A robust backward search method based on walk-through for point location on a 3D surface mesh

2008 ◽  
Vol 73 (8) ◽  
pp. 1061-1076 ◽  
Author(s):  
J. L. Shan ◽  
Y. M. Li ◽  
Y. Q. Guo ◽  
Z. Q. Guan
Keyword(s):  
Search Method ◽  
Surface Mesh ◽  
Point Location ◽  
3D Surface

scholarly journals Laplacian Mesh Deformation

2013 ◽  
Author(s):  
Arnaud Gelas
Keyword(s):  
Mesh Deformation ◽  
Soft Constraints ◽  
Surface Mesh ◽  
Flexible Design ◽  
3D Surface ◽  
Hard And Soft Constraints ◽  
Local Detail

Deforming a 3D surface mesh while preserving its local detail is useful for editing anatomical atlases or for mesh based segmentation. This contribution introduces new classes for performing hard and soft constraints deformation in a flexible design which allows user to switch easily in between Laplacian discretization operators, area weighing and solvers. The usage of these new classes is demonstrated on a sphere.

Evaluating Dents With Metal Loss Using Finite Element Analysis

2016 ◽  
Author(s):  
Justin Gossard ◽  
Joseph Bratton ◽  
David Kemp ◽  
Shane Finneran ◽  
Steven J. Polasik
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Laser Scanner ◽  
Mechanical Damage ◽  
Third Party ◽  
Burst Pressure ◽  
Metal Loss ◽  
Surface Mesh ◽  
Element Analysis ◽  
3D Surface

Dents created by third party mechanical damage are a severe integrity threat to onshore and offshore transmission pipelines. This type of damage is often associated with metal loss, which can be introduced during the initiation of a dent or develop as a result of the presence of a dent and associated coating damage. Once a dent has been found to be associated with metal loss through excavation, there is little guidance to determine the serviceability of the anomaly. In this study, dents with associated metal loss due to corrosion examined in the field are evaluated to determine the contribution of the interacting dent and metal loss features to the associated burst pressure of the feature. Twenty dents with metal loss flaws were identified through an ILI survey while in service to capture dimensions of the dent and metal loss features. Each site was excavated and measured using a laser scanner. The laser scanner produced 3D imaging with sufficient resolution of both the dent and metal loss areas as a 3D surface mesh. The 3D surface mesh was transformed into a 3D solid mesh and analyzed using a finite element analysis software package in order to determine a predicted internal pressure that would cause failure. A subsequent statistical assessment was performed to analyze the relationship between the ILI measurements and the predicted burst pressure resulting from finite element analysis of each dent with metal loss feature. Statistical analyses were used to evaluate the prediction capabilities of burst pressures of dent with metal loss features identified through ILI, prior to excavation and direct examination.

scholarly journals Fast Point and Element Search Method in Adaptive Remeshing Procedure and Its Applications

2011 ◽  
Vol 2011 ◽  
pp. 1-13 ◽  
Author(s):  
Jie Zhang ◽  
Abel Cherouat ◽  
Houman Borouchaki
Keyword(s):  
Finite Element ◽  
Density Distribution ◽  
Orthogonal Cutting ◽  
Milling Process ◽  
Search Method ◽  
Local Region ◽  
Three Dimension ◽  
Point Location ◽  
Adaptive Remeshing ◽  
Finite Element Numerical Simulation

The FPES (fast point and element search) method is a useful and efficient strategy for node field transfer from old mesh to the new mesh in adaptive remeshing procedure. The FE mesh after adaptive remeshing with various error estimates will be refined at local region, and the mesh after adaptive remeshing has the heterogeneous density distribution. The FPES has the capacity to define the nearest search path adapting to the mesh with heterogeneous density distribution. It is a point location process which includes point searching, point location in element, and weight factor distribution. This strategy has been integrated to our finite element adaptive remeshing simulations, and it works well and rapidly. The three-dimension finite element numerical simulation of simply tensile test, orthogonal cutting, and metal milling process is given out to study its accuracy and efficiency.

scholarly journals Methods for anchoring boundary nodes when smoothing a triangular surface mesh

2021 ◽  
Vol 12 (2) ◽  
pp. 207-219
Author(s):  
Sergei Sergeevich Shumilin
Keyword(s):  
Numerical Modeling ◽  
Surface Mesh ◽  
3D Surface ◽  
Smoothing Process ◽  
Surface Meshes ◽  
Triangular Surface Mesh

In numerical modeling tasks that use surface meshes, remeshing is often required. However, while remeshing, distortion can occur. The accumulation of distortions can lead to the collapse of the solution. Smoothing algorithms are used to maintain the quality of the mesh during the calculation. When performing smoothing using methods that shift the mesh nodes, the border nodes are usually fixed to avoid distortion. However, simply fixing the nodes can lead to more severe distortion. This paper presents methods for working with boundary nodes to control such nodes during the smoothing process. Algorithms for working with pseudo-3D surface meshes, which are of particular interest, are also considered.

An Adaptive 3D Surface Mesh Cutting Operation

2006 ◽  
pp. 366-374 ◽  
Author(s):  
Huynh Quang Huy Viet ◽  
Takahiro Kamada ◽  
Hiromi T. Tanaka
Keyword(s):  
Surface Mesh ◽  
3D Surface ◽  
Cutting Operation
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