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Experimental validation of the new modular application of the upper bound theorem in indentation.

Bermudo C, Martín F, Martín MJ, Sevilla L - PLoS ONE (2015)

Bottom Line: The analytical model is originated from the Upper Bound Theorem application by means of its new modular distribution.The experimental validation is performed through a series of indentation tests with work-pieces of annealed aluminium EN AW-2030 and punches of steel AISI 304, under plane strain conditions.The results are compared with the ones obtained from the application of this new modular distribution of the Upper Bound Theorem, showing a good approximation and suitability of the model developed for an indentation-based process.

View Article: PubMed Central - PubMed

Affiliation: Department of Civil, Material and Manufacturing Engineering, University of Malaga, Malaga, Spain.

ABSTRACT
Nowadays, thanks to the new manufacturing processes, indentation is becoming an essential part of the new arising processes such as the Incremental Forming Processes. This work presents the experimental validation of the analytical model developed for an indentation-based process. The analytical model is originated from the Upper Bound Theorem application by means of its new modular distribution. The modules considered are composed of two Triangular Rigid Zones each. The experimental validation is performed through a series of indentation tests with work-pieces of annealed aluminium EN AW-2030 and punches of steel AISI 304, under plane strain conditions. The results are compared with the ones obtained from the application of this new modular distribution of the Upper Bound Theorem, showing a good approximation and suitability of the model developed for an indentation-based process.

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Tensile test.Tensile samples used for the tensile test.
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pone.0122790.g005: Tensile test.Tensile samples used for the tensile test.

Mentions: In addition to this, the correct implementation of the new modular distribution of the UBT requires knowing both, the strength coefficient K and the strain-hardening (or work-hardening) exponent n of the new aluminium obtained after the annealing process. Since the characteristics of the aluminium obtained after the annealed treatment are different from the one considered before and consequently the n and K coefficients are also different and unknown, a series of tensile tests are implemented in order to acknowledge them (Fig 5). To this effect, a set of tensile samples (Fig 5) are manufactured according to the UNE-EN ISO 6892–1 [19] (Table 1) which undergo the same cycle annealing as the work-pieces.


Experimental validation of the new modular application of the upper bound theorem in indentation.

Bermudo C, Martín F, Martín MJ, Sevilla L - PLoS ONE (2015)

Tensile test.Tensile samples used for the tensile test.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4380347&req=5

pone.0122790.g005: Tensile test.Tensile samples used for the tensile test.
Mentions: In addition to this, the correct implementation of the new modular distribution of the UBT requires knowing both, the strength coefficient K and the strain-hardening (or work-hardening) exponent n of the new aluminium obtained after the annealing process. Since the characteristics of the aluminium obtained after the annealed treatment are different from the one considered before and consequently the n and K coefficients are also different and unknown, a series of tensile tests are implemented in order to acknowledge them (Fig 5). To this effect, a set of tensile samples (Fig 5) are manufactured according to the UNE-EN ISO 6892–1 [19] (Table 1) which undergo the same cycle annealing as the work-pieces.

Bottom Line: The analytical model is originated from the Upper Bound Theorem application by means of its new modular distribution.The experimental validation is performed through a series of indentation tests with work-pieces of annealed aluminium EN AW-2030 and punches of steel AISI 304, under plane strain conditions.The results are compared with the ones obtained from the application of this new modular distribution of the Upper Bound Theorem, showing a good approximation and suitability of the model developed for an indentation-based process.

View Article: PubMed Central - PubMed

Affiliation: Department of Civil, Material and Manufacturing Engineering, University of Malaga, Malaga, Spain.

ABSTRACT
Nowadays, thanks to the new manufacturing processes, indentation is becoming an essential part of the new arising processes such as the Incremental Forming Processes. This work presents the experimental validation of the analytical model developed for an indentation-based process. The analytical model is originated from the Upper Bound Theorem application by means of its new modular distribution. The modules considered are composed of two Triangular Rigid Zones each. The experimental validation is performed through a series of indentation tests with work-pieces of annealed aluminium EN AW-2030 and punches of steel AISI 304, under plane strain conditions. The results are compared with the ones obtained from the application of this new modular distribution of the Upper Bound Theorem, showing a good approximation and suitability of the model developed for an indentation-based process.

No MeSH data available.


Related in: MedlinePlus