scholarly journals Numerical simulation of dynamic TPB fracture test in a modified Hopkinson bar

2003 ◽  
Vol 110 ◽  
pp. 305-310 ◽  
Author(s):  
J. Loya ◽  
J. Fernandez-Saez ◽  
C. Navarro
Keyword(s):  
Numerical Simulation ◽  
Hopkinson Bar ◽  
Fracture Test ◽  
Modified Hopkinson Bar

scholarly journals Dynamic behaviour of an earthen material under different impact loading conditions

2018 ◽  
Vol 183 ◽  
pp. 02014
Author(s):  
Luigi Fenu ◽  
Francesco Aymerich ◽  
Luca Francesconi ◽  
Daniele Forni ◽  
Nicoletta Tesio ◽  
...  
Keyword(s):  
Dynamic Response ◽  
Impact Loading ◽  
Dynamic Behaviour ◽  
Hopkinson Bar ◽  
Impact Response ◽  
Favourable Effect ◽  
Impact Loads ◽  
Response Curves ◽  
Hemp Fibres ◽  
Modified Hopkinson Bar

The dynamic behaviour of earthen materials reinforced with natural fibres is little studied although earth buildings are often built in seismic areas. In this paper the dynamic behaviour of an earthen material reinforced with hemp fibres under different impact loadings has been experimentally investigated. The dynamic response of the material in 3-point bending was investigated through an instrumented dropweight device, while the response in tension and in compression was investigated through a modified Hopkinson bar device. Typical impact response curves for tension, compression and bending impact tests have been obtained. The favourable effect of fibres in dissipating fracture energy under impact loads has been observed in all these types of test.

The Influence of Material Constitutive Constants on Numerical Simulation of Orthogonal Cutting of Titanium Alloy Ti6Al4V

2008 ◽  
Vol 375-376 ◽  
pp. 182-186 ◽  
Author(s):  
Jian Ling Chen ◽  
Jian Feng Li ◽  
Jie Sun ◽  
Zhong Qiu Wang ◽  
Zhi Ping Xu
Keyword(s):  
Numerical Simulation ◽  
Titanium Alloy ◽  
Orthogonal Cutting ◽  
Chip Morphology ◽  
Hopkinson Bar ◽  
Material Constants ◽  
Metal Machining ◽  
Split Hopkinson ◽  
Titanium Alloy Ti6al4v ◽  
2D Numerical Model

Johnson-Cook (JC) constitutive model is extensively used in the simulation of metal machining. There are several different sets of JC material constants for titanium alloy Ti6Al4V fitted by split-Hopkinson bar (SHPB) tests. However, few researches have been done to study their sensitivity on the behavior of cutting. In this work, four different sets of material constants were performed in a 2D numerical model to simulate the cutting process of titanium alloy Ti6Al4V. The effects of the four sets of material constants on the predicted cutting forces, chip morphology and temperature were studied. It is shown that all the considered process outputs are very sensitive to material constitutive constants. Some quantitive comparisons with experimental results reported in the literature were also made.

Statistical Laws of Dynamic Fragmentation of ZrO2 Ceramics

2015 ◽  
Vol 784 ◽  
pp. 468-475 ◽  
Author(s):  
Marina Davydova ◽  
Sergey Uvarov ◽  
Vasiliy Chudinov
Keyword(s):  
Experimental Data ◽  
Size Distribution ◽  
Power Law ◽  
Fragment Size ◽  
Hopkinson Bar ◽  
Fragment Size Distribution ◽  
Dynamic Fragmentation ◽  
Ceramic Samples ◽  
Modified Hopkinson Bar ◽  
Statistical Laws

Dynamic fragmentation of ceramic samples with different porosity were carried out using modified Hopkinson bar setup, which allow us to keep samples safe (in order to define fragment size distribution) and to measure fractoluminescence impulses occurred on the fracture surfaces (in order to establish the distribution of intervals between impulses). The analysis of experimental data reveals that the fragment size distribution and distribution of interval between fractoluminescence impulses obeys a power law, which exponent depends on ceramics porosity.

scholarly journals Investigation into dynamic response of a three-point bend specimen in a Hopkinson bar loaded fracture test using numerical methods

2015 ◽  
Vol 7 (7) ◽  
pp. 168781401559131
Author(s):  
Raja Ahsan Javed ◽  
Zhu Shifan ◽  
Chunhuan Guo ◽  
Kenneth S Vecchio ◽  
Fengchun Jiang
Keyword(s):  
Numerical Methods ◽  
Dynamic Response ◽  
Hopkinson Bar ◽  
Bend Specimen ◽  
Fracture Test ◽  
Point Bend
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