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Engineering Transactions
Scopus
ISSN 0867-888X · Institute of Fundamental Technological Research Polish Academy of Sciences · 2.399 artikel di indeks
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Caustics Formation by a Spherical Reflector – Geometric and Wave Field Analysis with Applications in Room Acoustics and Radio Astronomy
Based on the principles of geometrical optics, an analytical description of caustics generated in a spherical mirror is presented. The formation of caustics in a wave field is studied using acoustic and electromagnetic waves as an example. Symmetry of equations describing energy relations in…
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Global buckling of a thin-walled T-frame with consideration of the shear effect
The work concerns the global elastic buckling problem of a thin-walled T-frame with consideration of the shear effect. A novel approach was used to account for this effect namely the non-linear shear deformation theory which gives as a result the shear deformation function describing the behaviour…
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Challenges of Corrosion, Wear, Erosion, and Abrasion in Hydropower Plants: Materials, Modeling, and Mitigation Strategies
The chemical, food processing, hydropower, thermal power, and oil industries are among the sectors that frequently face problems of erosion, abrasion, and corrosion. Pipelines, elbows, reducers, separators, tees, and seals are among the hydraulic devices and pipeline components that are impacted by…
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Multi-Objective Collaborative Optimization of Central Support Components in Steel Structures Integrating NSGA-II and Nested Topology Optimization
This paper presents a multi-objective collaborative optimization framework for central support member in steel structures, aiming to simultaneously minimize structural mass and compliance. Traditional design methods often optimize a single objective, therefore limiting overall performance. To…
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Modeling Defect Detection in 3D-Printed Structures Using Ultrasonic Guided Waves
Carbon fiber-reinforced thermoplastic (CFRTP) composites are widely utilized in 3D printing via the fused filament fabrication (FFF) process. However, defects within printed components can compromise their performance. This study investigates the application of ultrasonic non-destructive testing…
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Machine Learning-Based Welding Defect Recognition Using GLCM Features and k-Fold Cross-Validation: KNN and SVM Techniques
Although radiographic inspection is one of the oldest techniques for non-destructive testing, it is still considered vital in many industrial fields to ensure the quality of welds and meet the demands of work conditions and design, as well as safety and reliability requirements. This paper presents…
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Investigation of the Effect of Fin Geometry on the Thermal Performance of Microelectronic Devices
This study systematically evaluates the optimal heat sink geometry for enhanced thermal performance in electronic cooling applications. ANSYS-Icepak and COMSOL Multiphysics software assessed four distinct fin geometries (square, rectangular, circular, and conical), all uniformly sized for accurate…
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Exploring the Synergistic Influences of Clay Nanoplatelets and Waste Eggshell Particles on PMMA-Based Hybrid Nanocomposites
This study investigates the impact of incorporating clay nanoplatelets and waste eggshell particles into poly(methyl methacrylate) (PMMA) to develop hybrid nanocomposites with improved mechanical and structural properties. Waste eggshells, rich in biogenic calcium carbonate, were utilized as a…
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Optimization of Dual-Constraint Robotic Arm Grasping Operations Based on an Optimized Contact Grasping Network
With the continuous advancement of intelligent manufacturing and robot perception capabilities, traditional robotic arm grasping methods still face problems such as inaccurate pose prediction and poor task adaptability when operating in dynamic scenes, handling complex objects, and executing…
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Torsion of Functionally Graded Material Structures: An Overview
Examining torsion in functionally graded materials (FGMs) is crucial because their properties vary spatially. FGMs with continuously graded architectures provide a robust basis for investigating mechanical behavior. Current understanding of torsional response draws on analytical, numerical, and…
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Sustainable Natural and Synthetic Fiber/Epoxy Composites: Mechanical Characterization and One-Way ANOVA Statistical Analysis
It is now well recognized that the combination of natural and synthetic fibers in synergistic fiber-reinforced composite materials can greatly broaden their applications in engineering and technology. Natural fibers are gaining increasing attention because of their biodegradability, easy…
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Artikel Jurnal
Collision Integral for Non-Equilibrium Distributions of 1D Bosons with Non-Linear Dispersions
In order to understand transport phenomena in the quasi-classical regime, the Boltzmann transport equation (BTE) is one of the most frequently used tools. Therein, the key quantity is the collision integral – the quantity that encapsulates the properties of the medium under consideration. Usually…
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On the Out-of-Plane Deviation of Bending Deformation States in Moderately Thick Bars with Asymmetric Cross-Sections
A characteristic feature of the six-parameter theories of bars is the coupled form of the constitutive equations; in particular the equations linking transverse forces with transverse shear deformations cannot be, in general, decoupled while keeping a separate form of the remaining constitutive…
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Non-Linear Analysis of Wrinkling Phenomenain Sandwich Beams with a Soft Core
This work is devoted to the local stability analysis of sandwich beams with a light core. A linear as well as a non-linear numerical analysis is carried out with the use of the finite element method (FEM). Both material and geometrical nonlinearities are taken into account. The goal of the…
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Numerical Modeling of the Aluminum Alloy AW5083 Using Large-Strain Thermo-Elasto-Plasticity
This paper deals with the constitutive modeling and finite element (FE) simulations of advanced models related to large-strain thermo-elasto-plastic behavior of aluminum alloy AW5083, which can reproduce the material response at different temperatures from room temperature up to 500 °C. Significant…
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Simulation Study of Direct-Shear Test on FRP-to-Concrete Bonded Joints by Means of XFEM
A proper numerical modelling of FRP-to-concrete bonded joints is crucial for determining their strength. In this paper, the results of numerical analyses performed using XFEM on such joints in direct-shear test are presented. The study uses a fracture mechanics approach based on the…
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A Small-Sample Fault Diagnosis Method for Rolling Bearings Based on Balanced Distribution Adaptation and Support Vector Machine
To address the issue of low diagnostic accuracy caused by distribution differences between the source and target domains in rolling bearing fault diagnosis, this study proposes a method combining balanced distribution adaptation (BDA) and support vector machines (SVMs). The approach utilizes BDA to…
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Analytical Approach and Shooting Method for the Solution of a Nonlocal Eringen Elasticity Problem of Nanorods
The aim of this paper is to study the post-buckling behavior of nanorods, taking into account small scale effects. In this paper, the buckling of a nanorod column subjected to a tip load is investigated. The nanorod is on a clamped support at one end, while the other end is simply supported and…
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