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Showing 1 to 16 of 16 for “"interfacial debonding"”.
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Interfacial debonding from a sandwiched elastomer layer
… products. A common requirement is that the debonding of the elastomeric layer from the adherends be controlled to avoid undesirable failure modes. This level of control may necessitate understanding the collective role of the interfacial adhesion, material properties, part geometries, and …
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Early Age Behavior of Bonded Concrete Overlays Due to Shrinkage and Thermal Changes
… The design guide calculates surface stresses and interfacial debonding stress due to shrinkage and thermal changes at early age. An engineer can use the design guide to study the interaction of material properties, environmental conditions, structural restraints, and overlay geometry.
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Development of Micro and Nanostructured Materials for Interfacial Self -Healing
… are used to test virgin and healed fiber-matrix interfacial shear strength. When damage initiates at the fiber-matrix interface, the attached capsules rupture, and healing agent is released into the crack plane where it contacts the Grubbs' catalyst to initiate polymerization. Up to 44% recovery …
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Nondestructive evaluation of composite rods using ultrasonic wave propagation
… at structural interfaces, assessments of interfacial debonding will be explored and the presence of anomalous materials can be demonstrated. The resulting graphical presentations will be compiled and should provide the basis for material characterizations and assessments of structural …
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Development of Carbon Nanofiber Reinforced HNBR Composite for Sealing Applications
… and microstructure analysis show that interfacial debonding happens in the hybrid-filler composites. The results indicated that the compatibility of CNF and conventional fillers is good and the modulus achieves highest at the cost of low elongation at certain ratio.
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Micromechanics of the Hydrogen Effect on Plasticity and Interfacial Decohesion
… of hydrogen is suggested and implemented through interfacial cohesive finite elements to study interfacial debonding around an elastic particle imbedded in an elastoplastically deforming matrix, while transient hydrogen transport takes place in the matrix, the particle, and the opening interfacial …
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Moisture degradation in FRP bonded concrete systems : an interface fracture approach
… form a synergistic analysis of the mechanistic debonding behavior affected by moisture. Results have shown that moisture affected debonding is a highly complex phenomenon that involves physical changes in the bond as well as in its constituent materials. In particular, moisture can initially …
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X-ray Micro-Computed Tomography and Deep Learning Segmentation of Progressive Damage in Hierarchical Nanoengineered Carbon Fiber Composites
… fiber bundle microbuckling, and fiber/matrix interfacial debonding. Two emerging solutions aiming to suppress or delay such mechanisms toward enhanced strength and stiffness are considered in this dissertation: (i) aligned carbon nanotube (A-CNT) interlaminar reinforcement (termed …
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Analysis of matrix damage in single fiber composites
… interface w ill debond depending on the interfacial strength. This damage of the fiber or the matrix would eventually lead to the ultimate failure of the composite. Hence it is essential to analyze the stresses and energies associated with an unidirectional composite containing matrix …
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Particulate composite material internal deformation measurements using x-ray microtomography and digital volume correlation
… and failure evolution as a function of loading. Interfacial debonding was the only failure mode seen in these model composites and was studied quantitatively and qualitatively for the simpler microstructure configurations of a single embedded spherical inclusion or two inclusions one above each …
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Debonding in bi-layer material systems under moisture effect : a multiscale approach
… and the constitutive materials. In particular, interfacial delamination has been observed as a major integrity issue. In this research, a comprehensive investigation on the interfacial debonding mechanism has been conducted both computationally and experimentally using an epoxy-silica system. In …
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Novel polypropylene based microporous membranes via spherulitic deformation
… agent to reduce spherulite sizes and utilizing interfacial debonding between two different phases to enhance permeability. A highly methanol permeable membrane with an estimated porosity of 0.29 was produced with the nucleated polypropylene samples, and a reasonable permeability was also …
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Self-healing laminated composites from prepreg fabrics
… first creates matrix cracks and fiber/matrix interfacial debonding near the off-axis fibers and evolve into fiber failures and delaminations. Therefore, failure of the FRP composite can be retarded by repairing microscale flaws at the initial stage. Self-healing materials have been developed …
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Modeling the effect of debonding on the constitutive response of heterogeneous materials
… of the matrix; and fracture of the particle. Interfacial debonding is often a precursor to the other failure processes and plays a key role in the constitutive response of solid propellant, a compliant elastomeric matrix containing a high volume fraction of stiff particles. These particles …
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Failure processes in soft and quasi-brittle materials with nonhomogeneous microstructures
… topic we investigate considers the influence of interfacial interactions on the macroscopic constitutive response of particle reinforced elastomers. When a particle is embedded into an elastomer, the polymer chains in the elastomer tend to adsorb (or anchor) onto the surface of the particle; …
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Crack path selection and shear toughening effects due to mixed mode loading and varied surface properties in beam-like adhesively bonded joints
… loading modes, or uncertainties in material/interfacial properties are involved. From a mechanics perspective, areas of current interest include understanding the growth of damage and cracks, loading rate dependency of crack propagation, and the effect of mixed mode fracture loading scenarios …