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Akademický článek

Nonlocal Damage Mechanics for Quantification of Health for Piezoelectric Sensor

Autor: A. Habib, A. Shelke, U. Amjad, U. Pietsch, S. Banerjee

Publikováno v: Applied Sciences, Vol 8, Iss 9, p 1683 (2018)

In this paper, a novel method to quantify the incubation of damage on piezoelectric crystal is presented. An intrinsic length scale parameter obtained from nonlocal field theory is used as a novel measure for quantification of damage precursor. Featu

Externí odkaz: https://doaj.org/article/5fb4f1774210421eacb7da8713696888

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Akademický článek

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Akademický článek

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Monitoring damage in composite plates from crack initiation to macro-crack propagation combining linear and nonlinear ultrasonic techniques

Autor: U. Amjad, Hamad N. Alnuaimi, Tribikram Kundu, Valentina Lopresto, Pietro Russo

Publikováno v: Structural health monitoring (2021): 139–150. doi:10.1177/1475921720922922
info:cnr-pdr/source/autori:Alnuaimi, Hamad; Amjad, Umar; Russo, Pietro; Lopresto, Valentina; Kundu, Tribikram/titolo:Monitoring damage in composite plates from crack initiation to macro-crack propagation combining linear and nonlinear ultrasonic techniques/doi:10.1177%2F1475921720922922/rivista:Structural health monitoring/anno:2021/pagina_da:139/pagina_a:150/intervallo_pagine:139–150/volume

In this article, a holistic technique for sensing damage initiation, as well as damage progression in composite plates, is presented combining linear and nonlinear ultrasonic techniques. For this investigation, multiple sets of composite plate specim

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::197e0ad9df30cf1d72be98bb086de98b
https://doi.org/10.1177/1475921720922922

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An improved nonlinear ultrasonic technique for detecting and monitoring impact induced damage in composite plates

Autor: Tribikram Kundu, U. Amjad, Hamad N. Alnuaimi, Pietro Russo, S. Park, Valentina Lopresto

An improved technique for sensing damage initiation and progression in thermoplastic resin composite plate specimens is presented in this study. The composite plate specimens are investigated by using a nonlinear ultrasonic (NLU) technique called S i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::29c83de80f3fceb63087c935d7e6f394
http://hdl.handle.net/11588/883660

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Alkali Activated Fly Ash-Based Concrete: Evaluation of Curing Process Using Non-Linear Ultrasonic Approach

Autor: Saptarshi Sasmal, Tribikram Kundu, U. Amjad, Arash Nikvar-Hassani, Hamad N. Alnuaimi, Lianyang Zhang

Publikováno v: Journal of Nondestructive Evaluation, Diagnostics and Prognostics of Engineering Systems. 5

This paper investigates the applicability of the nondestructive testing and evaluation (NDT&E) method using ultrasonic signals to monitor the curing of alkali-activated fly ash-based concrete (AAFC). The evaluation was carried out on AAFC specimens w

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ca2963265c738c7a503485958cbdb985
https://doi.org/10.1115/1.4052952

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Synthesis of Geopolymer Concrete Using Flyash

Autor: S U Amjad, M A Budihardjo, I B Priyambada, R Asghar

Publikováno v: IOP Conference Series: Earth and Environmental Science. 1098:012072

Geopolymer concrete (GPC) reduces the environmental impacts of conventional Portland cement concrete, therefore, this research aims to investigate the compressive characteristics of GPC by utilizing the readily available industrial waste i.e., coal b

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5ad8e38eeb3003f42ad0f9a6f5f99a78
https://doi.org/10.1088/1755-1315/1098/1/012072

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Monitoring Concrete Curing by Linear and Nonlinear Ultrasonic Methods

Autor: Lianyang Zhang, Arash Nikvar-Hassani, Hamad N. Alnuaimi, Saptarshi Sasmal, Tribikram Kundu, U. Amjad

Publikováno v: ACI Materials Journal. 118

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2c65487a26966323cf0398a76bfb6292
https://doi.org/10.14359/51730412

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Reinforcement Effect on the Static Analysis of Circular Footing Resting over Winkler Elastic Foundation

Autor: U. Amjad, P. K. Basudhar, Susheel Kumar Yadav

Publikováno v: Geotechnical and Geological Engineering. 36:3665-3681

This paper pertains to the development of a lumped parameter model for predicting the flexural response of a circular footing resting on an engineered reinforced soil bed. The bed is constructed by placing a smooth circular geo-mat over the natural l

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4e153a5c1e284a5e1f15c2ea1743443b
https://doi.org/10.1007/s10706-018-0564-1

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