Abstract The melting of an ABS resin was simulated using a three-dimensional finite element simulation the two-phase flow in compression section single-screw extruder. Screw freezing experiments were also conducted to compare numerical predictions with corresponding experimental data. Numerical simulations as well exhibited Maddock mechanism and good agreement sensitivity profile various material properties processing conditions numerically analyzed. With constant rate enforced at entrance...

The mechanical and tribological behaviors of the parts manufactured with 3D printing methods differ variations in manufacturing parameters. This paper aims to investigate effect layer thickness orientation parameters on hardness, friction coefficient wear properties PLA samples printed by Fused Deposition Modelling (FDM) method. Samples were three different thicknesses two build orientations. hardness was tested D-type shore durometer a pin-on-disc setup used measure rate samples. analysis...

Purpose This paper aims to analyze experimentally and numerically the effect of nozzle temperature feed rates on dimensions fused deposition modeling (FDM) polymer parts. Design/methodology/approach In total, 30 strips per sample were printed with same width as diameter. The one vertical movement head. was measured a caliper at five locations. A linear regression model created based experimental data understand correlation between strip deviation parameters interest. Numerical simulations...

Abstract In robotics, the origami-based design methodology uses straightforward fabrication and assembly processes to create small-scale parallel mechanisms. Delta mechanisms are among well-known used mostly in pick-and-place operations due their capability reach high speeds accelerations. this work, we present a novel mechanism based on origami-inspired designs two-dimensional layer-by-layer methods, reducing time errors manufacturing. We developed new flat parallelogram providing...

Purpose This paper aims to develop experimentally validated numerical models accurately characterize the cross-sectional geometry of deposited beads in a fused filament fabrication (FFF) process under various conditions. Design/methodology/approach The presented model is investigated fidelity with varying computational complexity. To this end, comparisons between Newtonian, non-newtonian, isothermal and non-isothermal are for extrusion polylactic acid material an FFF process. through...

Abstract Frictional forces (for temperatures less than the melting or devitrification temperature) and viscous higher temperatures) have important roles on solids conveying processes in plasticating single‐screw extruders. These are related to shear stresses at polymer–metal interfaces. For which frictional main factor for stresses, it is experimentally difficult obtain interface. The interpretation of data has further complications due energy dissipation An instrument called Screw Simulator...

Summary Finite element method (FEM) is a well‐developed to solve real‐world problems that can be modeled with differential equations. As the available computational power increases, complex and large‐size solved using FEM, which typically involves multiple degrees of freedom (DOF) per node, high order elements, an iterative solver requiring several sparse matrix‐vector multiplication operations. In this work, new storage scheme proposed for matrices arising from FEM simulations DOF node. A...

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Complex numbers and complex functions are frequently utilized in solving equations of motion free harmonic responses vibration systems. However, certain fundamental details sometimes overlooked many books articles may present differential with inconsistencies, which can confuse meticulous readers. This confusion often arises because one side the is real form, while other expressed form. To address this issue, article offers examples from literature to highlight perplexing situation provides...

Bu çalışmada, ağsız yöntemler için radyal özelliğe sahip yeni bir temel fonksiyon önerilmiştir. Önerilen fonksiyon, iki boyutta, dört farklı problemde, yöntemlerde sıklıkla kullanılan Ters Multikuadrik ve Gauss fonksiyonlarıyla birlikte test edilmiştir. Test problemlerinin üç tanesi 2. mertebeden mühendislik problemlerini içerirken son problemi 4. uygulaması olmuştur. problemlerinde sınır koşulları problem türleri incelenmiştir. Yapılan sayısal deneyler, önerilen fonksiyonun fonksiyonlarına...

Delta mechanism is one of the well-known parallel mechanisms used in robotic applications. In this study, trajectory behavior a novel mechanism, which was designed and fabricated using layer-by-layer origami method, investigated utilizing finite element method (FEM). The modeled with dimensions actual mechanism. consists four different materials where properties two are extracted experimentally via tensile testing process. accuracy our model compared to simulations results indicated that...

In this paper, a new dynamic model for the vibration analysis of an inwardoriented rotating cantilever beam with extra distributed mass was presented. The derived differential equation motion solved using meshless methods generalizedMultiquadric Radial Basis Function (RBF) and eigenfrequencies system were determined. same problem also modeled finite element method results compared to validate accuracy proposed model. Later, effect partially amount location on studied various lengths. showed...