Geometric Analysis of Pipeline Elbows Through Reverse Engineering and Their Associated Imperfections

2014 ◽  
Author(s):  
Muntaseer Kainat ◽  
Celal Cakiroglu ◽  
Samer Adeeb ◽  
J. J. Roger Cheng ◽  
Michael Martens
Keyword(s):  
Reverse Engineering ◽  
Wall Thickness ◽  
Geometric Analysis ◽  
Laser Scanner ◽  
Initial Imperfection ◽  
3D Models ◽  
Element Analysis ◽  
Engineering Software ◽  
Pipe Elbow ◽  
The Ideal

Pipe elbow is a common feature in pipelines and piping systems as a means to changing directions of otherwise straight pipelines. Irrespective of the processes involved in manufacturing pipe elbows, it is of interest to investigate whether they have any geometric imperfections. Researchers at the University of Alberta have devised a technique to measure initial imperfection of straight pipes prior to testing, using high resolution 3D surface profiler in conjunction with 3D reverse engineering software. The objective of the current study is to extend the imperfections measurement technique from measuring straight pipe segments to pipe elbows. Six (6) ninety (90) degree elbows are measured in this research with outside diameters ranging from NPS 12 inch to NPS 42 inch. A 3D laser scanner is used to acquire surface data and create 3D models corresponding to each elbow. A method for the geometric analysis of the elbows is developed using 3D inspection and reverse engineering software Geomagic®. The geometric idealization of a pipe elbow is a torus, which can be defined by a circle revolving around an axis, coplanar with the circle. The idealized geometry for each elbow is obtained through the developed method of geometric analysis, which includes the diameter of the circle defining the torus, and its distance from the axis of revolution. The difference between the ideal torus and the scanned geometry is considered as imperfection of each pipe elbow. The wall thickness values at the ends or edges of select pipe elbows are also measured from the scanned data and are reported as percentage deviation from the specified wall thickness around the perimeter at different cross sections. The 3D reverse engineering of the elbows indicated that they resemble the ideal geometry very closely. The ovalization imperfections are seen to be well within the value specified by CSA Z662-11. The wall thickness deviations are seen to vary between −10% to +25% of the specified value, with increased thickness being more prominent in the elbows. Finite element analysis of an elbow with thickness imperfection shows that higher hoop stress appears on the intrados than initially intended.

Reconstruction of Geometrical Structure of Claw of Mole Rat (Scaptochirus moschatus) and Finite Element Analysis of Claw against Soil

2013 ◽  
Vol 461 ◽  
pp. 108-113
Author(s):  
Wen Feng Ji ◽  
Jin Tong ◽  
Dong Hui Chen
Keyword(s):  
Finite Element ◽  
Reverse Engineering ◽  
Geometrical Structure ◽  
Curve Surface ◽  
Laser Scanner ◽  
Original Data ◽  
Element Analysis ◽  
Mole Rat ◽  
Movement Type ◽  
Data Points

Mole rat, a typical soil-burrowing animal, has high working efficiency during digging procedure, its claws are good biomimetic prototypes, and the geometrical structure of its claws and its movement type during digging can provide certain foundation for improving the design of the tillage implement. In this paper, based on the reverse engineering, the original data points of the claw was collected by a 3D laser scanner, then the accurate surface of the claw was created by using special software of reverse engineering on the premise of point-curve-surface method. The reconstructed CAD model was established in Pro/E software, and the model of interaction between the claws of mole rat and soil was obtained. The finite element method (FEM) was utilized to simulate the interaction of the claw against soil. The simulated results showed that the movement type of claw of mole rate during digging could get lower cutting resistance and bigger impact to soil.

