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  • Springer  (868)
  • Institute of Physics (IOP)  (18)
  • 1
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    Development of a Support Bump for Increasing the Energy Absorption of a Jounce Bump (2018)
    Institute of Physics (IOP)
    Details
    Publication Date: 2018-10-20
    Description: In this study, we developed a support bump to increase the energy absorption of the jounce bump. The support bump is made of TPE material, and the jounce bump is made of TPU material. The support and jounce bump each verified the simulation model using the load deflection test. The developed support and jounce bump were satisfied with the durability test. The support bump was assembled with the jounce bump and confirmed that the energy absorption amount was increased compared with the single jounce bump. Finally, we verified the validity of the simulation by comparing the load deflection data under the same conditions as the test using the verified the support and jounce bump simulation model.
    Print ISSN: 1757-8981
    Electronic ISSN: 1757-899X
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Institute of Physics (IOP)
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  • 2
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    Nano-crystal formation of Mg-Cu-Gd amorphous ribbon deformed by forced cold rolling (2014)
    Institute of Physics (IOP)
    Details
    Publication Date: 2014-08-09
    Description: Structural and devitrification behaviors of selected Mg-based amorphous alloys have been investigated for the Mg-Cu-Gd amorphous ribbon fabricated by repeated forced cold rolling. When amorphous ribbons were cold- rolled up to a thickness ratio of ~ 50%, the heat of crystallization (AHx) exhibited a reduction. In order to identify devitrification manner of the amorphous alloys, in-situ TEM (Transmission Electron Microscope) observations up to 623 K have been carried out for the as-fabricated ribbon and cold-rolled ribbon at 10 K temperature interval from 423 K. The nano-crystallization behaviors and mechanism of Mg-Cu-Gd alloy ribbon are discussed in terms of TEM observations and kinetic analysis.
    Print ISSN: 1757-8981
    Electronic ISSN: 1757-899X
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Institute of Physics (IOP)
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  • 3
    Electronic Resource
    Electronic Resource
    On the realization of reliability functions of probabilistic communication networks (1968)
    Springer
    Journal of engineering mathematics 2 (1968), S. 39-51 
    Details
    ISSN: 1573-2703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Technology
    Notes: Abstract This paper presents some properties and interrelationships of terminal reliability functions of probabilistic communication networks with distinct element reliabilities. Based on topological techniques a synthesis procedure as well as realizability conditions are given. In addition, a uniqueness theorem is proved.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01534958
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    Paper (German National Licenses)
    Fulltext
  • 4
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    Effects of Preform Densification on Near-Net Shaping of NITE-SiC/SiC Composites (2011)
    Institute of Physics (IOP)
    Details
    Publication Date: 2011-09-22
    Description: Large volumetric shrinkage (~50 Vol%) occurs during ceramic matrix composites fabrication by hot-pressing due to infiltration and densification process of powder for matrix formation, resulting in unfortunately significant fiber-architecture and -strength damage. This study tries to explore damage-less near-net shaping technique by preform densification before hot-pressing in Nano-Infiltration and Transient Eutectic-phase (NITE) process. In particular, effects of preform densification for the damage-less near-net shaping, important influencing elements such as fiber-architecture, microstructural integrity and homogeneity, and composite's mechanical properties were evaluated using simple shaped (plate) and complex shaped composites. The preform densification demonstrated protective fiber-architecture in complex shaped composites and enhanced composites' density to 2.77/cm 3 and ultimate bending strength to ~200 MPa in simple shaped composites, owing to significantly red...
    Print ISSN: 1757-8981
    Electronic ISSN: 1757-899X
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 5
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    Microstructure and Property Changes of SiC Fiber under Thermal and Ion Irradiation Environments (2011)
    Institute of Physics (IOP)
    Details
    Publication Date: 2011-09-15
    Description: Although, SiC/SiC composites are very attractive for applications at high-temperature including advanced nuclear fusion/fission plants, their high material cost has been one of biggest issues to be utilized. In the neutron irradiation environments, high crystallinity of SiC fibers and matrix is essential to stabilize the mechanical properties, but the expensive crystallized SiC fibers may enhance the cost of material. As a potential option from the cost down aspect, utilization of amorphous SiC fibers was planned. This paper concerns about the radiation damage tolerance of SiC/SiC with amorphous SiC fibers as starting reinforcing fibers. The crystallization procedure of amorphous SiC fibers was investigated during thermal treatments, and a new NITE-SiC/SiC, called as IC-NITE (IC stands for "in-situ" crystallized), composite was produced. Its radiation damage behaviour and microstructural stability were examined by a heavy ion irradiation experiment and TEM.
