A5039025948- Mechanical Behavior of Composites
- Fiber-reinforced polymer composites
- Composite Material Mechanics
- Epoxy Resin Curing Processes
- Numerical methods in engineering
- Structural Behavior of Reinforced Concrete
- Smart Materials for Construction
- Fatigue and fracture mechanics
- Advanced Fiber Optic Sensors
- Composite Structure Analysis and Optimization
- Ultrasonics and Acoustic Wave Propagation
- Advanced ceramic materials synthesis
- Structural Health Monitoring Techniques
- Textile materials and evaluations
- High-Velocity Impact and Material Behavior
- Fluid Dynamics Simulations and Interactions
- Additive Manufacturing and 3D Printing Technologies
- Carbon Nanotubes in Composites
- Graphene research and applications
- Metal Forming Simulation Techniques
- Photonic and Optical Devices
- Material Properties and Applications
- Innovations in Concrete and Construction Materials
- Synthesis and properties of polymers
- Polymer crystallization and properties
Tohoku University
2016-2025
National Institute for Materials Science
2022-2025
University of Washington
2018-2025
Tohoku Institute of Technology
2023-2025
Seattle University
2021
Toray (United States)
2016
Japan Aerospace Exploration Agency
2012
The University of Tokyo
2000-2006
National Institute of Advanced Industrial Science and Technology
2001-2006
Nagoya University
2004-2005
Abstract The mechanisms underlying the influence of surface chemistry inorganic materials on polymer structures and fracture behaviours near adhesive interfaces are not fully understood. This study demonstrates first clear direct evidence that molecular segregation cross-linking epoxy resin driven by intermolecular forces at surfaces alone, which can be linked directly to failure mechanisms. We prepare between silicon substrates with varying chemistries (OH H terminations) a smoothness below...
A micro-scale simulation scheme is developed in this study to evaluate in-situ damage and strength properties of CFRP laminates with various ply thicknesses. To capture both the initiation propagation transverse cracks, microscopic random fiber configuration constraint effect from neighboring plies should be carefully considered. This considers representative volume element (RVE), consisting ‘inhomogeneous’ which solid elements individually modeled matrix, ‘homogenized’ plies, homogeneously...
Abstract Epoxy‐amine thermosetting resins undergo different reactions depending on the amine/epoxy stoichiometric ratio ( r ). Although many desirable properties can be achieved by varying ratio, effects of variation crosslinked structure and mechanical contribution these factors to ductility materials have not been fully elucidated. This study investigates brittle‐ductile behavior epoxies with various ratios performs curing simulations using molecular dynamics (MD) evaluate structures. The...
Epoxy resins are widely used as matrix resins, especially for carbon-fiber-reinforced plastic, due to their outstanding physical and mechanical properties. To date, most research into cross-linking processes using simulation has considered only a distance-based criterion judge the probability of reaction. In this work, new algorithm was developed use with large-scale atomic/molecular massively parallel simulator (LAMMPS) package study process; approach combines both several kinetic criteria...
Multiscale modeling, comprising quantum-chemical reaction path calculation, curing molecular dynamics (MD) simulation, microscopic finite-element analysis (FEA), and macroscopic FEA, was developed to predict the manufacturing-process-induced deformation of carbon-fiber-reinforced plastic (CFRP) laminates. In this approach, thermomechanical properties, volumetric shrinkage due reaction, gelation point matrix thermoset resin were evaluated using MD simulations coupled with quantum...
The effectiveness of multiscale modeling, consisting quantum chemical reaction path calculations, molecular dynamics simulations, and microscopic macroscopic finite element analysis, developed for the process-induced residual deformation carbon fiber-reinforced plastic was experimentally evaluated. In this study, non-crimp fabric composites with an arbitrary thermoset resin were fabricated, measured. Process-induced deformations due to cure shrinkage thermal cross-ply laminates under...
Thermoplastic carbon fiber-reinforced plastics (CFRPs) are increasingly utilized in the aerospace industry owing to their beneficial properties and enhanced formability relative thermoset CFRPs. Despite extensive use of these materials, studies focusing on compression after impact (CAI) tests with energies exceeding 20 J for thermoplastic CFRPs remain scarce. This study examines CAI quasi-isotropic laminates CFRP, subjected a low-velocity energy 27.04 J. For comparison, CFRP were 36.5 These...
Reaction-induced phase separation occurs during the curing reaction when a thermoplastic resin is dissolved in thermoset resin, which enables toughening of resin. As properties vary significantly depending on morphology phase-separated structure, controlling formation critical importance. phenomenon that ranges from chemical scale to mesoscale dynamics polymer molecules. In this study, we performed simulations using dissipative particle (DPD) coupled with model reproduce reaction-induced...