material compatibility
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2021 ◽  
Vol 6 (1) ◽  
pp. 4
Author(s):  
Seymur Hasanov ◽  
Suhas Alkunte ◽  
Mithila Rajeshirke ◽  
Ankit Gupta ◽  
Orkhan Huseynov ◽  
...  

Additive manufacturing has already been established as a highly versatile manufacturing technique with demonstrated potential to completely transform conventional manufacturing in the future. The objective of this paper is to review the latest progress and challenges associated with the fabrication of multi-material parts using additive manufacturing technologies. Various manufacturing processes and materials used to produce functional components were investigated and summarized. The latest applications of multi-material additive manufacturing (MMAM) in the automotive, aerospace, biomedical and dentistry fields were demonstrated. An investigation on the current challenges was also carried out to predict the future direction of MMAM processes. It was concluded that further research and development is needed in the design of multi-material interfaces, manufacturing processes and the material compatibility of MMAM parts.


Author(s):  
Seymur Hasanov ◽  
Suhas Alkunte ◽  
Mithila Rajeshirke ◽  
Ankit Gupta ◽  
Orkhan Huseynov ◽  
...  

Additive manufacturing has already been established as a highly versatile manufacturing technique with demonstrated potential to completely transform conventional manufacturing in the future. The objective of this paper is to review the latest progress and challenges associated with the fabrication of multi-material parts using additive manufacturing technologies. Various manufacturing processes and materials used to produce functional components were investigated and summarized. The latest applications of multi-material additive manufacturing (MMAM) in automotive, aerospace, biomedical and dentistry field were demonstrated. Investigation on the current challenges were also carried out to predict the future direction of MMAM processes. It is concluded that the further research and development needed in the design of multi-material interfaces, manufacturing processes and material compatibility of MMAM parts are necessary.


Author(s):  
Jimil M. Shah ◽  
Keerthivasan Padmanaban ◽  
Hrishabh Singh ◽  
Surya Duraisamy Asokan ◽  
Satyam Saini ◽  
...  

Abstract The adoption of Single-phase Liquid Immersion Cooling (Sp-LIC) for Information Technology equipment provides an excellent cooling platform coupled with significant energy savings. There are, however, very limited studies related to the reliability of such cooling technology. The Accelerated Thermal Cycling (ATC) test given ATC JEDEC is relevant just for air cooling but there is no such standard for immersion cooling. The ASTM benchmark D3455 with some appropriate adjustments was adopted to test the material compatibility because of the air and dielectric fluid differences in the heat capacitance property and corresponding ramp rate during thermal cycling. For this study, accelerated thermal degradation of the printed circuit board (PCB), passive components, and fiber optic cables submerged in air, white mineral oil, and synthetic fluid at a hoisted temperature of 45C and 35% humidity is undertaken. This paper serves multiple purposes including designing experiments, testing and evaluating material compatibility of PCB, passive components, and optical fibers in different hydrocarbon oils for single-phase immersion cooling. Samples of different materials were immersed in different hydrocarbon oils and air and kept in an environmental chamber at 45C for a total of 288 hours. Samples were then evaluated for their mechanical and electrical properties using Dynamic Mechanical Analyzer (DMA) and a multimeter, respectively. The cross-sections of some samples were also investigated for their structural integrity using SEM. The literature gathered on the subject and quantifiable data gathered by the authors provide the primary basis for this research document.


2021 ◽  
Author(s):  
Anya Seth

<p><b>Within New Zealand there is a disheartening and growing representation of youth experiencing feelings of social isolation and loneliness - an issue commonly only recognized after the culmination of its consequences occur. Those of 18-24-year olds are the cause for greatest current and future concern, yet, are the least researched age group. Architecture has the ability to influence physiological and psychological functioning, and thus may be used to positively affect wellbeing and experiences of loneliness. This thesis questions how architecture can more appropriately address experiences of social isolation and loneliness within student halls of residence in New Zealand through designing for wellbeing and atmosphere. </b></p> <p>To progress the research, this thesis implements both research for design and research through design. Research for design is utilized to provide a context for social isolation and loneliness in relation to wellbeing, as well as a theoretical context for atmosphere within architecture. Wellbeing and atmosphere are subsequently utilized as a framework to assess the case studies through how they support the senses, connection, surrounding objects, levels of intimacy, and material compatibility. Research through design is then utilized at two differing scales that increase in complexity, whereby each design is informed by the prior to test the practical and theoretical understanding of wellbeing and atmosphere. The first scale, a residential hall of residence, explores how wellbeing and atmosphere may be generated for a small group of people. The second scale and outcome, a public scale university hall of residence, expresses how wellbeing and atmosphere may be generated for a large group of people. Ultimately, this thesis concludes that through appropriately addressing the senses, connection, material compatibility, levels of intimacy, and surrounding objects the experience of social isolation and loneliness in student halls of residence may be improved.</p>


2021 ◽  
Author(s):  
Anya Seth

<p><b>Within New Zealand there is a disheartening and growing representation of youth experiencing feelings of social isolation and loneliness - an issue commonly only recognized after the culmination of its consequences occur. Those of 18-24-year olds are the cause for greatest current and future concern, yet, are the least researched age group. Architecture has the ability to influence physiological and psychological functioning, and thus may be used to positively affect wellbeing and experiences of loneliness. This thesis questions how architecture can more appropriately address experiences of social isolation and loneliness within student halls of residence in New Zealand through designing for wellbeing and atmosphere. </b></p> <p>To progress the research, this thesis implements both research for design and research through design. Research for design is utilized to provide a context for social isolation and loneliness in relation to wellbeing, as well as a theoretical context for atmosphere within architecture. Wellbeing and atmosphere are subsequently utilized as a framework to assess the case studies through how they support the senses, connection, surrounding objects, levels of intimacy, and material compatibility. Research through design is then utilized at two differing scales that increase in complexity, whereby each design is informed by the prior to test the practical and theoretical understanding of wellbeing and atmosphere. The first scale, a residential hall of residence, explores how wellbeing and atmosphere may be generated for a small group of people. The second scale and outcome, a public scale university hall of residence, expresses how wellbeing and atmosphere may be generated for a large group of people. Ultimately, this thesis concludes that through appropriately addressing the senses, connection, material compatibility, levels of intimacy, and surrounding objects the experience of social isolation and loneliness in student halls of residence may be improved.</p>


2021 ◽  
Author(s):  
Chenrui Mao ◽  
Yu Ji ◽  
Jun Sun ◽  
Zhaoyu Liang ◽  
Lei Shi

Abstract Nuclear Thermal Propulsion (NTP) for deep space exploration is promising. Hydrogen is employed as the propellant to enhance the maximized specific impulse of NTP. Whereas, the low boiling point and density of hydrogen lead to several issues related to safety and storage. From the perspective of reactor physics, thermal hydraulics, material compatibility, and experience in the aerospace field, ammonia (NH3) is the alternative propellant to replace hydrogen. To analyze the specific impulse and system parameters of ammonia NTP, the hydrogen expander cycle NTP system analysis program PANES (Program for Analyzing Nuclear Engine Systems) is improved. The thermophysical properties library of ammonia has been increased in PANES. Based on the same thrust with hydrogen NTP, the design and analysis of ammonia NTP systems are carried out. This paper improves the PANES program and calculates the NTP performance parameters for potential alternative propellant ammonia, which provides a reference for the design of ammonia NTP system.


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