Relationship between diameter of split Hopkinson pressure bar and minimum loading rate under rock failure

In order to investigate the relationship between bar diameter and loading rate of the split Hopkinson pressure bar(SHPB) setup under the failure of rock specimen and realize the medium strain rate loading of specimen, new SHPB setups with different elastic bar’s diameters of 22, 36, 50 and 75 mm were constructed. The tests were carried out on these setups at different loading rates, and the specimens had the same diameter of elastic bars and same ratio of length to diameter. The test results show that the larger the elastic bar’s diameter is, the less the loading rate is needed to cause specimen failure, they show good power relationship, and that under the same strain rate loading, specimens are broken more seriously with larger diameter SHPB setup than with smaller one.

[1]  S. C. Hunter,et al.  The Dynamic Compression Testing of Solids by the Method of the Split Hopkinson Pressure Bar , 1963 .

[2]  S. J. Green,et al.  Uniaxial Compression Tests At Varying Strain Rates On Three Geologic Materials , 1968 .

[3]  S. J. Green,et al.  Uniaxial stress behavior of porphyritic tonalite at strain rates to 103/second , 1970 .

[4]  T. L. Blanton.  Effect of strain rates from 10-2 to 10 sec-1 in triaxial compression tests on three rocks , 1981 .

[5]  L. E. Malvern,et al.  Dispersion Investigation in the Split Hopkinson Pressure Bar , 1990 .

[6]  J. M. Lifshitz,et al.  Data processing in the split Hopkinson pressure bar tests , 1994 .

[7]  Han Zhao,et al.  On the use of SHPB techniques to determine the dynamic behavior of materials in the range of small strains , 1996 .

[8]  Josef Eibl,et al.  STRAIN-RATE-SENSITIVE CONSTITUTIVE LAW FOR CONCRETE , 1999 .

[9]  Josef Eibl,et al.  New Approach to Strain Rate Sensitivity of Concrete in Compression , 1999 .

[10]  Xibing Li,et al.  Oscillation elimination in the Hopkinson bar apparatus and resultant complete dynamic stress-strain curves for rocks , 2000 .

[11]  Zhang Xue.  Development of Material Testing Apparatus for Intermediate Strain Rate Test , 2001 .

[12]  Xibing Li,et al.  TESTING AND RESPONSE OF LARGE DIAMETER BRITTLE MATERIALS SUBJECTED TO HIGH STRAIN RATE , 2002 .

[13]  Stephen M. Walley,et al.  Review of experimental techniques for high rate deformation and shock studies , 2004 .

[14]  Wang Weihua.  CONSTRUCTION OF IDEAL STRIKER FOR SHPB DEVICE BASED ON FEM AND NEURAL NETWORK , 2005 .

[15]  Xibing Li,et al.  Dynamic Characteristics of Granite Subjected to Intermediate Loading Rate , 2005 .