scholarly journals FY08 LDRD Final Report A New Method for Wave Propagation in Elastic Media LDRD Project Tracking Code: 05-ERD-079

2009 ◽  
Author(s):  
A Petersson
Keyword(s):  
Wave Propagation ◽  
New Method ◽  
Final Report ◽  
Elastic Media

A New Method of Preparing Artificial Cores with Certain Cracks for Experiment Study of Elastic Wave Propagation

2011 ◽  
Vol 356-360 ◽  
pp. 2954-2957 ◽  
Author(s):  
Zi Zhen Wang ◽  
Ri He Wang ◽  
Yu Huan Bu ◽  
Xun Shan
Keyword(s):  
Wave Propagation ◽  
Aspect Ratio ◽  
Elastic Wave ◽  
Steel Sheet ◽  
Crack Opening ◽  
Elastic Wave Propagation ◽  
New Method ◽  
Thin Steel Sheet ◽  
Fractured Medium ◽  
Thin Steel

Crack universally existing underground is an important kind of pores. In order to study the elastic wave propagation in fractured medium through experiment, a new method to make artificial core with certain cracks using oil well cement and camphor sheet or thin steel sheet is put forward. Geometric parameters of the crack, such as shape, size and aspect ratio, are approximately equal to that of camphor sheet or thin steel sheet. Using the thin steel sheet to make crack can be more easy and accurate to control the crack angle than using camphor sheet. The crack opening scales at millimeters. The aspect ratio of cracks formed by camphor sheet ranges from 1.4 to 8, and aspect ratio of cracks formed by thin steel sheet ranges from 2.5 to 70. This method is proved simple and feasible by experiment practice, which can provide artificial cores with certain crack for acoustic wave propagation study.

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