Technique development for conducting mechanical tests to study the pore formation process in case of material fracture

2018 ◽  
Author(s):  
D. K. Magomedova ◽  
M. A. Efimov ◽  
M. Yu. Murashkin
Keyword(s):  
Formation Process ◽  
Pore Formation ◽  
Mechanical Tests ◽  
Material Fracture ◽  
Technique Development

Numerical and Experimental Investigation of Deep Drawing of Sandwich Panels

2014 ◽  
Vol 611-612 ◽  
pp. 1627-1636 ◽  
Author(s):  
Sergey Tipalin ◽  
Michael A. Petrov ◽  
Boris Saprikin ◽  
Nikolay Kosatchyov ◽  
Nikolay Shpunkin ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Experimental Investigation ◽  
Deep Drawing ◽  
Mechanical Tests ◽  
Drawing Process ◽  
Deep Drawing Process ◽  
Test Part ◽  
Composite Fabrication ◽  
Process Characterization ◽  
Material Fracture

Commonly investigated problem on composite fabrication and forming for weight reduction in transportation and aerospace area is not completely cleared. The main difficulties on composites forming without building any defects caused new ways on process characterization due to the key parameters. In the paper two main problems were investigated, i.e. material fracture and material thinning during deep drawing. Through mechanical tests and numerical simulation the authors tried to couple the fracture with the technological boundary conditions of the deep drawing process and form a housing test part from a three-layer material.

Pore Formation and Propagation Mechanism in Porus Silicon

1991 ◽  
Vol 256 ◽  
Author(s):  
V. Lehmann ◽  
H. Cerva ◽  
U. Gosele
Keyword(s):  
Porous Structure ◽  
Space Charge ◽  
Space Charge Region ◽  
Formation Process ◽  
Quantum Confinement ◽  
Pore Formation ◽  
Propagation Mechanism ◽  
Porous Structures

ABSTRACTThis paper presents a model of the microporous silicon formation process which is based on hole depletion due to quantum confinement in the porous structure. This model is compared with the formation of larger porous structures (meso-, macroporous) where hole depletion is generated by a space charge region.

scholarly journals Cryo-EM structure of aerolysin variants reveals a novel protein fold and the pore-formation process

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Ioan Iacovache ◽  
Sacha De Carlo ◽  
Nuria Cirauqui ◽  
Matteo Dal Peraro ◽  
F. Gisou van der Goot ◽  
...  
Keyword(s):  
Formation Process ◽  
Pore Formation ◽  
Protein Fold ◽  
Novel Protein

Initial stage of pore formation process in anodic aluminum oxide template

2009 ◽  
Vol 14 (8) ◽  
pp. 1377-1382 ◽  
Author(s):  
Na Wang ◽  
Wendi Zhang ◽  
Jipeng Xu ◽  
Bin Ma ◽  
Zongzhi Zhang ◽  
...  
Keyword(s):  
Aluminum Oxide ◽  
Formation Process ◽  
Pore Formation ◽  
Anodic Aluminum Oxide ◽  
Anodic Aluminum Oxide Template ◽  
Anodic Aluminum ◽  
Initial Stage

scholarly journals The Role of the Mechanical, Structural, and Thermal Properties of Poly(l-lactide-co-glycolide-co-trimethylene carbonate) in the Development of Rods with Aripiprazole

Polymers ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 3556
Author(s):  
Artur Turek ◽  
Jakub Rech ◽  
Aleksandra Borecka ◽  
Justyna Wilińska ◽  
Magdalena Kobielarz ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Weight Loss ◽  
Thermal Properties ◽  
Pore Formation ◽  
Tensile Tests ◽  
Mechanical Tests ◽  
Lag Phase ◽  
Trimethylene Carbonate ◽  
Hot Melt

In this work, we aimed to determine the role of the mechanical, structural, and thermal properties of poly(l-lactide-co-glycolide-co-trimethylene carbonate) (P(l-LA:GA:TMC)) with shape memory in the formulation of implantable and biodegradable rods with aripiprazole (ARP). Hot melt extrusion (HME) and electron beam (EB) irradiation were applied in the formulation process of blank rods and rods with ARP. Rod degradation was carried out in a PBS solution. HPLC; NMR; DSC; compression and tensile tests; molecular weight (Mn); water uptake (WU); and weight loss (WL) analyses; and SEM were used in this study. HME and EB irradiation did not influence the structure of ARP. The mechanical tests indicated that the rods may be safely implanted using a pre-filled syringe. During degradation, no unfavorable changes in terpolymer content were observed. A decrease in the glass transition temperature and the Mn, and an increase in the WU and the WL were revealed. The loading of ARP and EB irradiation induced earlier pore formation and more intense WU and WL changes. ARP was released in a tri-phasic model with the lag phase; therefore, the proposed formulation may be administered as a delayed-release system. EB irradiation was found to accelerate ARP release.

scholarly journals Pore Formation Process of Porous Ti3SiC2 Fabricated by Reactive Sintering

Materials ◽  
2017 ◽  
Vol 10 (2) ◽  
pp. 163 ◽  
Author(s):  
Huibin Zhang ◽  
Xinli Liu ◽  
Yao Jiang
Keyword(s):  
Formation Process ◽  
Pore Formation ◽  
Reactive Sintering

Распределение напряжений при статическом растяжении цилиндрических образцов из мелко- и крупнозернистого алюминиевого сплава 6101

2021 ◽  
Vol 14 (1) ◽  
pp. 30-34
Author(s):  
Д.К. Магомедова ◽  
А.А. Чуракова
Keyword(s):  
Distribution Pattern ◽  
Static Loading ◽  
Pore Formation ◽  
Metal Structures ◽  
Contemporary World ◽  
Critical Stresses ◽  
Subsequent Fracture ◽  
Material Fracture ◽  
Strength And Durability ◽  
T Distribution

Проблема расчета прочности и долговечности различных конструкций из металлов является одной из важнейших в современном мире. Для ее решения необходимо понимание определенных механических критериев материала, таких как прочность, пластичность и др. [1, 2]. В данной работе приводятся данные расчета и указан характер распределения критических напряжений, которые определяют зарождение пор внутри материала, в данном случае в Al-6101, при статическом нагружении. Зарождение и слияние пор представляют собой первую стадию разрушения материала. При наличии данных о критических напряжениях материала можно спрогнозировать его дальнейшее разрушение [3, 4]. Calculation of strength and durability of various metal structures presents one of the most significant tasks in the contemporary world. To achieve it, the different mechanical criteria of the material, such as strength, ductility, etc. [1, 2] should be known. The calculation data and t distribution pattern of critical stresses that define formation of pores in the material (in our case, Al-6101) under static loading are presented in this article. The first phase of material fracture is the pore formation and merging. Therefore, its subsequent fracture can be estimated using the data on the critical stresses of the material [3, 4].

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