Dhaval Vartak - Academia.edu (original) (raw)

Papers by Dhaval Vartak

Research paper thumbnail of Stress Analysis of Carbon Composite Material for Space-Based RF Component Using CAE Simulation

Lecture notes in mechanical engineering, 2023

Research paper thumbnail of RF Shielding Effectiveness of Nano-composites for Space Payload Applications

Lecture notes in mechanical engineering, 2023

Research paper thumbnail of Optimization of Nano Fillers Percentage to Fabricate Electrically Conductive Carbon Fibre Reinforce Polymer for Space Use

Composites: Mechanics, Computations, Applications: An International Journal

Research paper thumbnail of A review: carbon nanotubes composite to enhance thermal & electrical properties for the space applications

Australian Journal of Mechanical Engineering

Research paper thumbnail of Carbon Nanotube Composites to Enhance Thermal and Electrical Properties for Space Applications - A Review

Journal of Environmental Nanotechnology

High specific stiffness materials are used to design the space payload components. These componen... more High specific stiffness materials are used to design the space payload components. These components should sustain the extreme environmental conditions throughout their life cycle, without failure. Space missions need lightweight materials which are mechanically strong with high thermal and electric conductivities. Carbon fiber reinforced polymer (CFRP) offers considerable mass saving and high strength, which is widely used for space payload components. However, it has limitations to replace the traditional space-qualified materials due to its low conductivity. Carbon Nanotubes (CNTs) are efficient with greater electrical and thermal conductivities. For CNTs to be seen as effective reinforcements for attaining high strength and conductivity of polymer composites, they need to meet the criteria of being well-dispersed by the solution mixing method. The quality of the CNT nanocomposite relies upon several parameters like the type of CNTs, purity, aspect ratio, amount of loading, align...

Research paper thumbnail of Hybridized Nanotubes and Graphene Oxide in CFRP Development for Space Use

Lecture Notes in Mechanical Engineering, 2022

Research paper thumbnail of Analytical Hierarchy Process Based Decision Making for Fabricating CFRP for Space Applications Using Nanomaterials

Composites: Mechanics, Computations, Applications: An International Journal

Research paper thumbnail of Embedment of Carbon Nanotubes in Carbon Fibre Reinforced Polymer for Carrier Plates in Space Payload

Journal of Environmental Nanotechnology, 2020

Research paper thumbnail of Failure Analysis of Substrate of Carrier Plate of Electromechanical Package for Space Payloads

International journal of engineering research and technology, 2014

Electromechanical packages are used for electrical interfaces between the components in the space... more Electromechanical packages are used for electrical interfaces between the components in the spacecraft system. These are designed to operate over the wide range of microwave frequencies and also with stand the stringent space and launch environment. The purpose of such a microwave package is to integrate all the components of a sub-system in such a way to minimize the size & mass and ease in accessibility of all component during testing . It provides electrical interfaces between the components in the spacecraft system and has to ensure high reliability. A typical package consists of alumina substrate mounted carrier plates, stepped cover, electronic devices which are mounted on substrates as well on base surface. Carrier plate is used as metallic carrier to support to alumina substrate on which microwave circuit is etched . Alumina substrate is of 25mil-0.635 mm thick, fragile material which is bonded by preform to carrier plate. Stress developed at various stages like manufacturin...

Research paper thumbnail of Carbon nanotube polymer composites for microwave electronics package assembly of space payload: advantages and challenges

Research paper thumbnail of Characterization of Tailored Multi-walled Carbon Nanotubes Based Composite for Geo-Space Payload Components

Journal of Electronic Materials

The intense research and development efforts in space industries leads to the design and manufact... more The intense research and development efforts in space industries leads to the design and manufacturing of carbon fiber reinforced polymer (CFRP) applications for high specific stiffness structural components. Nowadays, there is much research on replacing the traditional space qualified high-density materials. CFRP has low thermal and electrical conductivity due to the non-conductive nature of the polymer, which limits its utilization in space industries. These are essential properties for space component design. Advanced nanomaterial, multi-walled carbon nanotubes (MWCNTs) with 0.4 wt.% reinforcement in epoxy enhances the thermal and electrical conductivities by 41% and 500–625%, respectively, which is sufficient to electroplate the CFRP. Direct electroplating without surface activation on MWCNTs composite can be achieved due to enhancement of the electrical conductivity, which is not feasible in the case of neat CFRP. However, homogeneous dispersion of CNT is essential for better electroplating adhesion strength. Electroplating on CFRP components results allow us to explore the potential applications for future geo-space missions such as carrier plates and radio frequency (RF) filters. The paper explains the fabrication of the tailored CNT-CFRP composite sample and characterization that includes the properties such as thermal expansion, thermal conductivity and electrical resistance, which is a significant preceding step for any material to be space-qualified.

