Topology-Oriented Deformation of FE-Meshes in Iterative Reverse Engineering Processes

2012 ◽  
Author(s):  
Matthias Klaus ◽  
Stefan Holtzhausen ◽  
Christine Schöne ◽  
Ralph Stelzer
Keyword(s):  
Finite Element ◽  
Product Development ◽  
Reverse Engineering ◽  
Optimum Result ◽  
Research Activities ◽  
Cad Models ◽  
Development Processes ◽  
Material Element ◽  
Scan Data ◽  
Finite Element Meshing

Reverse Engineering methods are becoming more and more important in product development processes in cases without CAD models or modified physical objects. For numerical calculations of scanned components, using, for instance, the Finite Element Method (FEM) to look at strength or vibration characteristics, we need the previously scanned data, obtained via Geometric Reverse Engineering, to be converted into CAD surface data, a Finite Element-meshing and a determination of material parameters and constraints. Tremendous effort must be expended in the course of performing repeated Geometric Reverse Engineering and FE-meshing, which must be done when there are iterative, largely local changes in real geometry (such as when incorporating forming dies) or in the case of topologically similar objects, which must be scanned again and again. This project is aimed at the generation of new calculation models using an appropriate adaption of existing FE meshes (made using a CAD model, for example) or FE meshes previously created with the help of scan data through the retention of intelligent meshing (constraints, material, element type etc.). In terms of their topology, these new meshes should adapt themselves to changes in geometry. Time-consuming Geometric Reverse Engineering, as well as re-meshing, can thus be bypassed. Product development cycles frequently proceed in an iterative manner. Repetition of process steps is intended to improve the product in order to achieve an optimum result in design and dimensioning. The goal of these research activities is to reduce the process steps from 3D scan data to FE-meshing, in particular in development cycles. The paper introduces the project’s concept, its initial results, and further steps.

scholarly journals Enriching Assembly CAD Models With Functional and Mechanical Informations to Ease CAE

2010 ◽  
Author(s):  
Gilles Foucault ◽  
Jean-Claude Le´on
Keyword(s):  
Product Development ◽  
Geometric Constraints ◽  
Geometric Models ◽  
Bill Of Materials ◽  
Starting Point ◽  
Cad Models ◽  
Development Processes ◽  
Mechanical Information ◽  
Standard Components ◽  
Assembly Models

Assembly models can be regarded as a kernel for product development processes where they can efficiently contribute to many product simulation behaviors. Assembly models are often containing 3D B-Rep CAD models, possibly with geometric constraints between the components and bill of materials. However, these models are often difficult to process for simulations because algorithms often face a very large diversity of configurations. One origin of such difficulties can be found in companies’ practice where components may be represented differently from one company to another and their interfaces as well. In any case, interfaces between components are not explicit, which leads to tedious model processing tasks. This paper illustrates preparation of assembly models to ease CAE through an analysis of company practices, showing that a concept of conventional representations is an important starting point to efficient treatments of assemblies. In addition, it is described how interfaces and conventional representations can be combined to derive functional and mechanical information from geometric models of components. Illustrations of the proposed approach is given throughout the paper using various standard components.

Automated Finite Element Model Mesh Updating Scheme Applicable to Mistuning Analysis

2014 ◽  
Author(s):  
Alexander A. Kaszynski ◽  
Joseph A. Beck ◽  
Jeffrey M. Brown
Keyword(s):  
Finite Element ◽  
Computer Aided Design ◽  
User Involvement ◽  
Element Model ◽  
Cad Model ◽  
Data Set ◽  
Optical Scanner ◽  
Wide Range ◽  
Cad Models ◽  
Scan Data

Advancement of optical geometric measurement hardware has enabled the construction of accurate 3D tessellated models for a wide range of turbomachinery components. These tessellated models can be reverse-engineered into computer-aided design (CAD) models and input into grid generation software for finite element analyses. However, generating a CAD model from scan data is a time consuming and cumbersome process requiring significant user-involvement for even a single model. While it is possible to generate finite element models (FEMs) directly from tessellated data, current direct-grid methods produce unstructured grids that can introduce fictitious, numerical mistuning in these models, obscuring geometric mistuning. Nonetheless, as-measured scan data captured in a structured grid is essential for accurate geometric mistuning analyses, provided the tessellated scan data can be rapidly and accurately transformed into a FEM. This paper outlines and demonstrates an approach for rapidly generating structured FEMs for a population of integrally bladed rotors (IBRs) without requiring the arduous task of generating a CAD model for each as-measured IBR. This is accomplished by morphing the structured mesh of a nominal model to the tessellated data set collected from an optical scanner. It is shown that the fidelity and structure of these FEMs can be utilized for accurate mistuning analyses.

scholarly journals Reverse Engineering on Jet Engine Turbine Blade Based on 3D Printing Design Intent

