Browsing by Author "Rahman, Muhammad"

Now showing 1 - 5 of 5
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    A Preliminary Characterization of the Interfacial Properties of Solution Spun Carbon Nanotube Fibers
    (2023-11-27) Curtis, Nicholas Alexander; Rahman, Muhammad; Ajayan, Pulickel
    This thesis presents new data regarding the characterization of interfacial properties of highly aligned and densely packed solution-spun carbon nanotube fibers (CNTF) as a first step in a more sophisticated study on CNTF composites and their response to impact. Through characterization of the interphase region of a matrix-filler composite system, commentary on the efficiency of stress transfer between the bulk and reinforcement, and thus the quality of the adhesive bond, is provided. In order to acquire the necessary data for proper analysis, the single fiber pull-out test is employed using a high-precision rheometer. The data collected and presented herein are preliminary data for initial and first-ever insight into the newly developed CNT fibers, but larger batch sample sizes are required for increased statistical confidence in the results. Given the large impact of processing parameters on the mechanical characteristics of heterogeneous composite materials, minimal quantitative comparison to external studies is made. Instead, processes, characterization schemes, data reduction and analysis methods, and assessments are presented for simplified implementation of future data points in order to increase the significance of the results.
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    Additive manufacture-assisted method for making structural elements having controlled failure characteristics
    (2023-08-15) Sajadi, Seyed Mohammad; Meiyazhagan, Ashokkumar; Boul, Peter; Rahman, Muhammad; Thaemlitz, Carl; Ajayan, Pulickel; Rice University; Saudi Arabian Oil Company; William Marsh Rice University; United States Patent and Trademark Office
    A process for making a layered multi-material structural element having controlled mechanical failure characteristics. The process includes the steps of: supplying a cementitious layer and forming a polymer layer on the cementitious layer by additive manufacture such that the polymer layer has a first thickness and the cementitious layer has a second thickness, wherein the polymer layer comprises a polymer and the cementitious layer comprises a cementitious material; and allowing the polymer from the polymer layer to suffuse into the cementitious layer for a period of time to obtain a suffused zone in the cementitious layer such that the suffused zone has a third thickness that is less than half the second thickness.
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    Additive manufacture-assisted method for making structural elements having controlled failure characteristics
    (2024-06-18) Sajadi, Seyed Mohammad; Meiyazhagan, Ashok Kumar; Boul, Peter; Rahman, Muhammad; Thaemlitz, Carl; Ajayan, Pulickel; Rice University; Saudi Arabian Oil Company; United States Patent and Trademark Office
    A process for making a layered multi-material structural element having controlled mechanical failure characteristics. The process includes the steps of: supplying a cementitious layer and forming a polymer layer on the cementitious layer by additive manufacture such that the polymer layer has a first thickness and the cementitious layer has a second thickness, wherein the polymer layer comprises a polymer and the cementitious layer comprises a cementitious material; and allowing the polymer from the polymer layer to suffuse into the cementitious layer for a period of time to obtain a suffused zone in the cementitious layer such that the suffused zone has a third thickness that is less than half the second thickness.
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    Additive manufacture-assisted method for making structural elements having controlled failure characteristics
    (2024-05-28) Sajadi, Seyed Mohammad; Meiyazhagan, Ashok Kumar; Boul, Peter; Rahman, Muhammad; Thaemlitz, Carl; Ajayan, Pulickel; Rice University; Saudi Arabian Oil Company; United States Patent and Trademark Office
    A process for making a layered multi-material structural element having controlled mechanical failure characteristics. The process includes the steps of: supplying a cementitious layer and forming a polymer layer on the cementitious layer by additive manufacture such that the polymer layer has a first thickness and the cementitious layer has a second thickness, wherein the polymer layer comprises a polymer and the cementitious layer comprises a cementitious material; and allowing the polymer from the polymer layer to suffuse into the cementitious layer for a period of time to obtain a suffused zone in the cementitious layer such that the suffused zone has a third thickness that is less than half the second thickness.
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    Additive manufacture-assisted method for making structural elements having controlled failure characteristics
    (2024-05-28) Sajadi, Seyed Mohammad; Meiyazhagan, Ashok Kumar; Boul, Peter; Rahman, Muhammad; Thaemlitz, Carl; Ajayan, Pulickel; Rice University; Saudi Arabian Oil Company; United States Patent and Trademark Office
    A process for making a layered multi-material structural element having controlled mechanical failure characteristics. The process includes the steps of: supplying a cementitious layer and forming a polymer layer on the cementitious layer by additive manufacture such that the polymer layer has a first thickness and the cementitious layer has a second thickness, wherein the polymer layer comprises a polymer and the cementitious layer comprises a cementitious material; and allowing the polymer from the polymer layer to suffuse into the cementitious layer for a period of time to obtain a suffused zone in the cementitious layer such that the suffused zone has a third thickness that is less than half the second thickness.