etermination of the fatigue behavior of mechanical components through infrared thermograph

Autor(es)

Faria, Jose J. R. ^[1] ; Fonseca, Luiz G. A. ^[1] ; de Faria, Alfredo R. ^[1] ; Cantisano, Artur ^[1] ; Cunha, Thiago N. ^[2] ; Jahed, Hamid ^[3] ; Montesano, John ^[3]

Afiliação do(s) autor(es)

^[1] Inst Tecnol Aeronaut ITA, Dept Mech Engn, Praca Marechal Eduardo Gomes 50, BR-12228900 Sao Jose Dos Campos, SP - Brazil

^[2] Inst Tecnol Aeronaut ITA, Dept Elect & Comp Engn, Praca Marechal Eduardo Gomes 50, BR-12228900 Sao Jose Dos Campos, SP - Brazil

^[3] Univ Waterloo UW, Dept Mech & Mechatron Engn, 200 Univ Ave West, Waterloo, ON N2L 3G1 - Canada

• Tipo de documento: Artigo Científico
• Fonte: ENGINEERING FAILURE ANALYSIS; v. 134, APR 2022.
• Citações Web of Science: 0

Resumo

The determination of the fatigue behavior at a component level usually requires dedicated test rigs and an expressive amount of time. The hours spent on such machinery are expensive; therefore, solutions to reduce experimentation time are most welcomed. In this context, this investigation aims at developing a procedure for rapid determination of the fatigue strength of crankshafts by means of a thermographic methodology. The use of infrared cameras for fatigue strength analysis was first assessed in standard dog-bone specimens. Crankshafts were then tested in an in-house fatigue test rig using the conventional staircase method and the thermographic method. Sample batches with different manufacturing parameters were produced and tested to assess the robustness of the proposed alternative technique. Results of the dog-bone test campaign revealed a good correlation between fatigue strength estimates obtained with the conventional Wo center dot hler curve and the thermographic methodology. Finally, the thermographic technique also delivered results in close agreement with the staircase method for all crankshaft batches. The proposed procedure was found to be a viable, rapid alternative to conventional fatigue test programs, with potential application for complex structural components such as crankshafts, among others. (AU)

• Processo FAPESP: 19/00917-8 - Falha induzida por instabilidade em compósitos estruturais sob compressão longitudinal
• Beneficiário: Alfredo Rocha de Faria
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 18/26122-9 - Análise de defeitos internos em materiais compósitos via termografia ativa
• Beneficiário: Eduardo Torres Novais
• Modalidade de apoio: Auxílio à Pesquisa - Pesquisa Inovativa em Pequenas Empresas - PIPE