Efficient experimental methods for rapid fatigue life estimation of additive manufactured elements

Colombo, Chiara; Tridello, Andrea; Pagnoncelli, Ana Paula; Biffi, Carlo Alberto; Fiocchi, Jacopo; Tuissi, A.; Vergani, L.; Paolino, Davide Salvatore

doi:10.1016/j.ijfatigue.2022.107345

Cited by 12 publications

(6 citation statements)

References 53 publications

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“…Indeed, according to Figure 7A,C, there is not a clear correlation between the defect sphericity and the defect volume or the equivalent diameter. On the other hand, the defect sphericity decreases with the defect surface, in agreement with literature results 46 . Therefore, depending on the considered parameters, the defect trend can vary and may affect the results of damage‐tolerant FE simulation, as investigated in Section 4.…”

Section: Defect Analysissupporting

confidence: 88%

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Absorbing capabilities of additively manufactured lattice structure specimens for crash applications: Damage tolerant design and simulations

Tridello,

Boursier Niutta,

Benelli

et al. 2024

Fatigue Fract Eng Mat Struct

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In the present work, the influence of defects on the compressive response of octet‐truss AlSi10Mg lattice structure specimens produced with a selective laser melting process is investigated. The defect population in one cell, in two cells, and cubic specimens composed of 27 cells has been assessed with micro‐computed tomography (micro‐CT) analyses. The statistical distributions of the characteristic defect sizes, i.e., the equivalent diameter, the volume, and the surface, assessed in the lattice structure specimens and in volumes randomly extracted from a rectangular bar have been compared. Finally, the compressive behavior of lattice structure specimens has been simulated with a simplified damage‐tolerant finite element model accounting for the influence of defects and compared with experimental results. The analyses have proven that the defect population in volumes extracted from a rectangular bar can provide reliable simulated results, even if micro‐CT inspections of a unit cell or specimens made of several cells are suggested.

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Section: Defect Analysissupporting

confidence: 88%

“…On the other hand, the defect sphericity decreases with the defect surface, in agreement with literature results. 46 Therefore, depending on the considered parameters, the defect trend can vary and may affect the results of damage-tolerant FE simulation, as investigated in Section 4.…”

Section: Statistical Analysis Of the Defect Populationmentioning

confidence: 99%

Absorbing capabilities of additively manufactured lattice structure specimens for crash applications: Damage tolerant design and simulations

Tridello,

Boursier Niutta,

Benelli

et al. 2024

Fatigue Fract Eng Mat Struct

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“…This type of research is experimental research, so it can be interpreted that experimental research has a treatment given to the sample in the study (Colombo et al, 2023). The experimental method is used to be able to see whether or not there is an effect of the treatment given to taekwondo athletes through chagi training (Chang et al, 2023).…”

Section: Methodsmentioning

confidence: 99%

The Effect of Chagi Training on Improving the Balance of Taekwondo Athletes

Firdausi,

Tomoliyus,

Tirtawirya

et al. 2023

IJMRA

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This study aims to determine the effect of chagi training on improving the balance of taekwondo athletes. The benefits of this research; 1) theoretically this research opens a paradigm in the field of coaching in general and especially in the taekwondo martial arts to always use a variety of exercises; 2) this research is expected to increase knowledge to trainers so that they choose training methods that are simple but can improve the physical condition of taekwondo athletes; 3) as a reference value for the quality of further research. This study used an experimental method with a one group pretest-postest research design. This research was held at Gedung Serbaguma, Wirokerten Village, Banguntapan, Bantul, Yogyakarta Special Region. This research was conducted for 4 weeks or 1 month, the research began on 03 October 2022 to 04 November 2022. The population in this study were 15 Bantul taekwondo athletes. The sample in this study were 15 Bantul taekwondo athletes, with total sampling. Data collection techniques are carried out measuring balance with a strok stand measuring instrument. The data analysis technique used is using SPSS 23 software to test the Paired sample Test. The results showed that there was an increase in chagi training on improving the balance of taekwondo athletes with a value of 0.00 < 0.05.

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“…The population of defects can be also measured through micro-CT inspections, which provide reliable information on the defect population, but do not allow an assessment of the most critical defect in the inspected specimen or part. In this case, the largest defect can be considered the most critical, even if, according to [22], the largest defect may not necessarily be the killer defect.…”

Section: Defects In Am Componentsmentioning

confidence: 99%

Assessment of the Critical Defect in Additive Manufacturing Components through Machine Learning Algorithms

et al. 2023

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The design against fatigue failures of Additively Manufactured (AM) components is a fundamental research topic for industries and universities. The fatigue response of AM parts is driven by manufacturing defects, which contribute to the experimental scatter and are strongly dependent on the process parameters, making the design process rather complex. The most effective design procedure would involve the assessment of the defect population and the defect size distribution directly from the process parameters. However, the number of process parameters is wide and the assessment of a direct relationship between them and the defect population would require an unfeasible number of expensive experimental tests. These multivariate problems can be effectively managed by Machine Learning (ML) algorithms. In this paper, two ML algorithms for assessing the most critical defect in parts produced by means of the Selective Laser Melting (SLM) process are developed. The probability of a defect with a specific size and the location and scale parameters of the statistical distribution of the defect size, assumed to follow a Largest Extreme Value Distribution, are estimated directly from the SLM process parameters. Both approaches have been validated using literature data obtained by testing the AlSi10Mg and the Ti6Al4V alloy, proving their effectiveness and predicting capability.

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Efficient experimental methods for rapid fatigue life estimation of additive manufactured elements

Cited by 12 publications

References 53 publications

Absorbing capabilities of additively manufactured lattice structure specimens for crash applications: Damage tolerant design and simulations

Absorbing capabilities of additively manufactured lattice structure specimens for crash applications: Damage tolerant design and simulations

The Effect of Chagi Training on Improving the Balance of Taekwondo Athletes

Assessment of the Critical Defect in Additive Manufacturing Components through Machine Learning Algorithms

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