Zobrazeno 1 - 10 of 116 pro vyhledávání: '"Umar Amjad"'
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Akademický článek
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Akademický článek
Development and Characterization of Silver-Doped Multi-Walled Carbon Nanotube Membranes for Water Purification Applications
Autor: Muhammad Umar Amjad, Bilal Anjum Ahmed, Faisal Ahmed, Hasan Aftab Saeed
Publikováno v: Membranes, Vol 12, Iss 2, p 179 (2022)
A unique approach was utilized to develop multi-walled carbon nanotube (MWCNT) silver (Ag) membranes. MWCNTs were impregnated with 1 wt% Ag loading, which resulted in a homogeneous dispersion of Ag in MWCNTs. MWCNTs impregnated with Ag were then unia
Externí odkaz: https://doaj.org/article/8a659a7b47ab4481ba077045622b62ab
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A Non-Linear Ultrasonic Approach Using a Fine-Tuned Experimentally Defined Frequency for Structural Health Monitoring of Composite Plates
Autor: Hamad Alnuaimi, Umar Amjad, Pietro Russo, Valentina Lopresto, Tribikram Kundu
Publikováno v: 2022 49th Annual Review of Progress in Quantitative Nondestructive Evaluation.
The Sideband Peak Count – Index (SPC-I) technique, which is a newly developed non-linear ultrasonic (NLU) technique has been established as a reliable technique for detecting and monitoring non-linear detects in various materials such as metals, co
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::abc5eca7a9e2ee0bc541298f175b8c76
https://doi.org/10.1115/qnde2022-98012
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Real-Time Structural Health Monitoring of Concrete Using the Non-Linear Ultrasonic SPC-I Technique
Autor: Umar Amjad, Hamad Alnuaimi, Arash Nikvar-Hassani, Imraan Bokhari, Lianyang Zhang, Tribikram Kundu
Publikováno v: 2022 49th Annual Review of Progress in Quantitative Nondestructive Evaluation.
Continuous monitoring is the most desirable approach for ensuring the health/integrity of concrete structures. It is particularly difficult to monitor concrete structures due to their non-linear nature and random distribution of constituents. Evaluat
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2ca5e678a762e1e3cedefab328619781
https://doi.org/10.1115/qnde2022-98407
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7
ROBUST DETECTION OF DAMAGE IN COMPOSITE PLATES USING THE NONLINEAR SPC-I ULTRASONIC TECHNIQUE
Autor: HAMAD ALNUAIMI, UMAR AMJAD, SEHYUK PARK, PIETRO RUSSO, VALENTINA LOPRESTO, TRIBIKRAM KUNDU
Publikováno v: Proceedings of the 13th International Workshop on Structural Health Monitoring.
The newly developed non-linear ultrasonic (NLU) technique known as the Sideband Peak Count - Index (SPC-I) has demonstrated that it can detect and monitor the non-linearity generated by defects in a wide range of materials such as metals, composites,
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b9ff12bb10362682a79f3843b82f71b1
https://doi.org/10.12783/shm2021/36361
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Nonlinear Acoustic Technique for Monitoring Porosity in Additively Manufactured Parts
Autor: SeHyuk Park, Hamad Alnuaimi, Anna Hayes, Madison Sitkiewicz, Umar Amjad, Krishna Muralidharan, Tribikram Kundu
Publikováno v: Journal of Nondestructive Evaluation, Diagnostics and Prognostics of Engineering Systems. 5
Ultrasonic wave based techniques are widely used for damage detection and for quantitative and qualitative characterization of materials. In this study, ultrasonic waves are used for probing the response of additively manufactured 316L stainless stee
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6434628d5c874da690f9af851d547a02
https://doi.org/10.1115/1.4053252
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9
Evaluating the Degree of Nonlinearity by Applying the Nonlinear SPC-I Technique in the FEM Simulation of Materials With Breathing Cracks
Autor: SeHyuk Park, Hamad Alnuaimi, Umar Amjad, Tribikram Kundu
Publikováno v: 2021 48th Annual Review of Progress in Quantitative Nondestructive Evaluation.
Detecting internal defects such as fatigue cracks in their early stages is critically important to avoid catastrophic failures. However, detection of micro-scale defects poses a challenge to NDT/SHM (Non-Destructive Testing & Structural Health Monito
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ea2cc1790db38082b53bc7ebc6bd7b73
https://doi.org/10.1115/qnde2021-74617
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10
Linear and Nonlinear Analysis of Additively Manufactured Material With Different Porosity Induced by Varying Material Printing Speed Using Guided Acoustic Waves
Autor: SeHyuk Park, Hamad Alnuaimi, Anna Hayes, Madison Sitkiewicz, Umar Amjad, Krishna Muralidharan, Tribikram Kundu
Publikováno v: 2021 48th Annual Review of Progress in Quantitative Nondestructive Evaluation.
Guided acoustic wave based techniques have been found to be very effective for damage detection, and both quantitative and qualitative characterization of materials. In this research, guided acoustic wave techniques are used for porosity evaluation o
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::67484e83682688a362e33b4da573341c
https://doi.org/10.1115/qnde2021-74686
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