2019 ◽  
Vol 8 (12) ◽  
pp. 5806-5810
Keyword(s):  
3D Printing ◽  
Reverse Engineering ◽  
Turbine Blade ◽  
3D Scanning ◽  
Cad Model ◽  
Cloud Data ◽  
Engineering Software ◽  
Aero Engine ◽  
Cad Models ◽  
Scan Data

Reverse engineering plays a significant role in rebuilding of a product. This suggests a situation arranged for reverse engineering of turbine blade used in aero engine components. It is the process that designs by using point cloud data to get CAD models. Reverse Engineering is a method for creating CAD model of physical parts whose designs are not available or fractured or damaged parts by digitizing a persisting prototype, reverse engineering creates a computer model by applying 3D scanning. In this paper it is for reproducing the geometries of aero engine physical components i.e. turbine blade in digitizing process through 3D Scanning and CMM Inspection. Complete transformation of physical data into CAD models by applying modern measuring machines and with its integrated software (Creo 2.0) extraction of information about geometry to develop the part models. CMM inspection & reverse engineering software be located active to evaluate any dimension deformation. The deviation in the dimension is taken into attention as evaluating characteristics. The error analysis of some features between 3D scan data, CMM, CAD model and MESH data are performed. The deviation between scan data, CAD model & CMM are within the suitable limits and deformation between CAD model & MESH data are within -0.1 to +0.1mm. The CAD model generated is within suitable criteria i.e., 30 microns. Parts which require to reverse engineered. After completion of the CAD model 3D printing development is done.

Product Modeling, Evaluation and Validation at the Detailed Design Stage

2011 ◽  
Author(s):  
Cristian Iorga ◽  
Alain Desrochers
Keyword(s):  
Product Development ◽  
Design Process ◽  
Design Stage ◽  
Product Modeling ◽  
Specific Product ◽  
Development Processes ◽  
Product Variation ◽  
Process Methodology ◽  
Capstone Projects ◽  
Short Time

The expansion of the markets corroborated with product customization and short time to launch the product have led to new levels of competition among product development companies. To be successful in the globalization of the markets and to enable the evaluation and validation of products, companies have to develop methodologies focused on lifecycle analysis and reduction of product variation to obtain both quality and robustness of products. Keywords: Modeling, Evaluation, Validation, Design ProcessThis paper proposes a new design process methodology that unifies theoretical results of modeling stage and empirical findings obtained from the validation stage. The evaluations and validations of engineering design are very important and they have a high influence on product performances and their functionality, as well on the customer perceptions.Given that most companies maintain the confidentiality of their product development processes and that the existing literature does not provide more detailed aspects of this field, the proposed methodology will represent a technical and logistical support intended for students or engineers involved in academic as well as industrial projects.A generic methodology will be refined based on a new approach that will take into consideration the specification types (quantitative or qualitative), the design objectives and the product types: new/improved, structural/esthetic. Hence the new generic methodology will be composed of specific product validation algorithms taking into account the above considerations. At the end of this paper, the improvements provided by the proposed methodology into the design process will be shown in the context of the engineering student capstone projects at the Université de Sherbrooke.

scholarly journals Potential and limitations of finite element modelling in assessing structural integrity of coralline algae under future global change

2015 ◽  
Vol 12 (19) ◽  
pp. 5871-5883 ◽  
Author(s):  
L. A. Melbourne ◽  
J. Griffin ◽  
D. N. Schmidt ◽  
E. J. Rayfield
Keyword(s):  
Climate Change ◽  
Finite Element ◽  
Structural Integrity ◽  
Geometric Model ◽  
Algal Growth ◽  
Coralline Algae ◽  
Rocky Shores ◽  
Element Analysis ◽  
Scan Data ◽  
The Impact

Abstract. Coralline algae are important habitat formers found on all rocky shores. While the impact of future ocean acidification on the physiological performance of the species has been well studied, little research has focused on potential changes in structural integrity in response to climate change. A previous study using 2-D Finite Element Analysis (FEA) suggested increased vulnerability to fracture (by wave action or boring) in algae grown under high CO2 conditions. To assess how realistically 2-D simplified models represent structural performance, a series of increasingly biologically accurate 3-D FE models that represent different aspects of coralline algal growth were developed. Simplified geometric 3-D models of the genus Lithothamnion were compared to models created from computed tomography (CT) scan data of the same genus. The biologically accurate model and the simplified geometric model representing individual cells had similar average stresses and stress distributions, emphasising the importance of the cell walls in dissipating the stress throughout the structure. In contrast models without the accurate representation of the cell geometry resulted in larger stress and strain results. Our more complex 3-D model reiterated the potential of climate change to diminish the structural integrity of the organism. This suggests that under future environmental conditions the weakening of the coralline algal skeleton along with increased external pressures (wave and bioerosion) may negatively influence the ability for coralline algae to maintain a habitat able to sustain high levels of biodiversity.

