scholarly journals Design of a 3D composite structure considering data uncertainties and various failure mechanisms

PAMM ◽  
2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Martin Drieschner ◽  
Yuri Petryna ◽  
Lukas Eichner
Keyword(s):  
Composite Structure ◽  
Failure Mechanisms ◽  
3D Composite

A novel 3D composite structure with tunable Poisson's ratio and stiffness

2015 ◽  
Vol 252 (7) ◽  
pp. 1565-1574 ◽  
Author(s):  
Xiaonan Hou ◽  
Hong Hu
Keyword(s):  
Composite Structure ◽  
Poisson’S Ratio ◽  
Poisson's Ratio ◽  
3D Composite

A 3D-composite structure of FeP nanorods supported by vertically aligned graphene for the high-performance hydrogen evolution reaction

2017 ◽  
Vol 5 (22) ◽  
pp. 11301-11308 ◽  
Author(s):  
Dongqi Li ◽  
Qingyu Liao ◽  
Bowen Ren ◽  
Qiuyan Jin ◽  
Hao Cui ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Composite Structure ◽  
High Performance ◽  
Graphene Nanosheets ◽  
Vertically Aligned ◽  
3D Composite

A 3D-composite structure of FeP nanorods on vertically aligned graphene nanosheets has been fabricated for the high-performance hydrogen evolution reaction.

Mesomechanical analysis of the ELASTO-PLASTIC behavior of a 3D composite-structure under tension

2005 ◽  
Vol 36 (6) ◽  
pp. 475-483 ◽  
Author(s):  
V. A. Romanova ◽  
E. Soppa ◽  
S. Schmauder ◽  
R. R. Balokhonov
Keyword(s):  
Composite Structure ◽  
Plastic Behavior ◽  
3D Composite

Damping Analysis of 3D Composite Structure Embedded with Visco-Elastic Layer

2011 ◽  
Vol 383-390 ◽  
pp. 2719-2722 ◽  
Author(s):  
Muhammad Iqbal Sabir ◽  
Er Bao Liu ◽  
Wan Tao Guo ◽  
Zhen Li ◽  
Li Li
Keyword(s):  
Composite Structure ◽  
Elastic Layer ◽  
Composite Structures ◽  
Transient Analysis ◽  
Dynamic Behaviour ◽  
Fatigue Loading ◽  
Resonant Vibrations ◽  
Reinforced Composite ◽  
3D Composite ◽  
Damping Capability

Recently, the fiber reinforced composite embedded with visco-elastic layer has received great attention because of its good damping capability. Damping is an important feature for dynamic behaviour of composite structures, which alleviates the resonant vibrations and thus prolongs the service life of structures under fatigue loading or impact. The present paper deals with the dynamic response of a 3D composite structure embedded with visco-elastic layer. The modal analysis, harmonic analysis and transient analysis are carried out respectively. The amplitude of z-displacement of a specific node on the bottom reduces quickly due to the high damping of the visco-elastic layer.

Multiscale Modeling of Hybrid Composite Structures

2011 ◽  
Vol 471-472 ◽  
pp. 916-921 ◽  
Author(s):  
Milan Růžička ◽  
Jiří Had ◽  
Viktor Kulíšek ◽  
Ondřej Uher
Keyword(s):  
Multiscale Modeling ◽  
Cross Sections ◽  
Composite Structure ◽  
Hybrid Composite ◽  
Composite Structures ◽  
Unidirectional Composite ◽  
Scale Model ◽  
Practical Applications ◽  
Macro Scale ◽  
3D Composite

A novel type of hybrid composite structure has been developed, experimentally investigated and used for many practical applications. The main supporting elements of composite structures are formed by the stamping process of partially cured and axially-oriented carbon fibre rods. This system can fill relatively thick parts of cross sections of beams without risk of delamination. Typical macroscopic sub-cells are formed in the transversal cross section of the part due to this technology. An advantage of this final 3D composite structure is its high shear strength and stiffness in comparison with thick unidirectional composite parts. To absorb the dynamic energy and increase the damping, a rubber-cork layer can be inserted during production, before the final pressing and curing of the whole part. The final stiffness property of the whole 3D composite is obtained from multiscale modeling. It is based on an averaging process and a homogenization technique in FEA. A parametric study was carried out to determine the influence of the size, orientation and thickness of the cell border winding layer on the components of the global elastic material matrix. A comparison of a numerical analysis prediction with experimental results shows acceptable agreement of the elastic modules. A mezzo scale model can be applied for designing a real part on a macro scale.

scholarly journals LSPR optical fiber biosensor based on a 3D composite structure of gold nanoparticles and multilayer graphene films

2020 ◽  
Vol 28 (5) ◽  
pp. 6071 ◽  
Author(s):  
Can Li ◽  
Zhen Li ◽  
Shuanglu Li ◽  
Yanan Zhang ◽  
Baoping Sun ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Optical Fiber ◽  
Composite Structure ◽  
Multilayer Graphene ◽  
Graphene Films ◽  
3D Composite

On the role of tin underlays for the prevention of thermal grooving in thin gold films

1986 ◽  
Vol 44 ◽  
pp. 732-733
Author(s):  
Jin Young Kim ◽  
R. E. Hummel ◽  
R. T. DeHoff
Keyword(s):  
Thin Film ◽  
Free Surface ◽  
Grain Boundary ◽  
Beneficial Effect ◽  
Failure Mechanism ◽  
Failure Mechanisms ◽  
Distinct Advantage ◽  
Gold Films ◽  
Gold Thin Film

Gold thin film metallizations in microelectronic circuits have a distinct advantage over those consisting of aluminum because they are less susceptible to electromigration. When electromigration is no longer the principal failure mechanism, other failure mechanisms caused by d.c. stressing might become important. In gold thin-film metallizations, grain boundary grooving is the principal failure mechanism.Previous studies have shown that grain boundary grooving in gold films can be prevented by an indium underlay between the substrate and gold. The beneficial effect of the In/Au composite film is mainly due to roughening of the surface of the gold films, redistribution of indium on the gold films and formation of In2O3 on the free surface and along the grain boundaries of the gold films during air annealing.

Real-time cryo-deformation of polypropylene and impact-modified polypropylene in the transmission electron microscope

1993 ◽  
Vol 51 ◽  
pp. 892-893
Author(s):  
Robert C. Cieslinski ◽  
H. Craig Silvis ◽  
Daniel J. Murray
Keyword(s):  
Electron Microscope ◽  
Transmission Electron Microscope ◽  
Failure Mechanisms ◽  
Brittle Transition ◽  
Molded Part ◽  
Transmission Electron ◽  
Solvent Cast ◽  
The Impact ◽  
Annealed Copper ◽  
Dynamic Plane

An understanding of the mechanical behavior polymers in the ductile-brittle transition region will result in materials with improved properties. A technique has been developed that allows the realtime observation of dynamic plane stress failure mechanisms in the transmission electron microscope. With the addition of a cryo-tensile stage, this technique has been extented to -173°C, allowing the observation of deformation during the ductile-brittle transition.The technique makes use of an annealed copper cartridge in which a thin section of bulk polymer specimen is bonded and plastically deformed in tension in the TEM using a screw-driven tensile stage. In contrast to previous deformation studies on solvent-cast films, this technique can examine the frozen-in morphology of a molded part.The deformation behavior of polypropylene and polypropylene impact modified with EPDM (ethylene-propylene diene modified) and PE (polyethylene) rubbers were investigated as function of temperature and the molecular weight of the impact modifier.

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