-time curves measured on the transmitted bar and the failure time of the specimen calculated by non-contact laser gap gauge system.

AB - An experimental approach for determining dynamic fracture toughness of rock materials at high strain rate is presented. Split Hopkinson pressure bar (SHPB) system was used to load the SR (Short Rod) sample of Po-cheon granites and Ham-yeol granites which have anisotropy physical properties under static loading and the smaple were prepared to consider main three direction of pre-exist micro-cracks (Rift, Hardway, Grain). In order to make sure dynamic stress uniformity and constant strain rate of the specimen before the failure, a pulse shaping technique is employed to the SHPB system. The dynamic fracture toughness Kic was determined by using loading pressure-time curves measured on the transmitted bar and the failure time of the specimen calculated by non-contact laser gap gauge system.

KW - Dynamic Fracture Toughness

KW - Laser gap gauge

KW - SHPB (Split Hopkinson Pressure Bar)

UR - https://www.scopus.com/pages/publications/84962404681

M3 - Paper

AN - SCOPUS:84962404681

SP - 419

EP - 425

T2 - 7th Asian Rock Mechanics Symposium, ARMS 2012

Y2 - 15 October 2012 through 19 October 2012

ER -

Estimation of dynamic fracture toughness of granites using split hopkinson pressure bar (SHPB) system

Abstract

Conference

Keywords

Quacquarelli Symonds(QS) Subject Topics

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