Ramzi Othman

ORCID: 0000-0001-9037-5671
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About
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Research Areas
  • High-Velocity Impact and Material Behavior
  • Mechanical Behavior of Composites
  • Structural Response to Dynamic Loads
  • Energetic Materials and Combustion
  • Electromagnetic Launch and Propulsion Technology
  • Natural Fiber Reinforced Composites
  • Railway Engineering and Dynamics
  • Civil and Geotechnical Engineering Research
  • Structural Load-Bearing Analysis
  • Geotechnical Engineering and Underground Structures
  • Ultrasonics and Acoustic Wave Propagation
  • Polymer crystallization and properties
  • Transportation Safety and Impact Analysis
  • Laser-Plasma Interactions and Diagnostics
  • Elasticity and Material Modeling
  • Structural Analysis of Composite Materials
  • Cellular and Composite Structures
  • Vibration and Dynamic Analysis
  • Composite Structure Analysis and Optimization
  • Structural Health Monitoring Techniques
  • Structural Behavior of Reinforced Concrete
  • Structural Engineering and Vibration Analysis
  • Optical measurement and interference techniques
  • Tribology and Wear Analysis
  • Fluid Dynamics Simulations and Interactions

King Abdulaziz University
2015-2024

Universiti Malaysia Pahang Al-Sultan Abdullah
2021

École Centrale de Nantes
2007-2020

Institut de Recherche en Génie Civil et Mécanique
2007-2020

King Abdul Aziz University Hospital
2020

Centre National de la Recherche Scientifique
2012-2015

Université Nantes Angers Le Mans
2012-2015

Nantes Université
2009-2012

Norwegian University of Science and Technology
2011

University of Baghdad
2010

This article presents a mathematical continuum model to analyze the free vibration response of cross-ply carbon-nanotube-reinforced composite laminated nanoplates and nanoshells, including microstructure length scale effects. Different shell geometries, such as plate (infinite radii), spherical, cylindrical, hyperbolic-paraboloid elliptical-paraboloid are considered in analysis. By employing Hamilton’s variational principle, equations motion derived based on hyperbolic sine function shear...

10.3390/math10040583 article EN cc-by Mathematics 2022-02-13

10.1016/j.ijimpeng.2017.04.023 article EN International Journal of Impact Engineering 2017-04-28

The present study demonstrates the free vibration behavior of composite laminated shells reinforced by both randomly oriented single-walled carbon nanotubes (SWCNTs) and functionally graded fibers. shell structures with different principal radii curvature are considered, such as cylindrical, spherical, elliptical–paraboloid shell, hyperbolic–paraboloid plate. volume fraction fibers has a linear variation along thickness from layer to layer, while CNTs is constant in all layers uniformly...

10.3390/math10030408 article EN cc-by Mathematics 2022-01-27

Abstract Low‐velocity impact experiments are essential for evaluating the mechanical behavior and resistance of composite materials in engineering applications. These primarily based on measurement force‐time signal a few parameters, including energy, velocity, mass. All other such as displacement, absorbed subsequently derived from these fundamental inputs. This paper first investigates influence miscalibration force signals, highlighting its significant reliability calculated energy....

10.1002/pc.29896 article EN cc-by Polymer Composites 2025-04-05

10.1016/j.ijadhadh.2010.02.004 article EN International Journal of Adhesion and Adhesives 2010-02-17

10.1016/j.crme.2006.04.001 article FR other-oa Comptes Rendus Mécanique 2006-05-16

The fragmentation process is a main concern in many engineering applications such as preventing flameouts of aircraft engines. authors this article are interested measuring the critical impact velocity for ice fragmentation. Precisely, dropweight technique was applied to study ball impacts on glass plates. influence temperature, diameter and angle also investigated. after-impact state found be classified into two cases: an altered non-altered state. defined minimum which after or maximum not...

10.1177/0954406211426639 article EN Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science 2011-11-15

Polyetheretherketone (PEEK) is used in several engineering applications where it has to bear impact loads. Nevertheless, the tensile behavior only been studied quasi-static range of loading rates. To address lack data strain rate range, mechanical PEEK investigated at room temperature over a large rates (from 0.001 1000/s). The macroscopic volume change under uniaxial tension using digital image correlation (DIC) method, showing significant dilatation that reaches 16% logarithmic axial 40%....

10.1155/2015/275937 article EN cc-by International Journal of Polymer Science 2015-01-01
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