Fracture Surface Measurement of Concrete with Respect to Loading Speed

2014 ◽  
Vol 982 ◽  
pp. 94-99 ◽  
Author(s):  
Michal Mára ◽  
Petr Maca
Keyword(s):  
Fracture Surface ◽  
Reverse Engineering ◽  
Impact Loading ◽  
High Performance ◽  
High Performance Concrete ◽  
Laser Scanner ◽  
Plain Concrete ◽  
3D Models ◽  
Measured Data ◽  
Surface Measurement

Reverse engineering is a specialization which was developed a lot in the 21st century. The major aim is researching and describing the principals and procedures of process and structures. Reverse engineering in civil engineering is used to describe the applied loadings which caused corruption or failure of a structure or it is used to reconstruct 3D models of the original object. The aim of this paper is to compare response to static and impact loading of two materials, i.e. plain concrete and high-performance concrete (HPC), with respect to the fracture surface area. These areas were scanned by the 3D laser scanner and they were evaluated in the graphic programs. The main objective of this paper is a presentation of measured data, which can be used to determine the size of the applied loadings using reverse engineering.

The Optimization of Directly Buried Heating Pipe Elbow Based on the ANSYS

2015 ◽  
Vol 713-715 ◽  
pp. 187-190
Author(s):  
Yao Xiang Wang ◽  
Fei Wang ◽  
Guo Wei Wang ◽  
Yong Gang Lei
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Wall Thickness ◽  
Heating System ◽  
Buried Pipeline ◽  
Analysis Software ◽  
Element Analysis ◽  
Pipe Elbow ◽  
Different Types ◽  
New Type

The two problems restrict the development of directly buried pipeline installation without compensation technology in the heating engineering.Therefore, the intensity of elbow itself is analyzed to optimize the elbow .A new model of elbow is provided .This paper uses ANSYS finite element analysis software to establish a new type of elbow model.We compare and analyze the stress of ordinary elbow which add block and do not add block ; two different types which both have the same wall thickness and new type elbow which have 5 different wall thickness for each elbow.The results show that:(1) the new type elbow can reduce the stress greatly;(2) with the increasing diameter of elbow, the stress of inner elbow decreases gradually. Therefore, this new type of elbow can truly realize non-compensating installation in heating system.

scholarly journals INTEGRATION OF ACTIVE SENSORS FOR GEOMETRIC ANALYSIS OF THE CHAPEL OF THE HOLY SHROUD

2019 ◽  
Vol XLII-2/W15 ◽  
pp. 149-156 ◽  
Author(s):  
S. Barba ◽  
A. di Filippo ◽  
M. Limongiello ◽  
B. Messina
Keyword(s):  
Laser System ◽  
Geometric Analysis ◽  
Laser Scanner ◽  
3D Models ◽  
Active Sensors ◽  
Survey Techniques ◽  
Accuracy And Precision ◽  
Complex Process

<p><strong>Abstract.</strong> The digital acquisition of Cultural Heritage is a complex process, highly depending on the nature of the object as well as the purpose of its detection. Even if there are different survey techniques and sensors that allow the generation of realistic 3D models, defined by a good metric quality and a detail consistent with the geometric characteristics of the object, an interesting goal could be to develop a unified treatment of the methodologies. The Chapel of the Holy Shroud, with its intricate articulation, becomes the benchmark to test an integrated protocol between a terrestrial laser scanner (TLS) and a wearable mobile laser system (WMLS) based on a SLAM approach. In order to quantify the accuracy and precision of the latter solution, several forms of comparison are proposed. For the case study the ZEB-REVO, produced and marketed by GeoSLAM, is tested. Computations of cloud-to-cloud (C2C) absolute distances, comparisons of slices and extractions of planar features are performed, using stationary laser scanner (Faro Focus<sup>S</sup> S350) as a reference. Finally, the obtained results are reported, allowing us to assert that the quality of the WMLS measurements is compatible with the data provided by the manufacturer, thus making the instrumentation suitable for certain specific applications.</p>

scholarly journals Outside In

2009 ◽  
Vol 131 (08) ◽  
pp. 38-41
Author(s):  
Jean Thilmany
Keyword(s):  
Reverse Engineering ◽  
Computer Aided Design ◽  
Laser Scanner ◽  
Coordinate Measuring Machine ◽  
Physical Object ◽  
3D Cad ◽  
Engineering Software ◽  
Design Engineers ◽  
Computer Aided ◽  
Measuring Machine

