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    Disciplines / Research questions

    Manufacturing

    19 research topics · 46 questions

    Can Surface Graphene Modification Increase the Hardness and Lifespan of Diamond Tools?2 questions

    1. Quantifying the inhibition chemistry and platelet-interface mechanics of two-dimensional-material additives against iron-catalyzed wear of monocrystalline diamond tools

    2. Electrophoretically deposited graphene as a solid lubricant on microcrystalline diamond films: validating deposition kinetics, environmental durability, third-body mechanism, and the protection–counterface wear trade-off

    Singularities and bifurcations of parallel reconfigurable metamorphic robot mechanisms4 questions

    1. Generalizing the three-series-connected Bennett construction of metamorphic 6R mechanisms and deriving closed-form bifurcation-existence criteria for the induced Goldberg–Bennett families

    2. Closed-form singular-surface equations for the 3-SvPS reconfigurable parallel mechanism

    3. Higher-order bifurcation revelation for metamorphic mechanisms induced by classical overconstrained linkages: discovery of tangent-but-curvature-different bifurcations

    4. Actuation and control for reliable motion-branch reconfiguration of the Bennett plano-spherical hybrid linkage and its evolved metamorphic parallel mechanism

    Parallel Drive and Control in Ultra-Heavy Load Servo Forming Processes2 questions

    1. Extending the two-step calibration of multi-actuated servo presses with parallel topology beyond symmetry, synchronization, and purely kinematic error assumptions

    2. Production-fidelity dynamic modeling and gravity-counterbalance design for the large-capacity parallel servo press: the open further-work agenda of He, Gao, Bai and Wu (2013)

    Erosion-Wear Mechanisms and Predictive Models1 questions

    1. A physics-based erosion model for liquid–solid flows: accounting for the factor-of-five accuracy gap in CFD-based erosion prediction

    Can Large-Aperture Thin-Film Lenses Break the Optical Design "Glass Ceiling"?4 questions

    1. Preparation and space-environment qualification of optical-grade copolyamide-imide membranes with diameters beyond 400 mm for space diffractive optics

    2. Extending vacuum-assisted self-contact photolithography to multilevel, larger-aperture membrane diffractive lenses

    3. Ring-width and spectral-sampling limits for large-aperture broadband achromatic multi-level diffractive lenses

    4. Scaling multi-order diffractive engineered (MODE) lenses to the 8.5-meter Nautilus aperture: segmented fabrication, alignment, and performance validation of ultralight diffractive primary optics

    Power and performance matching in electrohydrostatic actuation systems2 questions

    1. Velocity-conforming pump-displacement regulation and coordinated design of the active load-sensitive electro-hydrostatic actuator (ALS-EHA)

    2. Systematic design and validated control of the dual-pump, accumulator gravity-balanced electro-hydrostatic actuator (EHA-VPVM) under gravity loads

    Multiscale Simulation of Composite Material Structures2 questions

    1. RVE size for random composites with local volume fraction variation: attainability of a usable finite RVE at high stiffness contrast

    2. Adaptive hybrid hierarchical/concurrent multiscale simulation of microstructural-instability-induced failure in finitely strained periodic composites: automatic critical-region identification and zoom-in criteria

    Extraction and Analysis of Weak Fault Signals in Complex High-Inertia Mechanical Systems2 questions

    1. Adaptive parameter updating of the Hellinger-distance slow feature analysis framework for incipient fault detection and diagnosis of high-speed train running gear across seasonal ambient conditions

    2. Underdamped stochastic resonance with the bistable confining potential for weak fault diagnosis of rotating machinery

    Multi-Dimensional High-Frequency Dynamic Problems and Control in Complex Electromechanical Transmission Systems1 questions

    1. Aperiodic and chaotic vibration regimes of a spur gear–roller bearing system with simultaneous time-varying bearing and mesh stiffness: characterization, parameter and initial-condition dependence, and suppression by parameter selection

    Flow Calculation in Complex Flow Fields4 questions

    1. Validity envelope of the two-eccentric-circle model for single-gamma horizontal Venturi wet gas metering beyond its validated conditions

    2. Velocity-profile corrections for single-path transit-time ultrasonic flowmeters: validity domains, the laminar-turbulent transition regime, and robust flow-rate inversion

