Numerical simulation of fracture toughness test under high strain rate

Ye Bo; Wu Xutao; Hu Fenghui; Liao Li

doi:10.11883/1001-1455(2016)03-0416-06

Volume 36 Issue 3

Oct. 2018

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Ye Bo, Wu Xutao, Hu Fenghui, Liao Li. Numerical simulation of fracture toughness test under high strain rate[J]. Explosion And Shock Waves, 2016, 36(3): 416-421. doi: 10.11883/1001-1455(2016)03-0416-06

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Numerical simulation of fracture toughness test under high strain rate

doi: 10.11883/1001-1455(2016)03-0416-06

School of Civil Engineering, Hefei University of Technology, Hefei 230009, Anhui, China

Received Date: 2014-10-13
Rev Recd Date: 2015-02-03
Publish Date: 2016-05-25

Abstract

Abstract

In this work we conducted numerical simulations of semi-circular bending (SCB) test of steel with cracks respectively in a static condition and under impact loading, using ANSYS/LS-DYNA, a finite element software. According to the results achieved from the simulation of the static test, we have put forward the formula for the calculation of Steel Ⅰ's fitted stress intensity factor which, when applied to the calculation of the factor under the mixed-mode loading, can keep the maximum error below 10%. The simulation result of dynamic test shows that: for semi-circular bending (SCB) test of pure Steel Ⅰ under impact loading, the dynamic stress intensity factor exhibits regular variation with the change in the specimen's radius, the distance between the supports, and the relative crack length: When the specimen's radius is less than 60 mm, the distance between two supports is 1.2 and the relative crack length is in the range of 0.1 to 0.4, the inertial effect is relatively small and the error of the dynamic stress intensity factor calculated with the above formula is about 10%; when the relative crack length is 0.2 to 0.4 and the crack angle is in the range of 10° to 40°, the error of KId which is calculated with this formula is less than 10% for semi-circular bending (SCB) test under mixed-mode loading.
- solid mechanics,
- fracture toughness,
- impact loading,
- stress intensity factor,
- SCB test with crack,
- mixed-mode loading

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References

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