scholarly journals Micro-CT based structure tensor analysis of fibre orientation in random fibre composites versus high-fidelity fibre identification methods

2020 ◽  
Vol 235 ◽  
pp. 111818 ◽  
Author(s):  
Radmir Karamov ◽  
Luca M. Martulli ◽  
Martin Kerschbaum ◽  
Ivan Sergeichev ◽  
Yentl Swolfs ◽  
...  
Keyword(s):  
Fibre Orientation ◽  
Structure Tensor ◽  
Tensor Analysis ◽  
High Fidelity ◽  
Micro Ct ◽  
Identification Methods ◽  
Fibre Composites ◽  
Random Fibre

Generation of high-fidelity random fields from micro CT images and phase field-based mesoscale fracture modelling of concrete

2021 ◽  
pp. 107762
Author(s):  
Yu-jie Huang ◽  
Hui Zhang ◽  
Bei-bei Li ◽  
Zhen-jun Yang ◽  
Jian-ying Wu ◽  
...  
Keyword(s):  
Phase Field ◽  
Random Fields ◽  
Ct Images ◽  
High Fidelity ◽  
Micro Ct

scholarly journals Characterization of continuous Hibiscus sabdariffa fibre reinforced epoxy composites

2022 ◽  
Vol 30 ◽  
pp. 096739112110609
Author(s):  
Atik Mubarak Kazi ◽  
Ramasastry DVA
Keyword(s):  
Fibre Orientation ◽  
Stress Transfer ◽  
Dynamic Mechanical Properties ◽  
Epoxy Composites ◽  
Neat Epoxy ◽  
Hibiscus Sabdariffa ◽  
Sem Images ◽  
Fibre Composites ◽  
The Matrix

The influence of fibre orientation on physical, mechanical and dynamic mechanical properties of Hibiscus sabdariffa fibre composites has been studied. The composites with longitudinal (0°), transverse (90°) and inclined (45°) fibre orientation were prepared using the hand layup technique. ASTM standards were used for characterization of continuous Hibiscus sabdariffa fibre composites. The composite with longitudinally placed fibres yields improved mechanical characteristics. The addition of longitudinal (0°) oriented continuous Hibiscus sabdariffa fibres to the epoxy enhances tensile strength by 460%, flexural strength by 160% and impact strength by 603% compared to neat epoxy. The longitudinal (0°) fibre oriented composite offers higher resistance to water absorption and thickness swelling compared to other types of composites. All continuous Hibiscus sabdariffa fibre epoxy composites possess an improved storage modulus than the neat epoxy resin. The glass transition temperature of continuous Hibiscus sabdariffa fibre composites is 8%–31% lower than that of neat epoxy. Scanning electron microscopy (SEM) images confirm the existence of voids in the matrix, fibre pullout and crack propagation near the fibre bundle, which indicates the stress transfer between fibre and matrix is non-uniform.

Enhanced Cohen class time–frequency methods based on a structure tensor analysis: Applications to ISAR processing

2013 ◽  
Vol 93 (7) ◽  
pp. 1813-1830 ◽  
Author(s):  
Vincent Corretja ◽  
Eric Grivel ◽  
Yannick Berthoumieu ◽  
Jean-Michel Quellec ◽  
Thierry Sfez ◽  
...  
Keyword(s):  
Structure Tensor ◽  
Tensor Analysis ◽  
Time Frequency ◽  
Class Time ◽  
Cohen Class
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