A5048977925- High-Velocity Impact and Material Behavior
- Metal Forming Simulation Techniques
- Cellular and Composite Structures
- Additive Manufacturing and 3D Printing Technologies
- Electromagnetic Launch and Propulsion Technology
- Energetic Materials and Combustion
- Mechanical and Thermal Properties Analysis
- Elasticity and Material Modeling
- Metallurgy and Material Forming
- Structural Response to Dynamic Loads
- Metal and Thin Film Mechanics
- Additive Manufacturing Materials and Processes
- Advanced materials and composites
- Advancements in Materials Engineering
- Structural Engineering and Materials Analysis
- Lower Extremity Biomechanics and Pathologies
- Diabetic Foot Ulcer Assessment and Management
- Polymer Foaming and Composites
- Polymer Nanocomposites and Properties
- Structural Load-Bearing Analysis
- Mechanical Engineering and Vibrations Research
- Erosion and Abrasive Machining
- Mechanical Behavior of Composites
- Metal Alloys Wear and Properties
- Automotive and Human Injury Biomechanics
Military University of Technology in Warsaw
2015-2025
Military Institute of Armament Technology
2017
The main aim of this article is the analysis deformation process regular cell structures under quasi-static load conditions. methodology used in presented investigations included a manufacturability study, strength tests base material as well experimental and numerical compression developed cellular structures. A honeycomb four variants with gradually changing topologies different relative density values have been successfully designed produced TPU-Polyflex flexible thermoplastic...
Laser Engineered Net Shaping (LENSTM) is currently a promising and developing technique. It allows for shortening the time between design stage manufacturing process. LENS an alternative to classic metal methods, such as casting plastic working. Moreover, it enables production of finished spatial structures using different types metallic powders starting materials. Using this technology, thin-walled honeycomb with four cell sizes were obtained. The technological parameters process selected...
<title>Abstract</title> This study presents the geometrical optimisation of fitting connectors to a Continuous Positive Airway Pressure (CPAP) helmet for use with ventilator in treatment acute respiratory failure. The initial design, developed 2019 during COVID-19 pandemic, underwent several stages. goal was reduce size and weight air supply exhaust fittings while improving manufacturability via 3D printing. Two additive manufacturing (AM) techniques were evaluated: Fused Filament...
The main aim of the paper is to present results experimental investigations on deformation process cellular structures with gradient topologies under quasi-static loading conditions. specimens used in tests were designed use a hexagon shape unit cell graded size preserving equivalent global and wall thickness dimensions. manufacturing structure samples was realized by two different 3D printing methods: FFF (Fused Filament Fabrication) SLA (Selective Laser Sintering). Additionally, types...
The aim of this study is to determine the mechanical behavior 2D honeycomb cellular structures with deformation initiators subject quasi-static compression testing. Two different loading directions were studied: in-plane (IP) and out-of-plane (OP). sought stabilize response by decreasing initial peak force in case OP loading. samples for testing made using stainless steel 316L that was 3D-printed material extrusion (MEX). method enables fabrication high strength ductility. findings showed...
Abstract Elastomers are widely used in many industries. Their use requires thorough knowledge of their strength and stiffness parameters over a wide temperature range. However, determination the such materials is still challenge. Therefore, paper presents research methodology allowing properties rubber-like range stretch temperatures (from +50°C to −25°C) by using example styrene-butadiene rubber (SBR) natural (NR) elastomers. Additionally, two blends, chloroprene rubber/nitrile-butadiene...
The paper describes the design concept and findings from technological initial clinical trials conducted to develop a helmet for non-invasive oxygen therapy using positive pressure, known as hCPAP (Helmet Continuous Positive Airway Pressure).The study utilized PET-G filament, recommended material medical applications, along with FFF 3D printing technique. Additional investigations were performed production of fitting components. authors proposed parameter identification method printing,...
The article presents a new experimental method of analysis density and longitudinal engineering compressive strain (LECS) in porous ductile rod, plastically deformed with Taylor direct impact experiment (Taylor DIE). Two essential singularities the distribution LECS are revealed, namely: maximum e r max occurs near rod striking end (Fig. 2), at high velocities ( U > 100 m/s) decreases along an increase initial porosity, this behaviour is inverse to that under static loading. dynamical –...
This paper presents the process of manufacturing mechanical joint components using additive (AM) techniques such as Material Extrusion (Fused Deposition Modelling (FDM)), Jetting (PolyJet), and Vat Photopolymerization (VAT)/Stereolithography (SLA). Using PolyJet technique a photopolymer resin, spline threaded were produced. For comparative analysis, was also fabricated FDM SLA techniques. PLA material used for technique, while resin utilized process. The produced underwent surface analysis...
The paper presents results of numerical modeling interaction between projectile and 9 mm pistol barrel. During the investigations, in quasi-static dynamic conditions were obtained. Simulations first case allowed for validation model using direct comparison theoretical with resistant force courses obtained applying experimental stand. mechanical properties jacket described based on bilinear Johnson – Cook model. For considerable differences provided by simplified relationships proposed...