Brittle Failure Mechanism of Multiple Locked Patches in a Seismogenic Fault and Exploration of a New Approach to Earthquake Prediction

2010 ◽  
Vol 53 (4) ◽  
pp. 611-626 ◽  
Author(s):  
Si-Qing QIN ◽  
Xi-Wei XU ◽  
Ping HU ◽  
Yuan-Yuan WANG ◽  
Xin HUANG ◽  
...  
Keyword(s):  
Failure Mechanism ◽  
Earthquake Prediction ◽  
Brittle Failure ◽  
Seismogenic Fault ◽  
New Approach

A new approach to earthquake prediction: The Load/Unload Response Ratio (LURR) theory

1995 ◽  
Vol 145 (3-4) ◽  
pp. 701-715 ◽  
Author(s):  
Xiang-Chu Yin ◽  
Xue-zhong Chen ◽  
Zhi-ping Song ◽  
Can Yin
Keyword(s):  
Earthquake Prediction ◽  
Response Ratio ◽  
New Approach

Analysis of Stresses for Cross-Ply Laminates with a Matrix Crack under Bending

2011 ◽  
Vol 284-286 ◽  
pp. 492-495
Author(s):  
Qing Dun Zeng ◽  
Mao Hua Ouyang
Keyword(s):  
Failure Mechanism ◽  
Transverse Crack ◽  
Approximate Solutions ◽  
Matrix Crack ◽  
Stress Distributions ◽  
Shear Lag ◽  
New Approach ◽  
Shear Lag Model ◽  
Lag Model ◽  
Shear Lag Theory

On the basis of the shear-lag theory, an analysis was presented for stress redistributions of cross-ply laminates with a transverse matrix crack in the 90º ply under bending by establishing a layered shear-lag model. The present results show that approximate solutions of displacement and stress distributions for cross-ply laminates with a transverse crack under bending can be obtained by using a shear-lag method. The present paper therefore affords a new approach for studying the stress redistributions and failure mechanism for cross-ply laminates with flaw under bending.

A New Approach to Determine Cutting Forces in Brittle Rock Under Hyperbaric Conditions

2014 ◽  
Author(s):  
Sape A. Miedema
Keyword(s):  
Tensile Strength ◽  
Shear Strength ◽  
Cutting Forces ◽  
Brittle Failure ◽  
Cutting Process ◽  
Tensile Failure ◽  
Atmospheric Conditions ◽  
New Approach ◽  
Ductile Cutting ◽  
Hyperbaric Conditions

Merchant (1944), (1945A) and (1945B) derived a model for determining the cutting forces when machining steel. The model was based on elastic-plastic deformation and a continuous chip formation (ductile cutting). The model included internal and external friction and shear strength, but no adhesion, gravity, inertia and pore pressures. Later Miedema (1987 September) extended this model with adhesion, gravity, inertial forces and pore water pressures. These models however only describe the so called Flow Type of cutting process, which is the ductile cutting process. The ductile cutting process requires a relatively large tensile strength (BTS) compared to the compressive strength (UCS) or shear strength. If the tensile strength is not large enough, brittle failure based on tensile failure may occur. This paper describes a new method of determining the cutting forces resulting from brittle failure, still based on the original ductile models, but with a correction for the stresses. This new model can be used for Deep Sea Mining Applications. It is assumed that materials which behave brittle under atmospheric conditions will behave ductile under hyperbaric conditions.

scholarly journals Strength of Footing with Punching Shear Preventers

2014 ◽  
Vol 2014 ◽  
pp. 1-15 ◽  
Author(s):  
Sang-Sup Lee ◽  
Jiho Moon ◽  
Keum-Sung Park ◽  
Kyu-Woong Bae
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Failure Mechanism ◽  
Brittle Failure ◽  
Shear Failure ◽  
Experimental Studies ◽  
Nonlinear Finite Element ◽  
Punching Shear ◽  
Element Analysis ◽  
Strength And Ductility

The punching shear failure often governs the strength of the footing-to-column connection. The punching shear failure is an undesirable failure mode, since it results in a brittle failure of the footing. In this study, a new method to increase the strength and ductility of the footing was proposed by inserting the punching shear preventers (PSPs) into the footing. The validation and effectiveness of PSP were verified through a series of experimental studies. The nonlinear finite element analysis was then performed to demonstrate the failure mechanism of the footing with PSPs in depth and to investigate the key parameters that affect the behavior of the footing with PSPs. Finally, the design recommendations for the footing with PSPs were suggested.

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