Open Access
Improving Computational Performance through HPC Techniques: case study using DD3IMP in-house code
Rua Luís,Reis Santos +1 more
- 01 Jan 2011
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TL;DR: The procedure adopted to identify the main computational bottlenecks of the FE solver in order to introduce the OpenMP directives and, consequently, to achieve a major speedup of the whole algorithm is described.
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Abstract: The computational efficiency of the FEA is strongly dependent on the algorithmic and numerical efficiency of the FE solver. This is particularly important in case of implicit FE codes, such as DD3IMP, the in-house static implicit FE solver under analysis in this work. This study describes the procedure adopted to identify the main computational bottlenecks of the FE solver in order to introduce the OpenMP directives and, consequently, to achieve a major speedup of the whole algorithm. The different parallelized branches of the code are tested using the well-known square cup deep drawing example, considering different FE discretizations. The analysis of the preliminary results, concerning the CPU wall time, allows to demonstrate that the adoption of HPC techniques, such as the abovementioned OpenMP directives, enables to: (i) achieve a speedup factor close to the number of cores (in a single computer); (ii) solve a problem in a shorter time; (iii) solve a bigger problem in the same amount of time and, thus, (iv) achieve a better solution in a given amount of time.
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Citations
Surface Smoothing Procedures in Computational Contact Mechanics
TL;DR: In this article, the authors address the problems arising in the finite element simulation of contact problems undergoing large deformation by using the Node-to-Nagata contact elements to regularize the variational frictional contact problem.
55
Applying Nagata patches to smooth discretized surfaces used in 3D frictional contact problems
TL;DR: The results show the significant improvements attained with the proposed approach, in terms of efficiency, robustness and accuracy, when compared with the traditional faceted contact surfaces description, as well as the developed global and local contact search algorithms.
49
Structural monitoring and modeling of the mechanical deformation of three-dimensional printed poly(ε-caprolactone) scaffolds.
João F M Ribeiro,Sara M. Oliveira,José Alves,A. J. Pedro,Rui L. Reis,Emanuel M. Fernandes,João F. Mano +6 more
TL;DR: The methodology proposed in this study using 3D printed scaffolds with compressionCT device and FEA is a framework that offers great potential in understanding the mechanical and structural behavior of soft systems for different applications, including for the biomedical engineering field.
Improving Nagata patch interpolation applied for tool surface description in sheet metal forming simulation
TL;DR: A methodology to control the Nagata patch interpolation of piecewise linear meshes is proposed, in order to improve its applicability for tool surface description used in the numerical simulation of sheet metal forming processes.
29
Comparing faceted and smoothed tool surface descriptions in sheet metal forming simulation
TL;DR: This study deals with different tool surface description methods used in the finite element analysis of sheet metal forming processes, compared with two distinct smooth surface description approaches: Bézier patches obtained from the Computer-Aided Design model and Nagata patches.
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