    Print ISSN: 1757-8981
    Electronic ISSN: 1757-899X
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 6
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    Industrialization of Advanced SiC/SiC Composites and SiC Based Composites; Intensive activities at Muroran Institute of Technology under OASIS (2011)
    Institute of Physics (IOP)
    Details
    Publication Date: 2011-09-22
    Description: Organization of Advanced Sustainability Initiative for Energy System/Material ( OASIS ), at Muroran Institute of Technology is now intensively enforcing its efforts for industrialization of advanced SiC/SiC composites and SiC based composites by fabrication system integration of NITE method. This paper provides the brief review of the activities at OASIS, where prototype production line of green sheets and prepreg sheets are under installation. The near-net shaped preforms with the NITE green-sheets and prepreg-sheets are made into near-net shape components for potential applications under consideration by HIP and Pseudo-HIP. Aiming at the near term utilization, SiC/SiC hybrid structures with metallic materials, such as steels and other refractory metals, were fabricated with promising results. Trial to reduce the production cost has been continued.
    Print ISSN: 1757-8981
    Electronic ISSN: 1757-899X
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 7
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    Fabrication of Environmentally Resistant NITE-SiC/SiC Composites (2011)
    Institute of Physics (IOP)
    Details
    Publication Date: 2011-09-22
    Description: NITE-SiC, SiC/SiC qualification of environmental resistance in various conditions is on-going toward early utilization in advanced energy and aero-space systems. Multi-layered SiC/SiC composites for preventing environmental attacks to pyrocarbon interphase was provided. Thermal exposure test in air and liquid metal(Pb and Li-Pb) compatibility test were carried out. It was confirmed the significant loss of PyC interphase in SiC/SiC composites. In case of Li-Pb-layered SiC/SiC composites, an attack of air and liquid metal has been sucessfuly supressed by surface SiC layer
    Print ISSN: 1757-8981
    Electronic ISSN: 1757-899X
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Institute of Physics (IOP)
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  • 8
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    SiC/SiC and W/SiC/SiC Composite Heater by NITE-method for IFMIF and Fission Reactor Irradiation Rigs (2011)
    Institute of Physics (IOP)
    Details
    Publication Date: 2011-09-15
    Description: For nuclear and fusion materials R&D, high dose neutron irradiation at very high temperature is one of the most important and challenging techniques. As the part of Japan/EU Broader Approach (BA) program for fusion, International Fusion Materials Irradiation Facility/Engineering Validation and Engineering Design Activities (IFMIF/EVEDA) project is on-going. Where, High Flux Test Module (HFTM) design aiming up to 1000°C has been intensively investigated. Innovative SiC/SiC and tungsten embedded SiC/SiC (W/SiC/SiC) heaters have been recognized potential and promising candidates. These heaters were fabricated successfully by NITE method and were evaluated. The SiC/SiC heater showed weak temperature dependence up to 1000°C on in-plane electrical conductivity. Irradiation capsule for heater performance evaluation under neutron irradiation in Belgian Reactor 2 (BR2) is also under preparation. The results of heater performance and basic properties evaluation and of underlying micro...
    Print ISSN: 1757-8981
    Electronic ISSN: 1757-899X
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Institute of Physics (IOP)
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  • 9
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    3Microcanonical entropy as a function of energies for the Triangular-Lattice Blume-Capel magnetic system (2016)
    Institute of Physics (IOP)
    Details
    Publication Date: 2016-09-27
    Description: The triangular-lattice Blume-Capel magnetic system is investigated using efficient Wang-Landau Monte Carlo algorithm. From extensive Wang-Landau Monte Carlo simulations with massive large-scale computing, the microcanonical entropy as a function of energy variables, the most fundamental quantity in statistical thermodynamics, for the triangular- lattice Blume-Capel ferromagnet and antiferromagnet at the same time is evaluated for the first time. The important properties of the microcanonical entropy as a function of energy variables are discussed for the triangular-lattice Blume-Capel magnetic system.
    Print ISSN: 1755-1307
    Electronic ISSN: 1755-1315
    Topics: Geography , Geosciences , Physics
    Published by Institute of Physics (IOP)
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  • 10
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    Development of a predictive system for SLM product quality (2017)
    Institute of Physics (IOP)
    Details
    Publication Date: 2017-08-06
    Description: Recently, layer by layer manufacturing or additive manufacturing (AM) has been used in many application fields. Selective laser melting (SLM) is the most attractive method for building layer by layer from metallic powders. However, applications of AM in general and SLM in particular to industry have some barriers due to the quality of the manufactured parts which are affected by the high residual stresses and large deformation. SLM process is characterized by high heat source and fast solidification which lead to large thermal stress. The aim of this research is to develop a system for predicting the printed part quality during SLM process by simulation in consideration of the temperature distribution on the workpiece. For carrying out the system, model for predicting the temperature distribution was established. From this model, influences of process parameters to temperature distribution were analysed. The thermal model in consideration of relationship among printing parameter...
    Print ISSN: 1757-8981
    Electronic ISSN: 1757-899X
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Institute of Physics (IOP)
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