scholarly journals Introduction of Open-Source Engineering Tools for the Structural Modeling of a Multilayer Mountaineering Ski under Operation

2020 ◽  
Vol 10 (15) ◽  
pp. 5310
Author(s):  
Lorenzo Fraccaroli ◽  
Franco Concli
Keyword(s):  
Open Source ◽  
Design Process ◽  
Open Source Software ◽  
Weight Reduction ◽  
Tensile Tests ◽  
Image Correlation ◽  
Virtual Model ◽  
Finite Elements Analysis ◽  
The Real ◽  
Dog Bone

Winter sports have significantly developed in the last century. Among others, skiing is a winter-sport branch in which the equipment makes the difference in the performances. While in the beginning of the last century skis were simply made of wood, nowadays the increasing demand of performances and weight reduction has promoted the adoption of composite materials. However, no significant progress has been made in the engineering approach to design such equipment which are very often still designed on the basis of several physical prototypes and trials. This is particularly true in the niche sector of ski mountaineering, where the production batches are significantly smaller with respect to those of alpine skis and at the same time the weight reduction plays a determinant role. In this context, finite elements analysis (FEA) could represent an important tool to shorten the development times and costs leading to a more effective design process. The aim of this research is the development of an accurate virtual model of an existing mountaineering ski, capable of reproducing the behavior of the real component under operation. A preliminary characterization of all the materials used for the different layers of the ski was performed via tensile tests on flat dog-bone-shaped samples in combination with digital image correlation (DIC) techniques. Samples were laser cut from sheets. The tensile tests were performed in the two principal directions for each material. In combination with DIC, these tests allowed us to estimate the four in-plane (XY) elastic properties, namely, the two elastic modules, the shear module, and the Poisson ratio (Ex, Ey, Gxy, νxy). The DIC acquisitions were elaborated with the free software GOM-Correlate. The digital model of the ski was created and simulated in an open-source environment: Code_Aster/Salome-Meca. The reason for using an open-source software is the possibility to parallelize the calculation without restrictions due to licenses and to customize the code according to the specific problem of interest. These aspects underline the potential of open-source software to improve the design process. The results of the simulations were compared with the response of the real ski in a three-point bending and a torsion-bending tests. Differences of 2.5–10% with respect to the real ski were observed for the different modeling techniques. Moreover, the validated virtual model of the ski was used to study the behavior of the ski when interacting with the snow for different roll angles and loads.

scholarly journals An Open Source Software for the Measurement of Deformation Fields by Means of Digital Image Correlation

2013 ◽  
Vol 19 (S2) ◽  
pp. 820-821 ◽  
Author(s):  
N. Vanderesse ◽  
M. Lagacé ◽  
F. Bridier ◽  
P. Bocher
Keyword(s):  
Digital Image Correlation ◽  
Open Source ◽  
Open Source Software ◽  
Digital Image ◽  
Image Correlation

Extended abstract of a paper presented at Microscopy and Microanalysis 2013 in Indianapolis, Indiana, USA, August 4 – August 8, 2013.

scholarly journals Methodology for creating 3D paper unfolded models with complex geometry using open-source software and resources with free personal and commercial license

2018 ◽  
Vol 2 (1) ◽  
pp. 39-46
Author(s):  
Kremena Tsankova Markova ◽  
Tihomir Atanassov Dovramadjiev ◽  
Ginka Velikova Jecheva
Keyword(s):  
Exact Sequence ◽  
Open Source ◽  
Design Process ◽  
Open Source Software ◽  
Complex Geometry ◽  
Three Dimensional ◽  
Functional Capabilities ◽  
The Creation ◽  
Technological Means ◽  
Three Dimensional Models

The creation of 3D paper unfolded models with complex geometry requires precision in the design process. Achieving this is through the use of accessible resources and modern technological means which possess the necessary technical and functional capabilities. The successful realization of the models is through the use of a structured methodology containing design stages that are defined in the exact sequence. The present study aims to create the unfoldings of complex three-dimensional models by covering the stages of providing accessible resurses with a personal and commercial license that are transformed in sequence until the ready-made variants.

scholarly journals Measurement and Analysis of Heterogeneous Strain Fields in Uniaxial Tensile Tests for Boron Steel Under Hot Stamping Conditions

2020 ◽  
Vol 60 (9) ◽  
pp. 1289-1300
Author(s):  
R. Zhang ◽  
Z. Shao ◽  
J. Lin ◽  
T. A. Dean
Keyword(s):  
Temperature Gradient ◽  
Hot Stamping ◽  
Tensile Tests ◽  
Gauge Length ◽  
Image Correlation ◽  
Effect Of Temperature ◽  
Uniaxial Tensile ◽  
Boron Steel ◽  
Strain Fields ◽  
Dog Bone

Abstract Background A significant amount of uniaxial tensile tests has been carried out using Gleeble systems to investigate the viscoplastic deformation of boron steel (22MnB5) under hot stamping conditions. However, due to heat loss through the end clamps, a temperature gradient in the reduced parallel section of dog-bone shaped specimens is inevitable. Objective In the work reported in this paper, the effect of temperature gradient on measured outcomes is examined. Methods Uniaxial tensile tests on 1.5 mm thick boron steel specimens are carried out, under hot stamping conditions and strain fields are quantified using the digital image correlation (DIC) technique. The effect of gauge length on the properties of boron steel, as calculated from observed test results, is determined. Results Compared with the test at room temperature, a bell-shaped strain distribution occurs within the gauge length even before the appearance of the maximum load. Also, average strain within the gauge length, especially in the later stages, changes with gauge length within the investigated range, and thus, different engineering stress-strain curves and fracture strains are determined. In addition, normalized strain rate is significantly dependent on gauge length, which results in over 16% difference among the computed flow stresses by using a unified constitutive model. Conclusions The characterized properties of the material are dependent on gauge length and thus, a testing standard for measuring thermal-mechanical data of materials by using a Gleeble need to be defined.

