Analysis on 3D surface crack transient propagation process

作者：Guo Lingli^*; Wong Robina H C; Liu Liqiang; Yin Peng

来源：2nd International Conference on Civil Engineering and Building Materials, CEBM 2012, 2012-11-17 to 2012-11-18.

• 3D surface
• Duration time
• Earth crusts
• Earth surface
• Fault model
• Finite depth
• Ground surfaces
• Last stage
• Multi-points
• Rapid process
• Sample failure
• Surface faults
• Tectonic structure
• Transient propagation

Surface faults, which extend from ground surface to a finite depth, are one of the common tectonic structures found on the earth surface. The mechanism of cracking from surface fault front differs significantly from cracking from the idealized 2-D fault model, which assumes fault extending infinitely into the earth crust. The crack emanating from pre-existing 3-D surface fault is still not fully understood. This paper summarizes our latest endeavor in simulating crack growth from a pre-existing 3-D surface fault. There is a stable period existed between the fully propagation and coalescence and sample failure, and the duration time is several tens milliseconds. The coalescence of the bridge area occurs at the last stage and is a rapid process. The crack initiation is discontinued or linear, but multi points initiate and combine each other random.

• 出版日期2012
• 单位香港理工大学; 中国地震局