An analytical study about dynamic failure mechanism of anchor bolts embedded in concrete

2012 ◽  
pp. 387-392
Author(s):  
S Munemoto ◽  
Y Sonoda
Keyword(s):  
Failure Mechanism ◽  
Analytical Study ◽  
Dynamic Failure ◽  
Anchor Bolts

Light Emission and Dynamic Failure Mechanism of Hypervelocity Impact on Zr-Ti-Ni-Cu-Be Bulk Metallic Glass

2011 ◽  
Vol 28 (9) ◽  
pp. 096102 ◽  
Author(s):  
Bao-Ru Sun ◽  
Zai-Ji Zhan ◽  
Bo Liang ◽  
Rui-Jun Zhang ◽  
Wen-Kui Wang
Keyword(s):  
Metallic Glass ◽  
Failure Mechanism ◽  
Bulk Metallic Glass ◽  
Light Emission ◽  
Hypervelocity Impact ◽  
Dynamic Failure

scholarly journals Dynamic failure mechanism of copper foil in laser dynamic flexible forming

2020 ◽  
Vol 38 (4) ◽  
pp. 684-692
Author(s):  
Zongbao Shen ◽  
Lei Zhang ◽  
Pin Li ◽  
Kai Liu ◽  
Youyu Lin ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Failure Mechanism ◽  
Dynamic Fracture ◽  
Strain Localization ◽  
Copper Foil ◽  
Grain Boundary Sliding ◽  
Dynamic Failure ◽  
Flexible Forming ◽  
Before And After ◽  
Localization Region

Abstract Laser dynamic flexible forming (LDFF) is a novel high velocity forming (HVF) technology, in which the foil metal is loaded by laser shock wave. Strain localization is readily to occur around the bulge edge, which will result in the ultimate dynamic failure. In this work, the microstructures before and after dynamic fracture are characterized by transmission electron microscopy (TEM) to investigate the dynamic failure mechanism. The plastic deformation regions of copper foil are composed of shock compression, strain localization and bulge. Microstructure refinement was observed in three different plastic deformation regions, particularly, dynamic recrystallization (DRX) occurs in the strain localization and bulge regions. In bulge region, extremely thin secondary twins in the twin/matrix (T/M) lamellae are formed. The microstructure features in the strain localization region show that superplastic flow of material exists until fracture, which may be due to DRX and subsequent grain boundary sliding (GBS) of the recrystallized grains. The grain coarsening in strain localization region may degrade the material flowing ability which results in the dynamic fracture.

scholarly journals Assessment of the Structure Failure of the Palm Oil Mill Effluent (POME) Digestion Tank Constructed on Peat Soil

2018 ◽  
Vol 7 (3.4) ◽  
pp. 200
Author(s):  
Khairullah Yusuf ◽  
Shahlin Sulaiman ◽  
Shan Suleiman
Keyword(s):  
Bearing Capacity ◽  
Failure Mechanism ◽  
Palm Oil ◽  
Axial Load ◽  
Visual Inspection ◽  
Analytical Study ◽  
Peat Soil ◽  
Structural Failure ◽  
Extraction Processes ◽  
Palm Oil Mill

The structure for extraction processes of palm oil were constructed on peat soil. Piles were commonly adopted for the foundation of such structure to transfer the imposed load to the hard layer of the soil. This study aims to investigate the probable cause of two POME digestion tanks failure at one of extraction processes of palm oil. One of the two tanks collapsed during filled up the tank with the POME and another one shows the symptom of structural failure. Based on visual inspection and analytical study, it is most likely that the failure mechanism of the POME digestion tanks is due to the deviation of the piles that induced moment onto the piles, which exceeded the structural allowable moment of the piles. There is also a possibility that the collapsed tank has been loaded to the point where piles were carrying an axial load that exceeded the said pile bearing capacity.  

The dynamic failure mechanism of a lithium-ion battery at different impact velocity

2020 ◽  
Vol 116 ◽  
pp. 104747
Author(s):  
Shoujun Xi ◽  
Qiancheng Zhao ◽  
Lijun Chang ◽  
Xingyuan Huang ◽  
Zhihua Cai
Keyword(s):  
Lithium Ion Battery ◽  
Failure Mechanism ◽  
Impact Velocity ◽  
Lithium Ion ◽  
Dynamic Failure

scholarly journals The dynamic failure mechanism of coal and gas outbursts and response mechanism of support structure

2019 ◽  
Vol 23 (Suppl. 3) ◽  
pp. 867-875 ◽  
Author(s):  
Mingzhong Gao ◽  
Sheng Zhang ◽  
Jie Li ◽  
Haiyun Wang
Keyword(s):  
Numerical Model ◽  
Failure Mechanism ◽  
Coal And Gas Outburst ◽  
Effective Control ◽  
Dynamic Failure ◽  
Response Mechanism ◽  
Support Structure ◽  
Gas Outburst ◽  
Theoretical Support ◽  
Working Face

In view of the common mine disasters such as coal and gas outburst caused by the destruction of gas and coal, the numerical model of RFPA-GAS software was used to establish a numerical model based on a gas outburst accident took place in return roadway of working face 15-17-16041 in Pingdingshan mine. The dynamic failure mechanism of coal and gas outburst under the conditions of different support strengths protection and unsupported conditions was analyzed. Four dynamic processes of coal and gas outburst were discussed, and the dynamic failure mechanism of coal and gas outburst was revealed. The results show that the outstanding effect of the roadway without support treatment is similar to that of the field, and the coal and gas outburst is obviously weakened for supported roadway. Which has effective control of the active support for the protrusion. When the support method is designed, the response mechanism of the coupled support structure should be considered. It provides some theoretical support for the gas outburst control.

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