The mechanical property and microscopic deformation mechanism of nanoparticle-contained graphene foam materials under uniaxial compression

2020 ◽  
Vol 32 (11) ◽  
pp. 115701
Author(s):  
Muhammad Bilal Khan ◽  
Chao Wang ◽  
Shuai Wang ◽  
Daining Fang ◽  
Shaohua Chen
Keyword(s):  
Mechanical Property ◽  
Uniaxial Compression ◽  
Deformation Mechanism ◽  
Graphene Foam ◽  
Microscopic Deformation

scholarly journals Mechanical Property Measurements and Fracture Propagation Analysis of Longmaxi Shale by Micro-CT Uniaxial Compression

Energies ◽  
2018 ◽  
Vol 11 (6) ◽  
pp. 1409 ◽  
Author(s):  
Minyue Zhou ◽  
Yifei Zhang ◽  
Runqing Zhou ◽  
Jin Hao ◽  
Jijin Yang
Keyword(s):  
Mechanical Property ◽  
Uniaxial Compression ◽  
Fracture Propagation ◽  
Micro Ct ◽  
Propagation Analysis ◽  
Longmaxi Shale

Warpage Prediction of Ball Grid Array Packaging

2007 ◽  
Author(s):  
Yeong K. Kim ◽  
Russell Peak ◽  
Dirk Zwemer
Keyword(s):  
Experimental Data ◽  
Mechanical Properties ◽  
Mechanical Property ◽  
Simulation Model ◽  
Significant Influence ◽  
Deformation Mechanism ◽  
Ball Grid Array ◽  
Molding Compound ◽  
Different Types ◽  
Property Modeling

The effect of material property modeling on the warpage calculation is studied in this paper. A chip level packaging of ball grid array was considered for the simulation model. The mechanical properties of thin FR-4 and molding compound were modeled as elastic and viscoelastic based on the experimental data, and warpage developments during cooldown were calculated using different types of the mechanical property modeling. It was found that the viscoelastic characters of the FR-4 and the molding compound had significant influence on the warpage development. The results were compared with those of elastic cases, and discussions were given to analyze the deformation mechanism.

scholarly journals The Effect of Bedding Structure on Mechanical Property of Coal

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Zetian Zhang ◽  
Ru Zhang ◽  
Guo Li ◽  
Hegui Li ◽  
Jianfeng Liu
Keyword(s):  
Mechanical Property ◽  
Uniaxial Compression ◽  
Peak Stress ◽  
Natural Fracture ◽  
Test Results ◽  
Compression Tests ◽  
Average Amount ◽  
Uniaxial Compression Strength ◽  
Bedding Planes ◽  
Close Relationship

The mechanical property of coal, influencing mining activity considerably, is significantly determined by the natural fracture distributed within coal mass. In order to study the effecting mechanism of bedding structure on mechanical property of coal, a series of uniaxial compression tests and mesoscopic tests have been conducted. The experimental results show that the distribution characteristic of calcite particles, which significantly influences the growth of cracks and the macroscopic mechanical properties of coal, is obviously affected by the bedding structure. Specifically, the uniaxial compression strength of coal sample is mainly controlled by bedding structure, and the average peak stress of specimens with axes perpendicular to the bedding planes is 20.00 MPa, which is 2.88 times the average amount of parallel ones. The test results also show a close relationship between the bedding structure and the whole deformation process under uniaxial loading.

Research on Surface Microstructures of Nanocomposite Ceramics in Two-Dimensional Ultrasonic Ultraprecision Grinding

2007 ◽  
Vol 364-366 ◽  
pp. 909-913 ◽  
Author(s):  
Bo Zhao ◽  
Jing Lin Tong ◽  
Yan Wu ◽  
Guo Fu Gao
Keyword(s):  
Grain Boundary ◽  
Deformation Mechanism ◽  
Grain Boundary Sliding ◽  
Nano Particles ◽  
Surface Generation ◽  
Second Phase ◽  
Two Dimensional ◽  
Boundary Sliding ◽  
Microscopic Deformation ◽  
Surface Microstructures

Using TEM, SEM and XRD, the surface microstructures of nanocomposite ceramics prepared by heterocoagulation was studied in two-dimensional ultraprecision grinding with ultrasonic assistance. This research was focused on the structure of ground surface degenerating layer, surface generation mechanism and characteristics of nanocomposite ceramic parts. The experimental results showed that the microscopic deformation mechanism of the ordinary Al2O3 parts was grain- boundary twinning and grain-boundary sliding while microscopic deformation mechanism of nanophase ceramic parts was the inner crystal dislocation of strengthened phase with intragranular structure. And its deformation coordination mechanisms were the grain-boundary sliding and coordination deformation of intercrystalline second-phase. The observation on the fracture surfaces of nanocomposite materials with different microscopic structures by TEM and SEM showed that ZrO2 particles had an important effect on the generation and expansion of crack in ceramic parts. The introduction of ZrO2 particles strengthened the interface intensity of grain boundary. If there were rich ZrO2 particles on the grain boundary, the cracks generated during the grinding process would be prevented. Smooth and plastic deformation processing surface was obtained. It was proved further that the nanophase materials behaved transcrystalline fracture due to the nano particles, dispersed in the grain boundary and prevented the expansion of crack. This material’s fracture behavior made favorable surface possible. In the precise grinding of nano materials, the plastic removal mechanism dominated the process. The dislocated depth of the nanocomposite ceramics after grinding was bigger than that of common ceramics, which meant that dislocation increased.

Research Review on Bearing Capacity of Pile Foundation under Complex Loads

2012 ◽  
Vol 256-259 ◽  
pp. 125-128
Author(s):  
Jian Wei Zhang ◽  
Qing Mei Kong ◽  
Bo Wang
Keyword(s):  
Mechanical Property ◽  
Bearing Capacity ◽  
Deformation Mechanism ◽  
Pile Foundation ◽  
Research Review ◽  
Mountainous Areas ◽  
Complex Load ◽  
Urban Construction ◽  
Train Of Thought

With the deepening of China's urbanization, the urban construction land in the mountainous areas is becoming increasingly tense, more and more bulidings pile had to be built on the hillsides. The pile is not only as foundation, but also have the role of reinforcement slope, its mechanical property is complex more than the anti-slide pile and ground piles under lateral load. Now the analysis against its bearing characteristics and deformation mechanism are not perfect, carrying out a thorough and meticulous research review is necessarily. Based on the review of current study on pile under icomplex loads, the present study provides a train of thought for further research on the behavior of pile under complex load.

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