scholarly journals Finite element modelling of microstructural changes during equal channel angular drawing of pure aluminium

2021 ◽  
Author(s):  
Serafino Caruso ◽  
Stano Imbrogno
Keyword(s):  
Plastic Deformation ◽  
Grain Size ◽  
Finite Element ◽  
Size Variation ◽  
Fe Model ◽  
Pure Aluminium ◽  
Continuous Dynamic Recrystallization ◽  
Research Activities ◽  
Hardness Change ◽  
Continuous Dynamic

AbstractGrain refinement by severe plastic deformation (SPD) techniques, as a mechanism to control microstructure (recrystallization, grain size changes,…) and mechanical properties (yield strength, ultimate tensile strength, strain, hardness variation…) of pure aluminium conductor wires, is a topic of great interest for both academic and industrial research activities. This paper presents an innovative finite element (FE) model able to describe the microstructural evolution and the continuous dynamic recrystallization (CDRX) that occur during equal channel angular drawing (ECAD) of commercial 1370 pure aluminium (99.7% Al). A user subroutine has been developed based on the continuum mechanical model and the Hall-Petch (H-P) equations to predict grain size variation and hardness change. The model is validated by comparison with the experimental results and a predictive analysis is conducted varying the channel die angles. The study provides an accurate prediction of both the thermo-mechanical and the microstructural phenomena that occur during the process characterized by large plastic deformation.

Critical Success Factors of New Product Development and Impact on Performance of Malaysian Automotive Industry

2014 ◽  
Vol 903 ◽  
pp. 431-437 ◽  
Author(s):  
Abdul Aziz Fazilah ◽  
Nur Najmiyah Jaafar ◽  
Sulaiman Suraya
Keyword(s):  
Product Development ◽  
New Product Development ◽  
Automotive Industry ◽  
Critical Success Factors ◽  
Success Factors ◽  
New Product ◽  
Success Factor ◽  
Management Support ◽  
Critical Success ◽  
Research Activities

This research paper shows a framework to conduct an empirical study in Malaysian automotive industry in order to improve their performance. There are factors which are effective factors in improving performance of Malaysian automotive companies namely top management support, cross functional teamwork, new product development (NPD) process, NPD strategies, and market research activities. The critical success factor of NPD is playing a fundamental role in determining the performance in Malaysian automotive companies. In this research study, a framework has been developed that includes critical success factors of NPD and project achievement to study their influence on the performance of Malaysian automotive companies. It is hoped that this paper can provide an academic source for both academicians and managers due to investigate the relationship between critical success factors of total NPD, project achievement and company performance in a systematic manner to increase successful rate of NPD progress.

PRODUCT DEVELOPMENT IN OPEN DESIGN COMMUNITIES: A PROCESS PERSPECTIVE

2011 ◽  
Vol 08 (04) ◽  
pp. 557-575 ◽  
Author(s):  
CHRISTINA RAASCH
Keyword(s):  
Product Development ◽  
Open Source ◽  
Low Cost ◽  
Industrial Practice ◽  
Open Design ◽  
Open Development ◽  
Development Processes ◽  
Design Projects ◽  
Process Perspective ◽  
Significant Attention

Open source (OS) has raised significant attention in industrial practice and in scholarly research as a new and successful mode of product development. This paper is among the first to study open source development processes outside their original context, the software industry. In particular, we investigate the development of tangible products in so-called open design projects. We study how open design projects address the challenges usually put forward in the literature as barriers to the open development of tangible products. The analysis rests on the comparative qualitative investigation of four cases from different industries. We find that, subject to certain contingencies, open design processes can be organized to resemble OSS development processes to a considerable degree. Some practices are established specifically to uphold OS principles in the open design context, while others starkly differ from those found in OSS development. Our discussion focusses on different aspects of modularity as well as the availability of low-cost tools.

Coordination of Complex Product Development Processes

2010 ◽  
Author(s):  
Samuel Suss ◽  
Vincent Thomson
Keyword(s):  
Product Development ◽  
Product Development Process ◽  
Complex Products ◽  
Complex Processes ◽  
The Status ◽  
Development Processes ◽  
Correct Understanding ◽  
Vital Element ◽  
Insight Into ◽  
Product Development Processes

Product development processes of complex products are complex themselves and particularly difficult to plan and manage effectively. Although many organizations manage their product development processes by monitoring the status of documents that are created as deliverables, in fact the progress of the process is in large part based on the actual information flow which is required to develop the product and produce the documents. A vital element in making product development processes work well is the correct understanding of how information flows and how to facilitate its development. In this paper we describe an executable stochastic model of the product development process that incorporates the salient features of the interplay between the information development, exchange and progress of the technical work. Experiments with the model provide insight into the mechanisms that drive these complex processes.

Sign in / Sign up

Export Citation Format

Share Document