This article discusses reverse engineering software is slowly changing the way design engineers do their everyday jobs. With the pervasiveness of computer-aided design packages, reverse engineering technology has become a practical tool to create a 3D virtual model of an existing physical part. This model is then available to be used in 3D CAD, computer-aided manufacturing, or other computer-aided engineering applications. The reverse engineering process needs hardware and software that work together. The hardware is used to measure an object, and the software reconstructs it as a 3D model. The physical object can be measured using 3D scanning technologies such as a coordinate measuring machine, laser scanner, structured light digitizer, or computed tomography. The wider accessibility of handheld-laser scanners and portable CMMs like the one used at Excel Foundry means more companies can afford reverse engineering for their own unique ends. The scanner has turned out to be equally useful for engineering and for local archeological and preservation projects; and so far, it has been used to help preserve endangered artifacts.

scholarly journals Geometric Analysis of Type B Aortic Dissections Shows Aortic Remodeling After Intervention Using Multilayer Stents

Materials ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2274
Author(s):  
Victor S. Costache ◽  
Jorn P. Meekel ◽  
Andreea Costache ◽  
Tatiana Melnic ◽  
Crina Solomon ◽  
...  
Keyword(s):  
Fluid Velocity ◽  
Geometric Analysis ◽  
False Lumen ◽  
3D Models ◽  
Type B ◽  
True Lumen ◽  
Element Analysis ◽  
Cfd Models ◽  
Aortic Dissections ◽  
Aortic Remodeling

Recently, multilayer stents for type B aortic dissections (TBAD) have been proposed to decrease false lumen flow, increase and streamline true lumen flow, and retain branch vessel patency. We aimed to provide a protocol with standardized techniques to investigate aortic remodeling of TBAD by multilayer flow modulators (MFM) in static geometric and hemodynamic analyses. Combining existing literature and new insights, a standardized protocol was designed. Using pre- and postoperative CT scans, geometric models were constructed, lumen dimensions were calculated, computational fluid dynamics (CFD) models were composed, and velocity and pressures were calculated. Sixteen TBAD cases treated with MFM were included for analysis. For each case, aortic remodeling was analyzed using post-processing medical imaging software. After 3D models were created, geometrical anatomical measurements were performed, and meshes for finite element analysis were generated. MFM cases were compared pre- and postoperatively; true lumen volumes increased (p < 0.001), false lumen volumes decreased (p = 0.001), true lumen diameter at the plane of maximum compression (PMC) increased (p < 0.001), and false lumen index decreased (p = 0.008). True lumen flow was streamlined, and the overall fluid velocity and pressures decreased (p < 0.001 and p = 0.006, respectively). This protocol provided a standardized method to evaluate the effects of MFM treatments in TBAD on geometric analyses, PMC, and CFD outcomes.

scholarly journals A RE Methodology to achieve Accurate Polygon Models and NURBS Surfaces by Applying Different Data Processing Techniques

Metals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1508
Author(s):  
Alejandro Pascual ◽  
Naiara Ortega ◽  
Soraya Plaza ◽  
Ibon Holgado ◽  
Jon Iñaki Arrizubieta
Keyword(s):  
Data Processing ◽  
Reverse Engineering ◽  
Data Acquisition ◽  
Laser Scanner ◽  
Point Clouds ◽  
3D Models ◽  
Machining Processes ◽  
Cross Sectional ◽  
Processing Step ◽  
Processing Techniques

The scope of this work is to present a reverse engineering (RE) methodology to achieve accurate polygon models for 3D printing or additive manufacturing (AM) applications, as well as NURBS (Non-Uniform Rational B-Splines) surfaces for advanced machining processes. The accuracy of the 3D models generated by this RE process depends on the data acquisition system, the scanning conditions and the data processing techniques. To carry out this study, workpieces of different material and geometry were selected, using X-ray computed tomography (XRCT) and a Laser Scanner (LS) as data acquisition systems for scanning purposes. Once this is done, this work focuses on the data processing step in order to assess the accuracy of applying different processing techniques. Special attention is given to the XRCT data processing step. For that reason, the models generated from the LS point clouds processing step were utilized as a reference to perform the deviation analysis. Nonetheless, the proposed methodology could be applied for both data inputs: 2D cross-sectional images and point clouds. Finally, the target outputs of this data processing chain were evaluated due to their own reverse engineering applications, highlighting the promising future of the proposed methodology.

