Data-driven evaluation of fatigue performance of additive manufactured parts using miniature specimens

Wan, H.Y.; Chen, G.F.; Li, C.P.; Qi, X.B.; Zhang, Guangping

doi:10.1016/j.jmst.2018.12.011

Cited by 65 publications

(20 citation statements)

References 57 publications

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“…In their work, the morphology and size of β-grains and martensite simulated by the model agreed well with experimental results. Artificial neutral network (ANN) models have also been utilised to optimise AM process parameters and predict the mechanical behaviour of 3D-printed parts [ 25 , 26 ]. These types of models depend on huge amounts of experimental data for model-training purposes, and constitutive mathematical expressions describing the material properties are not required.…”

Section: Introductionmentioning

confidence: 99%

Development of VUMAT and VUHARD Subroutines for Simulating the Dynamic Mechanical Properties of Additively Manufactured Parts

2022

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Numerical modelling and simulation can be useful tools in qualification of additive manufactured parts for use in demanding structural applications. The use of these tools in predicting the mechanical properties and field performance of additive manufactured parts can be of great advantage. Modelling and simulation of non-linear material behaviour requires development and implementation of constitutive models in finite element analysis software. This paper documents the implementation and verification process of a microstructure-variable based model for DMLS Ti6Al4V (ELI) in two separate ABAQUS/Explicit subroutines, VUMAT and VUHARD, available for defining the yield surface and plastic deformation of materials. The verification process of the implemented subroutines was conducted for single and multiple element tests with varying prescribed loading conditions. The simulation results obtained were then compared with the analytical solutions at the same conditions of strain rates and temperatures. This comparison showed that both developed subroutines were accurate in predicting the flow stress of various forms of DMLS Ti6Al4V (ELI) under different conditions of strain rates and temperatures.

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Section: Introductionmentioning

confidence: 99%

Development of VUMAT and VUHARD Subroutines for Simulating the Dynamic Mechanical Properties of Additively Manufactured Parts

2022

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“…Moreover, more metallographic investigations are needed to identify the failure mechanism because the MTP fatigue test at high temperature is prone to have oxidation damage, leading to premature fatigue crack initiation and the reduction of fatigue life. Although the possible trend for the size effect has been introduced in the work, 65,66 available data are still rather scare, especially for the size effect at high temperature. More investigations should be carried out in this scope as well in the future.…”

Section: Cyclic Softening and Fatigue Lifementioning

confidence: 99%

A miniaturized thin‐plate low cycle fatigue test method at elevated temperature

Maskill

Zhou

et al. 2022

Fatigue Fract Eng Mat Struct

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This study aims to develop a high-temperature low cycle fatigue test method using a nonstandard miniature thin-plate specimen in order to characterize the cyclic viscoplasticity behavior of a component material. For demonstration, fully reversed strain-range controlled low cycle fatigue and creep-fatigue tests at 600 C have been performed for a martensitic steel using standard-sized fullscale specimens and miniaturized thin-plate specimens, respectively. Because the displacement is not directly measured from the uniform gauge section of the miniaturized specimen, a geometry-dependent scaling factor is obtained and used to convert the uniaxial strain. The results obtained are shown that the miniaturized test method developed in this work has exhibited a clear possibility to produce comparable low cycle fatigue data with those that are normally obtained by conventional standard specimen tests.

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“…Small specimens demonstrate higher fatigue strength compared to standard specimens while real parts exhibit even lower strength than the standard ones. While extended studies have been carried out to compare and evaluate the size effects on fatigue tests [54][55][56][57][58][59][60][61][62][63][64][65][66][67][68], recent studies show the implementation of miniature specimens to be instrumental in characterizing local properties of AM materials [41][42][43].…”

Section: Specimen Design and Preparationmentioning

confidence: 99%

“…Dzugan et al [42] demonstrated the implementation of miniaturized tensile test specimens instead of standard specimens in determining the local properties characterization of AM material Ti-6Al-4V. Wan et al [43] addressed the reasons, necessities, and potential strategies to evaluate and qualify the fatigue performance of AM material using miniature specimens.…”

Section: Introductionmentioning

confidence: 99%

High Cycle Fatigue Performance of LPBF 304L Stainless Steel at Nominal and Optimized Parameters

et al. 2020

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In additive manufacturing, the variation of the fabrication process parameters influences the mechanical properties of a material such as tensile strength, impact toughness, hardness, fatigue strength, and so forth, but fatigue testing of metals fabricated with all different sets of process parameters is a very expensive and time-consuming process. Therefore, the nominal process parameters by means of minimum energy input were first identified for a dense part and then the optimized process parameters were determined based on the tensile and impact toughness test results obtained for 304L stainless steel deposited in laser powder bed fusion (LPBF) process. Later, the high cycle fatigue performance was investigated for the material built with these two sets of parameters at horizontal, vertical, and inclined orientation. In this paper, displacement controlled fully reversed (R = −1) bending type fatigue tests at different levels of displacement amplitude were performed on Krouse type miniature specimens. The test results were compared and analyzed by applying the control signal monitoring (CSM) method. The analysis shows that specimen built-in horizontal direction for optimized parameters demonstrates the highest fatigue strength while the vertical specimen built with nominal parameters exhibits the lowest strength.

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Data-driven evaluation of fatigue performance of additive manufactured parts using miniature specimens

Cited by 65 publications

References 57 publications

Development of VUMAT and VUHARD Subroutines for Simulating the Dynamic Mechanical Properties of Additively Manufactured Parts

Development of VUMAT and VUHARD Subroutines for Simulating the Dynamic Mechanical Properties of Additively Manufactured Parts

A miniaturized thin‐plate low cycle fatigue test method at elevated temperature

High Cycle Fatigue Performance of LPBF 304L Stainless Steel at Nominal and Optimized Parameters

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