Development and Test of an Equipment to Measure Residual Strain Inside Pipes Using the Hole-Drilling Method

Silva, Luiz Leite da; Ribeiro, Vladimir S.; Scaldaferri, Denis H. Bianchi; Rabello, Emerson Giovanni; Campos, Wagner R.C.; Mansur, Tanius Rodrigues

doi:10.1590/1679-78253126

Cited by 3 publications

(3 citation statements)

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“…Finite element simulation of fused deposition modelling process parameters were performed by varying the rod width, layer thickness, and print speed to minimize residual stresses in the printed acrylonitrile butadiene styrene. Results showed that out of the three parameters, print speed significantly contributed to the development of residual stresses, followed by the layer thickness [41]. The effect of layer deposition on the residual stress within the printed parts was also investigated.…”

Section: Influence Of Fused Deposition Modelling Process Parameters On 3d Printed Part Propertiesmentioning

confidence: 99%

Optimization of process parameters in fused deposition modelling of thermoplastics: A review

Nyiranzeyimana

Mutua

Mose

et al. 2021

Materialwissenschaft Werkst

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Among the several techniques for additive manufacturing (AM), fused deposition modelling (FDM) is widely used. Fused deposition modelling process uses a thermoplastic material, which is melted and then extruded layer by layer through a nozzle, in order to create a three‐dimensional object. As a result of the default setting of process parameters provided by the manufacturers, produced parts normally have a poor surface finish, low mechanical properties, low dimensional accuracy, and increased residual stresses compared to the parts produced using conventional manufacturing processes like molding (casting). Qualities of fused deposition modelled (FDMed) parts are generally affected by process parameters including the layer thickness, extrusion temperature, build orientation, printing speed, raster angle, infill density, raster width, nozzle diameter, and air gap. Increasing infill density, printing temperature, and decreasing print speed and layer thickness lead to increase mechanical strength and improve the surface finish of the printed parts. The optimal process parameters are preferred to achieve superior properties of the parts. This paper reviews the optimal fused deposition modelling process parameters on part qualities for making the stability of used deposition modelled parts for use. Various process parameters are identified in order to obtain desirable qualities in the manufactured parts. Areas for future research are proposed.

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Section: Influence Of Fused Deposition Modelling Process Parameters On 3d Printed Part Propertiesmentioning

confidence: 99%

Optimization of process parameters in fused deposition modelling of thermoplastics: A review

Nyiranzeyimana

Mutua

Mose

et al. 2021

Materialwissenschaft Werkst

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“…Segundo Castro e Meggiolaro [4], não é recomendado o estudo da fadiga de juntas soldadas em corpos de prova representativos, pois, as extrações resultariam no alívio das tensões residuais, que são causadas pela soldagem, as quais apresentam ordem de grandeza similar a tensões de escoamento, que, por sua vez, têm importante influência na propagação das trincas [5,6], mascarando os resultados.…”

Section: Previsões De Vida Fadiga Segundo Normas Técnicas: Uma Revisãunclassified

Previsões de Vida Fadiga Segundo Normas Técnicas: uma Revisão Crítica

Tremarin

Pravia

2017

Soldag. insp.

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Este é um artigo publicado em acesso aberto (Open Access) sob a licença Creative Commons Attribution Non-Commercial, que permite uso, distribuição e reprodução em qualquer meio, sem restrições desde que sem fins comerciais e que o trabalho original seja corretamente citado.Recebido: 27 Jun., 2017 Aceito: 03 Out., 2017 E-mails: ronaldo.tremarin@erechim. ifrs.edu.br (RCT), zacarias@upf.br (ZMCP)Resumo: O principal objetivo deste trabalho é mostrar aos especialistas envolvidos com estruturas soldadas submetidas a esforços cíclicos uniaxiais e multiaxiais, proporcionais ou não proporcionais, as opções existentes para previsão de vida em fadiga para juntas soldadas. Apresentam-se as normas, Eurocode 3 -IIW-AASHTO e BS 5400, com suas características específicas e uma revisão das metodologias computacionais desenvolvidas nos últimos anos. Para avaliar as normas apresentadas, analisa-se dois casos de previsão de vida em fadiga, uma chapa e uma viga I, nas diferentes normas. Identificou-se as similaridades e discrepâncias entre as normas, acerca dos principais parâmetros constitutivos, a previsível semelhança entre as previsões de vida em fadiga obtidas via IIW e Eurocode 3 e as significativas diferenças entres AASHTO e BS 5400 em decorrência da filosofia de cada norma. Palavras-chave:Fadiga; Solda; Prescrição de normas. Life Predictions Fatigue According to Technical Norms: a Critical ReviewAbstract: The main objective of this work is to show to the specialists involved welded structures subjected to cyclic uniaxial and multiaxial stresses proportional or non-proportional to the existing options for fatigue life prediction for welded joints that deals with the subject. Each of the standards (Eurocode 3 -IIW-AASHTO and BS 5400) has specific characteristics, some of them very distinct as well as a review of the computational methodologies developed in recent years. To evaluate the standards presented a case of fatigue life prediction of a plate top in I -beam I in the different standards. The similarities and discrepancies between the standards, the main constitutive parameters, the predicted similarity between fatigue life forecasts obtained through IIW and Eurocode 3, and the significant differences between AASHTO and BS 5400 were identified as a result of the philosophy of each standard. Key-words:Fatigue; Weld; Standards. IntroduçãoAo projetar juntas metálicas soldadas, visando à resistência à fadiga, é possível reduzir a ocorrência de falhas catastróficas e aumentar a vida útil do produto, proporcionando a produção de estruturas de aço, pontes, máquinas e outros equipamentos, com adequada segurança operacional e vida útil.O processo de soldagem implica na elevada taxa de transferência de calor, para formação das soldas e, por consequência, das conexões estruturais. Tal situação resulta na formação da Zona Afetada pelo Calor (ZAC), inserção de tensões residuais e outras alterações termo-metalúrgicas, ocorrendo a deterioração das propriedades mecânicas: ductilidade, tenacidade e outras no metal base -MB [1,2]. A relaçã...

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“…In the welded joint, the residual stress (RS) appears and remains in the absence of external loads or changes in temperature. It arises because metallic materials have different thermomechanical coefficients and elastic/plastic strain rates as a function of temperature (SILVA et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Influence of Residual Stress on Fatigue Life of Welded Joints

Tremarin

Pravia

2020

Lat. Am. j. solids struct.

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This work presents a new computational approach to estimate the fatigue life in welded joints, taking into account three-dimensional, non-proportional, and out-of-phase stresses; the thermomechanical properties of steel; parameters of the welding process; and the effects of residual stresses. We use the mechanical equations of continuous and cumulative fatigue damage found from Multiaxial RainFlow, the Wang and Brown and critical plane methods, and the Findley criteria approach. The numerical finite element method, available with software, is used to simulate the formation of residual stress and quantify its influence by solving equations. Based on the analysis of numerical results, we were able to prevision the crack location and angles of propagation of a high cycle fatigue crack with totally random loads in a metallic structure. We conclude that the result of the computational method is valid and can be used to estimate and life in fatigue in welded joints.

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Development and Test of an Equipment to Measure Residual Strain Inside Pipes Using the Hole-Drilling Method

Cited by 3 publications

References 4 publications

Optimization of process parameters in fused deposition modelling of thermoplastics: A review

Optimization of process parameters in fused deposition modelling of thermoplastics: A review

Previsões de Vida Fadiga Segundo Normas Técnicas: uma Revisão Crítica

Analysis of the Influence of Residual Stress on Fatigue Life of Welded Joints

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