AN INVESTIGATION INTO THE EFFECT OF SAMPLE SHAPE ON ELASTIC DYNAMIC AND ELASTIC STATIC PROPERTIES OF LIMESTONE

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FOULADCHI S.; HOSSEINI M.F.; GANJI MOJTABA

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Paper Information

Journal: IRANIAN JOURNAL OF MINING ENGINEERING (IRJME) Year:2006 | Volume:1 | Issue:1 Page(s): 1-10

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Title

AN INVESTIGATION INTO THE EFFECT OF SAMPLE SHAPE ON ELASTIC DYNAMIC AND ELASTIC STATIC PROPERTIES OF LIMESTONE

Author(s)

FOULADCHI S. | HOSSEINI M.F. | GANJI MOJTABA | Issue Writer Certificate

Keywords

STATIC/DYNAMIC MODULUS OF ELASTICITYQ4

STATIC/DYNAMIC MODULUS OF RIGIDITYQ4

STATIC/DYNAMIC POISON RATIO LONGITUDINAL WAVE SPEEDQ4

SHEAR WAVE SPEEDQ4

Abstract

Dynamic methods are, nowadays, fast and inexpensive ways of estimating elastic constants in rock engineering. Therefore, In order to get reliable ontputs all effective factors of such methods are to be assessed. One of fundamental factor affecting the test results is the shape or height/diameter (L/D) ratio of the tested specimen. The existing standards, namely ASTM and ISRM standards imply that, in spite of the great role of the (L/D) ratio on the static test results, this ratio does not play an important role on dynamic test results. With aim of determining the exact role of (L/D) ratio on static and dynamic properties of rocks, 3 dynamic and 5 static tests were conducted on Neka Limestone samples with 6 various (L/D) ratios of 0.5, 1, 1.5, 2, 2.5 and 3 (48 sets of tests in all).The data produced through these tests showed that varying (L/D) ratio from 0.5 to 3 results in ample variation of mechanical parameters in both types of tests. The laboratory produced data indicated that static tests are affected more by (L/D) ratio than dynamic ones. It was also concluded that when the value of (L/D) gets close to 3, elastic dynamic parameters reach more or less constant values whereas static parameters are still in change. These finding show that the effect of sample shape on dynamic properties of rock has not been counted for properly. This importance of this factor has to be recognized. Also, when static tests are concerned, the previously recommended ratio of (L/D) has to be further assessed.

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References

COMPARISON OF THE EFFECT OF SHAPE AND CONFINING PRESSURE ON THE UNI-AXIAL AND TRI-AXIAL COMPRESSIVE STRENGTH OF ROCKS

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APA: Copy

FOULADCHI, S., HOSSEINI, M.F., & GANJI, MOJTABA. (2006). AN INVESTIGATION INTO THE EFFECT OF SAMPLE SHAPE ON ELASTIC DYNAMIC AND ELASTIC STATIC PROPERTIES OF LIMESTONE. IRANIAN JOURNAL OF MINING ENGINEERING (IRJME), 1(1), 1-10. SID. https://sid.ir/paper/117159/en

Vancouver: Copy

FOULADCHI S., HOSSEINI M.F., GANJI MOJTABA. AN INVESTIGATION INTO THE EFFECT OF SAMPLE SHAPE ON ELASTIC DYNAMIC AND ELASTIC STATIC PROPERTIES OF LIMESTONE. IRANIAN JOURNAL OF MINING ENGINEERING (IRJME)[Internet]. 2006;1(1):1-10. Available from: https://sid.ir/paper/117159/en

IEEE: Copy

S. FOULADCHI, M.F. HOSSEINI, and MOJTABA GANJI, “AN INVESTIGATION INTO THE EFFECT OF SAMPLE SHAPE ON ELASTIC DYNAMIC AND ELASTIC STATIC PROPERTIES OF LIMESTONE,” IRANIAN JOURNAL OF MINING ENGINEERING (IRJME), vol. 1, no. 1, pp. 1–10, 2006, [Online]. Available: https://sid.ir/paper/117159/en

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