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CAD Modeling and CAE Simulation
Published in Jose Martin Herrera Ramirez, Luis Adrian Zuñiga Aviles, Designing Small Weapons, 2022
Jose Martin Herrera Ramirez, Luis Adrian Zuñiga Aviles
Formerly, there was a documentation section in the software CAD, which allowed to generate a Word® document to explain important aspects of design. Today, CAD software as SolidWorks® includes tools to insert notes and markups on a CAD model. A report is a document to detail results and diagnosis. A CAD report shows the results of interference, sustainability, or geometric comparison reports, while a CAE report describes the simulation results. The location of this file depends on each software, but, in general, the reports are saved in the report manager. In some cases, the report manager is called the report generator, as is the name in Ansys®. NX Nastran® and Femap® call it the user-defined report generation. The customization of the report is fundamental to formalize, clearly display the results, and integrate the company logos.
Design of Biodegradable Mg Alloy Implants with Finite Element Analysis
Published in Yufeng Zheng, Magnesium Alloys as Degradable Biomaterials, 2015
In mathematics, the finite element method (FEM) is a numerical technique for finding approximate solutions to boundary value problems for differential equations. It uses variational methods (the calculus of variations) to minimize an error function and produce a stable solution. Analogous to the idea that connecting many tiny straight lines can approximate a larger circle, FEM encompasses all the methods for connecting many simple element equations over many small subdomains, named finite elements, to approximate a more complex equation over a larger domain. Finite element analysis (FEA) has been widely used for the testing and optimization of biomedical device designs for its low costs and high efficiency compared to the conventional prototype testing. Abaqus, Ansys, Adina, Hypermesh, Femap/NX Nastran, and some other FEA software are often used in this area.
Benchmark study on considering welding-induced distortion in structural stress analysis of thin-plate structures
Published in C. Guedes Soares, Y. Garbatov, Progress in the Analysis and Design of Marine Structures, 2017
I. Lillemäe-Avi, H. Remes, Y. Dong, Y. Garbatov, Y. Quéméner, L. Eggert, Q. Sheng, J. Yue
For calculating the hot spot stress the 2D plane stress sub-models with the mesh size varying from 0.1 mm in the notch to 0.8 mm at the boundaries were created at the fatigue critical area along the butt weld. The displacements from the geometrically nonlinear panel model were applied on the boundaries of the local linear models. The hot spot stress was defined using linear extrapolation of maximum principal stress according to IIW (Hobbacher, 2009), i.e. using points 0.4t and 1.0t from the fatigue critical notch. For both panel and local models Femap 11.0 was used for pre- and post-processing and Abaqus 6.13 for analysis. The FE-models and the analysis procedure are presented in Figure 7.
Optimisation of passenger ship structures in concept design stage
Published in Ships and Offshore Structures, 2019
Joni Raikunen, Eero Avi, Heikki Remes, Jani Romanoff, Ingrit Lillemäe-Avi, Ari Niemelä
The optimisation process is carried out with a user-defined Matlab-routine which links together the FE-model creation, response and strength evaluation and PSO algorithm. The models are created and analysed using commercial FE software FEMAP with NX Nastran. Flowchart of the optimisation process is presented in Figure 6.