Principles of Extreme Mechanics (XM) in Design for Reliability (DfR) by Arief Suriadi Budiman

Author:Arief Suriadi Budiman
Language: eng
Format: epub
ISBN: 9789811567209
Publisher: Springer Singapore

4.3 Extended Linear Sensitivity Regime in Cu/Nb Nanolayers for Strain Sensing Applications

Multilayered nanocomposites, such as Cu/Nb, may have unique mechanoelectrical behaviors as revealed and presented in this section using the MECR technique (discussed in the previous chapter) with potential applications in Structural Health Monitoring (SHM). Cu/Nb nanolayers have been known for their extraordinary mechanical properties of very high flow strength, ultra-light weight and stable plastic flow to large strains, represent a class of novel composite nanomaterials in which there arises rare opportunities to design new materials from the ground up and to tailor their properties to suit exactly their performance requirements. These materials can withstand very high strains in the elastic regime without any inelastic relaxation due to plasticity or fracture compared to its bulk counterparts. This extended elastic regime opens up new possibilities for tuning the physical and chemical properties of materials as well as bringing novel functionalities, such as high-performance coating materials with online strain monitoring capability. Our findings in this article suggests basic feasibility study of a Cu/Nb multilayered nanocomposite with 20 nm layer thickness having a novel functionality for online strain monitoring capability, in addition to its more known application as a high-performance coating materials due to its extraordinary strength and deformability. A linear trend of resistivity with respect to engineering strain for strains in excess of 3.5% was observed and suggests a significant regime for use for strain sensor/detection/monitoring capability.

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