Improved mechanical performance and unique toughening mechanisms of UDM processed epoxy‐SiO 2 nanocomposites

2021 ◽  
Author(s):  
Kaushal Kumar ◽  
Manjeet S. Goyat ◽  
Ankur Solanki ◽  
Arun Kumar ◽  
Ravi Kant ◽  
...  
Keyword(s):  
Mechanical Performance ◽  
Toughening Mechanisms

The effect of rubber functionality on the phase morphology, mechanical performance and toughening mechanisms of highly toughened PP/PA6/EPDM ternary blends

2019 ◽  
Vol 79 ◽  
pp. 106018 ◽  
Author(s):  
Maryam Hasanpour ◽  
M. Mehrabi Mazidi ◽  
Mir Karim Razavi Aghjeh
Keyword(s):  
Mechanical Performance ◽  
Phase Morphology ◽  
Ternary Blends ◽  
Toughening Mechanisms

scholarly journals Toughening mechanisms in bioinspired multilayered materials

2015 ◽  
Vol 12 (102) ◽  
pp. 20140855 ◽  
Author(s):  
Sina Askarinejad ◽  
Nima Rahbar
Keyword(s):  
Mechanical Performance ◽  
Micromechanical Model ◽  
Organic Matrix ◽  
Theoretical Strength ◽  
Nonlinear Behaviour ◽  
Toughening Mechanisms ◽  
Highly Nonlinear ◽  
Multilayered Material ◽  
Multilayered Materials ◽  
Nanoscale Features

Outstanding mechanical properties of biological multilayered materials are strongly influenced by nanoscale features in their structure. In this study, mechanical behaviour and toughening mechanisms of abalone nacre-inspired multilayered materials are explored. In nacre's structure, the organic matrix, pillars and the roughness of the aragonite platelets play important roles in its overall mechanical performance. A micromechanical model for multilayered biological materials is proposed to simulate their mechanical deformation and toughening mechanisms. The fundamental hypothesis of the model is the inclusion of nanoscale pillars with near theoretical strength ( σ th ~ E /30). It is also assumed that pillars and asperities confine the organic matrix to the proximity of the platelets, and, hence, increase their stiffness, since it has been previously shown that the organic matrix behaves more stiffly in the proximity of mineral platelets. The modelling results are in excellent agreement with the available experimental data for abalone nacre. The results demonstrate that the aragonite platelets, pillars and organic matrix synergistically affect the stiffness of nacre, and the pillars significantly contribute to the mechanical performance of nacre. It is also shown that the roughness induced interactions between the organic matrix and aragonite platelet, represented in the model by asperity elements, play a key role in strength and toughness of abalone nacre. The highly nonlinear behaviour of the proposed multilayered material is the result of distributed deformation in the nacre-like structure due to the existence of nano-asperities and nanopillars with near theoretical strength. Finally, tensile toughness is studied as a function of the components in the microstructure of nacre.

The Mechanical Performance of Carbon Fibres- Addressing the Role of Microstructure

2019 ◽  
Author(s):  
Peter Peter ◽  
Claudia Creighton ◽  
David Fox ◽  
Pablo Mota Santiago ◽  
Adrian Hawley ◽  
...  
Keyword(s):  
Mechanical Performance ◽  
Carbon Fibres

Microstructural and Mechanical Behaviour Evaluation of Mg-Al-Zn Alloy Friction Stir Welded Joint

2020 ◽  
Vol 17 (3) ◽  
pp. 8150-8159
Author(s):  
Kulwant Singh ◽  
Gurbhinder Singh ◽  
Harmeet Singh
Keyword(s):  
Heat Treatment ◽  
Friction Stir Welding ◽  
Magnesium Alloys ◽  
Mechanical Performance ◽  
Fuel Efficiency ◽  
Research Work ◽  
Grain Structure ◽  
Tensile Fracture ◽  
Friction Stir ◽  
The Impact

The weight reduction concept is most effective to reduce the emissions of greenhouse gases from vehicles, which also improves fuel efficiency. Amongst lightweight materials, magnesium alloys are attractive to the automotive sector as a structural material. Welding feasibility of magnesium alloys acts as an influential role in its usage for lightweight prospects. Friction stir welding (FSW) is an appropriate technique as compared to other welding techniques to join magnesium alloys. Field of friction stir welding is emerging in the current scenario. The friction stir welding technique has been selected to weld AZ91 magnesium alloys in the current research work. The microstructure and mechanical characteristics of the produced FSW butt joints have been investigated. Further, the influence of post welding heat treatment (at 260 °C for 1 h) on these properties has also been examined. Post welding heat treatment (PWHT) resulted in the improvement of the grain structure of weld zones which affected the mechanical performance of the joints. After heat treatment, the tensile strength and elongation of the joint increased by 12.6 % and 31.9 % respectively. It is proven that after PWHT, the microhardness of the stir zone reduced and a comparatively smoothened microhardness profile of the FSW joint obtained. No considerable variation in the location of the tensile fracture was witnessed after PWHT. The results show that the impact toughness of the weld joints further decreases after post welding heat treatment.

NUMERICAL STUDY ON THE MECHANICAL PERFORMANCE OF GRAPHENE BRIDGES ON SILLICON THIN FILM TRANSISTORS

2011 ◽  
Author(s):  
Byung-Jae Kim ◽  
Hyeon-Seok Seo ◽  
Won-Ho Lee ◽  
Jong-Hyun Ahn ◽  
Youn-Jea Kim
Keyword(s):  
Thin Film ◽  
Thin Film Transistors ◽  
Mechanical Performance ◽  
Numerical Study

Effect of tolbutamide on myocardial metabolism and mechanical performance of the diabetic rat

Diabetes ◽  
1984 ◽  
Vol 33 (12) ◽  
pp. 1138-1143 ◽  
Author(s):  
B. H. Tan ◽  
G. L. Wilson ◽  
S. W. Schaffer
Keyword(s):  
Myocardial Metabolism ◽  
Mechanical Performance ◽  
Diabetic Rat

MARBLE FILLERS EFFECT ON THE MECHANICAL PERFORMANCE OF A RECYCLED AGGREGATE CONCRETE

2017 ◽  
Vol 16 (1) ◽  
pp. 197-204 ◽  
Author(s):  
Larbi Belagraa ◽  
Miloud Beddar ◽  
Abderrazak Bouzid
Keyword(s):  
Mechanical Performance ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Aggregate Concrete
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