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Papers by VICTOR HUGO MERCADO LEMUS

Revista de Ciencias Tecnológicas, 2022

Repairs and redesigns for plastic injection molding parts generally is a short and straightforwar... more Repairs and redesigns for plastic injection molding parts generally is a short and straightforward process consisting of inspection, modeling, and evaluation. The present paper implements a methodology for redesigning and repairing injection molding parts based on the frontal process for developing concepts. The proposed methodology helps in the validation through Computer-Aided Engineering (CAE) in the designing stage using CAD software, ensuring the quality of the repair. Furthermore, the redesigned development has been carried out in the best way to obtain a better cooling, robustness, or plastic flow. In this research is implemented the proposed methodology in a Hot Runner System. Furthermore, a numerical simulation for three cases to evaluate the heat transfer and cooling times performed, finding the main differences in heat transfer due to drilled or milled rectangular channels, minimizing the time to reach ejection temperature and mold/part temperatures.

Procedia Engineering, 2010

This work deals with rotating bending fatigue tests on aluminum alloy 6061-T6, under loading cond... more This work deals with rotating bending fatigue tests on aluminum alloy 6061-T6, under loading condition close to elastic limit of material. Results have been obtained for three types of specimens: without artificial pitting, specimens with one artificial pitting hole and specimens with two close artificial pitting holes. Results show that fatigue endurance is reduced in the case of one pitting hole and considerably for two close pitting holes. In order to explain this behavior, numerical analysis by FE were carried out to determine the stress concentrations for the three types of specimens. It is found that the stress concentration for two close pitting holes is an exponential function of the separation between the two holes, under uniaxial loading. The probability to find two or more close pitting holes in real industrial materials, such as cast iron, corroded or pitting metallic alloys is high; then, the stress concentration for two or more close pitting holes should be considered for the fatigue prediction life under fatigue loading and corrosion attack applications.

MRS Proceedings, 2010

This work deals with rotating bending fatigue tests on aluminum alloy 6061-T6, under loading cond... more This work deals with rotating bending fatigue tests on aluminum alloy 6061-T6, under loading condition close to the elastic limit of the material. Results have been obtained for three types of specimens: without artificial pitting, specimens with one artificial pitting hole and specimens with two neighboring artificial pitting holes. Results show that fatigue endurance is reduced in the case of one pitting hole and considerably for two neighboring pitting holes. In order to explain this behavior, numerical analysis by FE are carried out to determine the stress concentrations for the three types of specimens. It is found that the stress concentration for two neighboring pitting holes is an exponential function of the separation between the two holes, under uniaxial loading. The probability to find two or more neighboring pitting holes in real industrial materials, such as cast iron, corroded or pitting metallic alloys is high; then, the stress concentration for two or more neighborin...

Microscopy and Microanalysis, 2021

Procedia Engineering, 2010

This work deals with rotating bending fatigue tests on aluminum alloy 6061-T6, under loading cond... more This work deals with rotating bending fatigue tests on aluminum alloy 6061-T6, under loading condition close to elastic limit of material. Results have been obtained for three types of specimens: without artificial pitting, specimens with one artificial pitting hole and specimens with two close artificial pitting holes. Results show that fatigue endurance is reduced in the case of one pitting hole and considerably for two close pitting holes. In order to explain this behavior, numerical analysis by FE were carried out to determine the stress concentrations for the three types of specimens. It is found that the stress concentration for two close pitting holes is an exponential function of the separation between the two holes, under uniaxial loading. The probability to find two or more close pitting holes in real industrial materials, such as cast iron, corroded or pitting metallic alloys is high; then, the stress concentration for two or more close pitting holes should be considered for the fatigue prediction life under fatigue loading and corrosion attack applications.

Revista de Ciencias Tecnológicas, 2022

Repairs and redesigns for plastic injection molding parts generally is a short and straightforwar... more Repairs and redesigns for plastic injection molding parts generally is a short and straightforward process consisting of inspection, modeling, and evaluation. The present paper implements a methodology for redesigning and repairing injection molding parts based on the frontal process for developing concepts. The proposed methodology helps in the validation through Computer-Aided Engineering (CAE) in the designing stage using CAD software, ensuring the quality of the repair. Furthermore, the redesigned development has been carried out in the best way to obtain a better cooling, robustness, or plastic flow. In this research is implemented the proposed methodology in a Hot Runner System. Furthermore, a numerical simulation for three cases to evaluate the heat transfer and cooling times performed, finding the main differences in heat transfer due to drilled or milled rectangular channels, minimizing the time to reach ejection temperature and mold/part temperatures.

Procedia Engineering, 2010

This work deals with rotating bending fatigue tests on aluminum alloy 6061-T6, under loading cond... more This work deals with rotating bending fatigue tests on aluminum alloy 6061-T6, under loading condition close to elastic limit of material. Results have been obtained for three types of specimens: without artificial pitting, specimens with one artificial pitting hole and specimens with two close artificial pitting holes. Results show that fatigue endurance is reduced in the case of one pitting hole and considerably for two close pitting holes. In order to explain this behavior, numerical analysis by FE were carried out to determine the stress concentrations for the three types of specimens. It is found that the stress concentration for two close pitting holes is an exponential function of the separation between the two holes, under uniaxial loading. The probability to find two or more close pitting holes in real industrial materials, such as cast iron, corroded or pitting metallic alloys is high; then, the stress concentration for two or more close pitting holes should be considered for the fatigue prediction life under fatigue loading and corrosion attack applications.

MRS Proceedings, 2010

This work deals with rotating bending fatigue tests on aluminum alloy 6061-T6, under loading cond... more This work deals with rotating bending fatigue tests on aluminum alloy 6061-T6, under loading condition close to the elastic limit of the material. Results have been obtained for three types of specimens: without artificial pitting, specimens with one artificial pitting hole and specimens with two neighboring artificial pitting holes. Results show that fatigue endurance is reduced in the case of one pitting hole and considerably for two neighboring pitting holes. In order to explain this behavior, numerical analysis by FE are carried out to determine the stress concentrations for the three types of specimens. It is found that the stress concentration for two neighboring pitting holes is an exponential function of the separation between the two holes, under uniaxial loading. The probability to find two or more neighboring pitting holes in real industrial materials, such as cast iron, corroded or pitting metallic alloys is high; then, the stress concentration for two or more neighborin...

Microscopy and Microanalysis, 2021

Procedia Engineering, 2010

This work deals with rotating bending fatigue tests on aluminum alloy 6061-T6, under loading cond... more This work deals with rotating bending fatigue tests on aluminum alloy 6061-T6, under loading condition close to elastic limit of material. Results have been obtained for three types of specimens: without artificial pitting, specimens with one artificial pitting hole and specimens with two close artificial pitting holes. Results show that fatigue endurance is reduced in the case of one pitting hole and considerably for two close pitting holes. In order to explain this behavior, numerical analysis by FE were carried out to determine the stress concentrations for the three types of specimens. It is found that the stress concentration for two close pitting holes is an exponential function of the separation between the two holes, under uniaxial loading. The probability to find two or more close pitting holes in real industrial materials, such as cast iron, corroded or pitting metallic alloys is high; then, the stress concentration for two or more close pitting holes should be considered for the fatigue prediction life under fatigue loading and corrosion attack applications.