Single point incremental forming of PVC: Experimental findings and theoretical interpretation

Silva, M.B.; Alves, L.M.; Martins, P.A.F.

doi:10.1016/j.euromechsol.2010.03.008

Cited by 58 publications

(59 citation statements)

References 19 publications

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“…In general, sheet metal forming is characterized by complex strain paths that prevent the distribution of stresses and the critical values of damage at the onset of necking to be directly determined from the experimental values of strain. However, in case of conical and pyramidal SPIF parts made from PVC, previous work in the field combined with results obtained in the present investigation showed that strain paths are linear and do not experience abrupt changes in direction at the forming limit curve (FLC) [7]. The aforementioned observation opens the possibility of utilizing SPIF tests based on conical and pyramidal geometries to set up a new methodology for determining the stress distribution and the critical values of damage from the experimental strains at the onset of cracking.…”

Section: Determination Of Strains Stresses and Ductile Damagementioning

confidence: 67%

“…However, both developments exhibited difficulties in modelling the SPIF of polymers. For example, the theoretical framework proposed by Silva et al [7] could only be qualitatively assessed against experimental data and observations. On the other hand,…”

mentioning

confidence: 99%

“…The discussion on the relative performance of the SPIF of polymers against that of metals performed by Silva et al [6] may also be included in the first line approach ( Table 2). The works of Silva et al [7] and Alkas Yonan and coworkers [8,9] were built upon the second line approach. Silva et al [7] developed a theoretical framework based on membrane analysis and pressure-sensitive yield surfaces to characterize plastic flow and failure in polymer sheets.…”

mentioning

confidence: 99%

“…The works of Silva et al [7] and Alkas Yonan and coworkers [8,9] were built upon the second line approach. Silva et al [7] developed a theoretical framework based on membrane analysis and pressure-sensitive yield surfaces to characterize plastic flow and failure in polymer sheets. Alkas Yonan and coworkers [8,9] developed a non-linear viscoplastic material model for thermoplastics and its finite strain extension to the finite element simulation of PVC parts produced by SPIF.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Plastic flow and failure in single point incremental forming of PVC sheets

Yonan¹,

Silva²,

Martins³

et al. 2014

Express Polym. Lett.

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Section: Determination Of Strains Stresses and Ductile Damagementioning

confidence: 67%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Plastic flow and failure in single point incremental forming of PVC sheets

Yonan¹,

Silva²,

Martins³

et al. 2014

Express Polym. Lett.

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“…Na pesquisa de MARTINS et al [1], foi constatado que cada material apresenta um tipo de falha característica que induziu a um limite que cada material pode ser conformado. Posteriormente outros dois trabalhos foram publicados sobre o mesmo assunto por FRANZEN et al [2] e SILVA et al [3], porém o material de análise foi o PVC. Nesses trabalhos, o interesse foi aprofundar as análises sobre as possibilidades do uso de EI de PVC para produção de pequenos lotes de produtos com esse material.…”

Section: Introductionunclassified

Estudo dos parâmetros de estampagem incremental para PVC

Pradella¹,

Folle²

2016

Matéria (Rio J.)

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RESUMONa Engenharia de Fabricação, existem diversas áreas de conhecimento voltadas ao estudo dos processos de fabricação que dão origem aos produtos fornecidos para as indústrias de transformação e produtos destinados aos consumidores finais que podem ser processados a partir de chapas, fios, barras e perfis. Em ambos os casos, um dos processos de fabricação mais usado é a "Conformação Mecânica" que é o processo mecânico onde se obtém peças através da compressão de metais sólidos em moldes, utilizando a deformação plástica da matéria-prima para o preenchimento das cavidades dos moldes. No entanto, existe um processo que pode fazer isso sem a necessidade de moldes, a chamada 'Estampagem Incremental' que consiste em desenhar o formato da peça em uma fresadora CNC através de um punção cilíndrico com ponta arredondada. O objetivo do presente artigo é fazer um estudo sobre o processo de Estampagem Incremental de polímeros como sendo um novo tipo de tecnologia de Prototipagem Rápida que é baseada no processo de conformação de material, diferente dos processos já existentes de remoção ou adição de material. Os testes foram feitos em uma geometria em formato de tronco de pirâmide, em três estágios subsequentes e o objetivo é avaliar alguns parâme-tros como a temperatura de trabalho e o diâmetro do punção no resultado final do protótipo. O material escolhido para o estudo foi o PVC pois esse está presente em muitos estudos já feitos sobre o assunto. Testes prá-ticos com PVC indicaram que uma variação na temperatura de trabalho do material de 20°C resultou em um aumento significativo nos resultados de deformação quando feito os testes. Palavras-chave:Prototipagem Rápida, Estampagem Incremental de Polímeros, PVC, Tecnologia aplicada ao Design. ABSTRACTIn Manufacturing Engineering, there are several areas of knowledge focused on the study of manufacturing processes that give rise to products supplied to the processing industries and products to final consumers that can be processed from sheet, wires, rods and beams. In both cases, one of the most widely used manufacturing processes is the "Metal Forming" which is the mechanical process that pieces can be obtained by compression of solid metal in molds using plastic deformation of the material for filling the molds cavities. However, there is a process that can do the same without the need for molds, the so-called incremental sheet forming which consists of drawing the workpiece on a CNC form milling using a small cylindrical punch with a rounded tip. The purpose of this work is to make a study of the process of incremental sheet forming of polymers as a new type of rapid prototyping technology that is based on the process of forming material, different from the existing processes for removing or adding material. The tests were done in a geometry pyramid trunk format, in three subsequent stages and the objective is to evaluate some parameters such as temperature of working and the punch diameter in the final result of the prototype. The material chosen for the study was the ...

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Energy Reduction in Manufacturing via Incremental Forming and Surface Microtexturing

Cao

Malhotra

2018

Energy Efficient Manufacturing

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Single point incremental forming of PVC: Experimental findings and theoretical interpretation

Cited by 58 publications

References 19 publications

Plastic flow and failure in single point incremental forming of PVC sheets

Plastic flow and failure in single point incremental forming of PVC sheets

Estudo dos parâmetros de estampagem incremental para PVC

Energy Reduction in Manufacturing via Incremental Forming and Surface Microtexturing

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