A coupled thermo-mechanical pseudo inverse approach for preform design in forging

Thomas, Anoop Ebey; Abbès, Boussad; Li, Yu Ming; Abbès, Fazilay; Guo, Ying; Duval, Jean‐Louis

doi:10.1063/1.5008202

Cited by 1 publication

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“…This is because the inverse analysis requires a large number of similar FEM tasks, especially when identifying complex materials (Pokorska, 2007). Another type of inverse problems is associated with the determination of process parameters that lead to a given resultfor example, to the necessary metal forming (Thomas et al, 2017). An interesting example in this sense is the relatively new process of laser dieless drawing of thin wire.…”

Section: Introductionmentioning

confidence: 99%

Parallel Solution of Thermomechanical Inverse Problems for Laser Dieless Drawing of Ultra-Thin Wire

Milenin

2022

acs

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The paper discusses the solving of inverse thermomechanical problems requiring a large number of FEM tasks with various boundary conditions. The study examined the case when all tasks have the same number of nodes, finite elements, and nodal connections. In this study, the speedup of the solution of the inverse problem is achieved in two ways: 1. The solution of all FEM tasks in parallel mode. 2. The use by all FEM tasks a common matrix with addresses of nonzero elements in the stiffness matrices. These algorithms are implemented in the own FEM code, designed to solve inverse problems of the hot metal forming. The calculations showed that developed code in parallel mode is effective for the number of tasks late than 0,7-0,9 of the number of available processors. Thus, at some point, it becomes effective to use a sequential solution to all tasks and to use a common matrix of addresses of nonzero elements in the stiffness matrix. The achieved acceleration at the optimal choice of the algorithm is 2–10 times compared with the classical multivariate calculations in the FEM. The paper provides an example of the practical application of the developed code for calculating the allowable processing maps for laser dieless drawing of ultra-thin wire from copper alloy by solving the thermomechanical inverse problem. The achieved acceleration made it possible to use the developed parallel code in the control software of the laboratory setup for laser dieless drawing.

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Section: Introductionmentioning

confidence: 99%

Parallel Solution of Thermomechanical Inverse Problems for Laser Dieless Drawing of Ultra-Thin Wire

Milenin

2022

acs

View full text Add to dashboard Cite

show abstract

A coupled thermo-mechanical pseudo inverse approach for preform design in forging

Cited by 1 publication

References 5 publications

Parallel Solution of Thermomechanical Inverse Problems for Laser Dieless Drawing of Ultra-Thin Wire

Parallel Solution of Thermomechanical Inverse Problems for Laser Dieless Drawing of Ultra-Thin Wire

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