Demonstration of an Aerodynamic Design Process for Turbomachines Using Open Source Software Tools

2010 ◽  
Author(s):  
Oliver Borm ◽  
Balint Balassa ◽  
Sebastian Barthmes ◽  
Julius Fellerhoff ◽  
Andreas Ku¨hrmann ◽  
...  
Keyword(s):  
Open Source ◽  
Design Process ◽  
Open Source Software ◽  
Compressible Flows ◽  
Three Dimensional ◽  
Axial Compressor ◽  
Software Tools ◽  
Two Dimensional ◽  
Aerodynamic Design ◽  
Student Projects

This paper demonstrates an aerodynamic design process for turbomachines for compressible flows, using exclusively open source software tools. Some relevant software already existed and few additional components were required, which have been developed mainly by students and are available at ftp.lfa.mw.tum.de. The geometry of turbomachine blades is described with a newly developed NURBS based blade designer. One-dimensional preliminary analysis is done with OpenOffice.org Calc and an extended mean line program, where loss models are already included. For two-dimensional through-flow computations a compressible streamline curvature method was implemented. Two-dimensional blade-to-blade and three-dimensional simulations are performed with the CFD toolbox OpenFOAM. The two- and three-dimensional results are visualized and analyzed using the open source postprocessing tool ParaView. The presented tools are regularly used in student projects. A generic one stage axial compressor was created with the workflow as a showcase in order to demonstrate the capabilities of the open source software tools.

scholarly journals Open Source Software for the Real-Time Control, Processing, and Visualization of High-Volume Electrochemical Data

2019 ◽  
Vol 91 (19) ◽  
pp. 12321-12328 ◽  
Author(s):  
Samuel D. Curtis ◽  
Kyle L. Ploense ◽  
Martin Kurnik ◽  
Gabriel Ortega ◽  
Claudio Parolo ◽  
...  
Keyword(s):  
Open Source ◽  
Real Time ◽  
Open Source Software ◽  
High Volume ◽  
Real Time Control ◽  
The Real ◽  
Time Control

Analysis of Tensile Test of Titanium EBW Sheet

2015 ◽  
Vol 639 ◽  
pp. 339-346 ◽  
Author(s):  
Janina Adamus ◽  
Maciej Motyka
Keyword(s):  
Uniaxial Tension ◽  
Weight Reduction ◽  
Electron Beam Welding ◽  
Pure Titanium ◽  
Experimental Tests ◽  
Tensile Tests ◽  
Mechanical Analysis ◽  
Image Correlation ◽  
Commercially Pure Titanium ◽  
Technical Literature

The continuous pursuit of vehicle weight reduction forces the industry to look for alternative materials to steel. Light alloys such as aluminium or titanium are materials that provide a decrease in weight using conventional technologies. Additional weight reduction results from using tailor-welded blanks (TWB). While the joining and forming steel or even aluminium TWBs is quite well known and described in the technical literature, joining and forming titanium TWBs still poses a significant problem. In the paper, experimental tests carried out with welded samples manufactured from commercially pure titanium Gr 2 and titanium alloy Gr 5 sheets are presented. The samples were joined by electron beam welding. Mechanical testing and optical microscopy were used to characterise the welds and the base metal of the samples. The samples were subjected to uniaxial tension up to final failure. The 3‑D Digital Image Correlation system ARAMIS was used for monitoring the whole deformation process. This makes it possible for real-time observation of sample deformation. The test results and the numerical analysis of the tensile tests are compared. The numerical simulations were carried out with the ADINA System based on the Finite Element Method (FEM). The mechanical analysis leads to calculation of the strain state after sample deformation in uniaxial tension (mechanical model).

Open Source 3D Scanning and Printing for Design Capture and Realization

2014 ◽  
Author(s):  
Conrad S. Tucker ◽  
David B. Saint John ◽  
Ishan Behoora ◽  
Alexandre Marcireau
Keyword(s):  
Open Source ◽  
Engineering Design ◽  
Design Process ◽  
Open Source Software ◽  
Low Cost ◽  
3D Scanning ◽  
Management Approach ◽  
Potential Candidate ◽  
Engineering Design Process ◽  
3D Scanners

Traditionally, the complexities and costs associated with design conceptualization (e.g., 3D scanning) and design realization (e.g., 3D printing) have limited the diversity of individuals capable of participating in the process to individuals/entities with advanced technical backgrounds or substantial financial resources. The authors of this work propose a methodology that utilizes low cost hardware and open source software to make the capture, reuse and management of design knowledge more accessible to the general public. 3D scanners are digital tools that facilitate the conversion of physical object information into the digital space through multiple image capture techniques. 3D scanners have the potential to revolutionize design conceptualization in society by enabling individuals to seamlessly transform physical representations of objects into a digital 3D rendered version. The 3D rendered version can then be manipulated using existing 3D CAD tools (e.g., SolidWorks) and subsequently printed using a 3D printer. Design realization via 3D printers (e.g., RepRaps) is becoming an integral aspect of the engineering design process. While the conceptualization of designs (e.g. CAD models) helps designers visually experience potential candidate designs, product prototypes that can actually be touched and manipulated add an important ‘feedback’ dimension to the engineering design process. This scan-edit-print approach to design conceptualization and realization will enable designers collaborating in online environments to work towards achieving a common design by providing them with tools and techniques. A case study is presented that demonstrates the feasibility of the scan (knowledge capture), edit (knowledge reuse) and print (knowledge management) approach to design using low cost hardware and open source software.

Sign in / Sign up

Export Citation Format

Share Document