    3. Universal wet-gas flow-rate correlation for Venturi differential-pressure meters: generalization beyond the two-phase mass flow coefficient's liquid-property, diameter-ratio, and size limits

    4. Applicability of the single-modality vortex cross-correlation wet-gas meter and its convection-coefficient model beyond the validated small-diameter, low-pressure envelope

    High-Performance Artificial Muscles2 questions

    1. Micromechanics and ambient-air operation of electrochemically driven twisted and coiled conducting-polymer yarn actuators

    2. Completing the predictive mechanics of nylon twisted and coiled polymer actuators: manufacturing coiling dynamics, actuation torque, and rate-dependent and swelling response beyond the perfect-helix quasistatic model

    Ultra-Long Lifespan Design of Nuclear Waste Storage Containers2 questions

    1. Defect-driven corrosion and predictive failure of copper-coated steel used-fuel containers over the evolving deep-repository environment

    2. A general, validated lifetime-prediction framework coupling mechanical and corrosion degradation for high-level nuclear waste disposal containers

    History and Research Progress of Mechanical Transmission Science and Technology1 questions

    1. Experimental validation, geometry-dependent loss modeling, and stage-count extension of the energy-effectiveness model for sun-gear-controlled multistage differential speed-change devices

    Online Identification of Wear States in Tribological Systems2 questions

    1. Generalizability and transferability of acoustic-emission wear-stage diagnostics across materials and operating conditions

    2. Autonomous, transferable, and mode-aware wear prediction from on-line wear-debris concentration monitoring of gearboxes

    Mechanisms for Regulating Evolution of Active Biological Tissues Induced by Friction3 questions

    1. Vertex-dependent friction and parameter identifiability in stochastic epithelial vertex models of tissue growth

    2. First-principles computation of Onsager-like degradation–healing coefficients and healing kinetics for friction-induced surface self-organization and self-healing

    3. Quantitative molecular-to-tissue basis of interfacial friction at the prechordal plate-neurectoderm interface in zebrafish gastrulation

    Mechanisms of Friction Noise Generation: A Scientific Problem Plaguing Tribology and Vibration Noise Studies for Over a Century3 questions

    1. Quantitative establishment of the detachment–reattachment mechanism of friction-induced vibration and noise in real brake systems: validation, onset thresholds, and contact-dynamics-based suppression

    2. Friction-induced vibration and noise of water-lubricated marine stern tube bearings under stochastic rough-surface excitation: integrated predictive modeling, mechanism closure, and validation

    3. Generation mechanism of railway curve squeal under non-negative damping: experimental identification and validation of the roles of vertical contact dynamics, mode coupling, and instantaneous creepage

    Issues in Spintronics Related to Friction4 questions

    1. Quantifying spin friction in atomic-scale manipulation on the noncollinear Mn/W(110) spin spiral

    2. Microscopic foundation and robustness of friction-induced spin polarization with spin-orbit coupling

    3. Spin friction of exchange-coupled local moments beyond the perturbative regime: nonlocal Gilbert damping at strong coupling, electronic criticality, and strong correlation, with retardation (inertia) and multi-orbital extensions

    4. Experimental realization of the sliding spin current in two-dimensional magnetic sliding ferroelectrics

    Fluid–structure coupled vibrations of pipes conveying fluid1 questions

    1. Dynamic thick-wall extension of the fluid–structure-interaction water-hammer model: radial inertia, external-medium coupling, and validation for very thick pipes

    Influence patterns of micro-nano structure morphology on wetting behavior4 questions

    1. Extending the validated phase-field wetting model of LIPSS-structured silicon to anisotropic roughness, hydrophobic regimes, and graded surfaces for controlled droplet transport

    2. Nanoscale wettability of hierarchical copper nanostructures: geometry-to-contact-angle design principles and the breakdown of the Wenzel model at short groove widths

    3. Critical conditions and De-pinning/Sag crossover for evaporation-driven wetting transitions of droplets on three-dimensional micropillar arrays

    4. Origin and boundaries of the sunny-side-up wetting state and the spontaneous Cassie-Wenzel collapse on silicon microcone arrays

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