Results 21 to 30 of about 468 (145)

Local and Global Approaches to Fracture Mechanics Using Isogeometric Analysis Method

Journal of Applied and Computational Mechanics, 2015
In the present research, implementations of different computational geometry technologies in isogeometric analysis framework for computational fracture mechanics are investigated.
Abdolghafoor Khademalrasoul, Reza Naderi
doaj   +1 more source

Research on the S-shaped time-rounding series feedrate scheduling based on NURBS curve

Advances in Mechanical Engineering, 2022
The inconsistency between continuous feedrate scheduling and discrete interpolation of Non-Uniform Rational B-Splines (NURBS) curves as toolpath interpolation affects the interpolation accuracy and motion smoothness of computer numerical control (CNC ...
Jichun Wu, Ke Xu, Guangan Ren, Dapeng Fan   +3 more
doaj   +1 more source

Fitting Terrestrial Laser Scanner Point Clouds with T-Splines: Local Refinement Strategy for Rigid Body Motion

Remote Sensing, 2021
T-splines have recently been introduced to represent objects of arbitrary shapes using a smaller number of control points than the conventional non-uniform rational B-splines (NURBS) or B-spline representatizons in computer-aided design, computer ...
Gaël Kermarrec, Niklas Schild, Jan Hartmann   +2 more
doaj   +1 more source

NURBS-Based Isogeometric Analysis Method Application to Mixed-Mode Computational Fracture Mechanics [PDF]

Journal of Applied and Computational Mechanics, 2019
An interaction integral method for evaluating mixed-mode stress intensity factors (SIFs) for two dimensional crack problems using NURBS-based isogeometric analysis method is investigated. The interaction integral method is based on the path independent J-
Abdolghafour Khademalrasoul
doaj   +1 more source

Variational Formulations and Isogeometric Analysis of Timoshenko–Ehrenfest Microbeam Using a Reformulated Strain Gradient Elasticity Theory

Crystals, 2022
This paper presents a novel non-classical Timoshenko–Ehrenfest beam model based on a reformulated strain gradient elasticity theory. The strain gradient effect, couple stress effect, and velocity gradient effect for vibration are included in the new ...
Shuohui Yin, Zhibing Xiao, Jingang Liu, Zixu Xia, Shuitao Gu   +4 more
doaj   +1 more source

Comparative Analysis of NURBS and Finite Element Method in Computational Fluid Dynamics Applications: Case Study on NACA 2412 Airfoil Aerodynamics

Mathematics
In this research, an attempt was made to employ the Non-Uniform Rational B-Splines (NURBS) method for a challenging computational fluid dynamics (CFD) problem of aerodynamics around NACA 2412 airfoils.
Sohaib Guendaoui, Lahcen El Ouadefli, Abdeslam El Akkad, Ahmed Elkhalfi, Sorin Vlase, Maria Luminița Scutaru   +5 more
doaj   +1 more source

Isogeometric Fast Multipole Boundary Element Method Based on Burton-Miller Formulation for 3D Acoustic Problems

Archives of Acoustics, 2019
An isogeometric boundary element method is applied to simulate wave scattering problems governed by the Helmholtz equation. The NURBS (non-uniform rational B-splines) widely used in the CAD (computer aided design) field is applied to represent the ...
Leilei CHEN, Wenchang ZHAO, Cheng LIU, Haibo CHEN, Steffen MARBURG   +4 more
doaj   +1 more source

A New Path Generation Algorithm Based on Accurate NURBS Curves

International Journal of Advanced Robotic Systems, 2016
The process of finding an optimum, smooth and feasible global path for mobile robot navigation usually involves determining the shortest polyline path, which will be subsequently smoothed to satisfy the requirements. Within this context, this paper deals
Sawssen Jalel, Philippe Marthon, Atef Hamouda   +2 more
doaj   +1 more source

A Physical Process Driven Digital Terrain Model Generating Method Based on D-NURBS

IEEE Access, 2020
Airborne light detection and ranging (LiDAR) technology is becoming the primary method for generating high-resolution digital terrain models (DTMs), which is essential for commercial and scientific uses.
Danlei Ye, Xin Jiang, Guanying Huo, Cheng Su, Zehong Lu, Bolun Wang, Zhiming Zheng   +6 more
doaj   +1 more source

A Simple, Dynamic Geometric Phantom for MRI and CT Reconstruction Pipelines: Beyond Shepp–Logan

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT A customizable, dynamic geometric phantom was developed to bridge the gap between simplistic static phantoms and highly realistic, complex 4D solutions. The phantom enables initial testing, helps detect implementation errors, and supports quantitative evaluation of new dynamic acquisition and reconstruction methods.
Tamás Hakkel, Noémi Kovács, József Sinkó, Domokos Máthé, Krisztián Szigeti   +4 more
wiley   +1 more source