A Study on Rotary Expanding Process of Large-Diameter Hot-Rolled Seamless Gas Cylinder with Finite Element Analysis

2011 ◽  
Vol 320 ◽  
pp. 45-51
Author(s):  
Shun Yao Jin ◽  
Zhong Guo Huang ◽  
Zong Ke Shao ◽  
Qing Hua Yuan ◽  
Jian Wei
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Wall Thickness ◽  
Large Diameter ◽  
3D Models ◽  
Steel Tube ◽  
Element Analysis ◽  
Thickness Uniformity ◽  
Gas Cylinder ◽  
Hot Rolled

This paper expounds the application of rotary expanding process to manufacture the large-diameter hot-rolled seamless gas cylinder. 3D drawing software CATIA-V5 is applied to build 3d models of steel tube and rolling tools. Deformation feature of rotary expanding process is analyzed by using MSC.Marc FEA (finite element analysis) software to simulate the rolling process. As a result, it provides a scientific theory for optimizing the rotary expanding process and improving the quality of steel tube. It proposes a novel method to calculate the wall thickness uniformity after finite element analysis. Marc’s second development function and FORTRAN software’s extracting finite element node coordinates function are applied to calculate the wall thickness uniformity. The rotary expanding process can control the wall thickness uniformity well. The wall thickness uniformity of steel tube after rolling is simulated well by using MSC.Marc FEA software, which can help the technologist to predict the influence of wall thickness uniformity owing to the change of process design, and to provide guidance for production.

The Helmet Reverse Forming and Static Characteristic Analysis

2013 ◽  
Vol 712-715 ◽  
pp. 1145-1148
Author(s):  
Shi Gang Wang ◽  
Guan Xiong Wu ◽  
Chao Cui ◽  
Xi Bing Li
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Reverse Engineering ◽  
Laser Scanner ◽  
Static Characteristic ◽  
Deformation Analysis ◽  
Test Problems ◽  
Characteristic Analysis ◽  
Element Analysis ◽  
Cloud Data

In order to solve irregular product surface quality is difficult to test problems, this paper combined reverse engineering with finite element analysis related technologies, good results have been achieved. Selected the helmet as the research object, introduced the reverse engineering and finite element analysis of the basic methods and ideas. First through the 3D laser scanner for safety helmet surface point cloud data, the data conducted the pretreatment in the Imageware software, and then in UG finished surface reconstruction and materialization process, finally guided the reverse forming helmet entity into Ansys Workbench software to carry on the finite element analysis, through the generation of stress and deformation analysis nephogram to test the sample quality.

The Fast Design and the Optimization of the Injection Mold Based on CAD and CAE Technology

2012 ◽  
Vol 430-432 ◽  
pp. 1352-1356
Author(s):  
Heng Tan ◽  
Ze Wang ◽  
Guo Hong Dai ◽  
Xiu Xiang Chen ◽  
Jian Fu Zhu
Keyword(s):  
Injection Molding ◽  
Reverse Engineering ◽  
Characteristic Curve ◽  
3D Models ◽  
Mold Design ◽  
Injection Mold ◽  
Plastic Model ◽  
Cloud Data ◽  
Engineering Software ◽  
Cae Technology

Using the reverse engineering software “Imageware”, the kakou points cloud data were processed, the characteristic curve grids were divided and the curve surfaces were reconstructed in the paper. Then the reconstructed plastic model of the kakou was inputed in UG. With the help of the repair functions for UG software, the incontinuous curve surfaces were sew up, then the STL style of the kakou was saved. Using Mold Wizards of the UG, the assemble model of the mold was established, the parting surfaces were designed, the 3D models of the mold parts were acquired. With the help of Moldflow, the injection molding of the kakou was simulated and analyzed. According to the results of simulation, the structures of mold and the technology parameters were optimized .The mold design was changed digital, virtual and modern design from tradition design based on paper and experience.

Sign in / Sign up

Export Citation Format

Share Document