Research paper thumbnail of New horizons of Space Qualification of Single-Walled Carbon Nano Tubes-Carbon Fibre Reinforced Polymer Composite

Journal of Physics: Conference Series

Research paper thumbnail of Failure Analysis of Substrate of Carrier Plate of Electromechanical Package for Space Payloads

Electromechanical packages are used for electrical interfaces between the components in the space... more Electromechanical packages are used for electrical interfaces between the components in the spacecraft system. These are designed to operate over the wide range of microwave frequencies and also with stand the stringent space and launch environment. The purpose of such a microwave package is to integrate all the components of a subsystem in such a way to minimize the size & mass and ease in accessibility of all component during testing. It provides electrical interfaces between the components in the spacecraft system and has to ensure high reliability. A typical package consists of alumina substrate mounted carrier plates, stepped cover, electronic devices which are mounted on substrates as well on base surface. Carrier plate is used as metallic carrier to support to alumina substrate on which microwave circuit is etched. Alumina substrate is of 25mil-0.635 mm thick, fragile material which is bonded by preform to carrier plate. Stress developed at various stages like manufacturing, assembly, testing (due to static, dynamic & thermal loading) in carrier plate results in cracking of alumina substrate in some cases. It may ultimately fails the electromechanical package and that may lead to failure of payload and even mission may be effected. Efforts are made in the paper to analyze various stages & causes of failures of substrate which are mounted on the carrier plate.

Research paper thumbnail of Potential applications of advanced nano-composite materials for space payload

Australian Journal of Mechanical Engineering

Research paper thumbnail of Stress Analysis of Carbon Composite Material for Space-Based RF Component Using CAE Simulation

Lecture notes in mechanical engineering, 2023

Research paper thumbnail of RF Shielding Effectiveness of Nano-composites for Space Payload Applications

Lecture notes in mechanical engineering, 2023

Research paper thumbnail of Optimization of Nano Fillers Percentage to Fabricate Electrically Conductive Carbon Fibre Reinforce Polymer for Space Use

Composites: Mechanics, Computations, Applications: An International Journal

Research paper thumbnail of A review: carbon nanotubes composite to enhance thermal & electrical properties for the space applications

Australian Journal of Mechanical Engineering

Research paper thumbnail of Carbon Nanotube Composites to Enhance Thermal and Electrical Properties for Space Applications - A Review

Journal of Environmental Nanotechnology

High specific stiffness materials are used to design the space payload components. These componen... more High specific stiffness materials are used to design the space payload components. These components should sustain the extreme environmental conditions throughout their life cycle, without failure. Space missions need lightweight materials which are mechanically strong with high thermal and electric conductivities. Carbon fiber reinforced polymer (CFRP) offers considerable mass saving and high strength, which is widely used for space payload components. However, it has limitations to replace the traditional space-qualified materials due to its low conductivity. Carbon Nanotubes (CNTs) are efficient with greater electrical and thermal conductivities. For CNTs to be seen as effective reinforcements for attaining high strength and conductivity of polymer composites, they need to meet the criteria of being well-dispersed by the solution mixing method. The quality of the CNT nanocomposite relies upon several parameters like the type of CNTs, purity, aspect ratio, amount of loading, align...

Research paper thumbnail of Hybridized Nanotubes and Graphene Oxide in CFRP Development for Space Use

Lecture Notes in Mechanical Engineering, 2022

Research paper thumbnail of Analytical Hierarchy Process Based Decision Making for Fabricating CFRP for Space Applications Using Nanomaterials

Composites: Mechanics, Computations, Applications: An International Journal

Research paper thumbnail of Embedment of Carbon Nanotubes in Carbon Fibre Reinforced Polymer for Carrier Plates in Space Payload

Journal of Environmental Nanotechnology, 2020

Research paper thumbnail of Failure Analysis of Substrate of Carrier Plate of Electromechanical Package for Space Payloads

International journal of engineering research and technology, 2014

Electromechanical packages are used for electrical interfaces between the components in the space... more Electromechanical packages are used for electrical interfaces between the components in the spacecraft system. These are designed to operate over the wide range of microwave frequencies and also with stand the stringent space and launch environment. The purpose of such a microwave package is to integrate all the components of a sub-system in such a way to minimize the size & mass and ease in accessibility of all component during testing . It provides electrical interfaces between the components in the spacecraft system and has to ensure high reliability. A typical package consists of alumina substrate mounted carrier plates, stepped cover, electronic devices which are mounted on substrates as well on base surface. Carrier plate is used as metallic carrier to support to alumina substrate on which microwave circuit is etched . Alumina substrate is of 25mil-0.635 mm thick, fragile material which is bonded by preform to carrier plate. Stress developed at various stages like manufacturin...

Research paper thumbnail of Carbon nanotube polymer composites for microwave electronics package assembly of space payload: advantages and challenges

Research paper thumbnail of Characterization of Tailored Multi-walled Carbon Nanotubes Based Composite for Geo-Space Payload Components

Journal of Electronic Materials

The intense research and development efforts in space industries leads to the design and manufact... more The intense research and development efforts in space industries leads to the design and manufacturing of carbon fiber reinforced polymer (CFRP) applications for high specific stiffness structural components. Nowadays, there is much research on replacing the traditional space qualified high-density materials. CFRP has low thermal and electrical conductivity due to the non-conductive nature of the polymer, which limits its utilization in space industries. These are essential properties for space component design. Advanced nanomaterial, multi-walled carbon nanotubes (MWCNTs) with 0.4 wt.% reinforcement in epoxy enhances the thermal and electrical conductivities by 41% and 500–625%, respectively, which is sufficient to electroplate the CFRP. Direct electroplating without surface activation on MWCNTs composite can be achieved due to enhancement of the electrical conductivity, which is not feasible in the case of neat CFRP. However, homogeneous dispersion of CNT is essential for better electroplating adhesion strength. Electroplating on CFRP components results allow us to explore the potential applications for future geo-space missions such as carrier plates and radio frequency (RF) filters. The paper explains the fabrication of the tailored CNT-CFRP composite sample and characterization that includes the properties such as thermal expansion, thermal conductivity and electrical resistance, which is a significant preceding step for any material to be space-qualified.

Research paper thumbnail of New horizons of Space Qualification of Single-Walled Carbon Nano Tubes-Carbon Fibre Reinforced Polymer Composite

Journal of Physics: Conference Series

Research paper thumbnail of Failure Analysis of Substrate of Carrier Plate of Electromechanical Package for Space Payloads

Electromechanical packages are used for electrical interfaces between the components in the space... more Electromechanical packages are used for electrical interfaces between the components in the spacecraft system. These are designed to operate over the wide range of microwave frequencies and also with stand the stringent space and launch environment. The purpose of such a microwave package is to integrate all the components of a subsystem in such a way to minimize the size & mass and ease in accessibility of all component during testing. It provides electrical interfaces between the components in the spacecraft system and has to ensure high reliability. A typical package consists of alumina substrate mounted carrier plates, stepped cover, electronic devices which are mounted on substrates as well on base surface. Carrier plate is used as metallic carrier to support to alumina substrate on which microwave circuit is etched. Alumina substrate is of 25mil-0.635 mm thick, fragile material which is bonded by preform to carrier plate. Stress developed at various stages like manufacturing, assembly, testing (due to static, dynamic & thermal loading) in carrier plate results in cracking of alumina substrate in some cases. It may ultimately fails the electromechanical package and that may lead to failure of payload and even mission may be effected. Efforts are made in the paper to analyze various stages & causes of failures of substrate which are mounted on the carrier plate.

Research paper thumbnail of Potential applications of advanced nano-composite materials for space payload

Australian Journal of Mechanical Engineering