A novel numerical framework for simulation of multiscale spatio-temporally non-linear systems in additive manufacturing processes.

Patil, Nachiket

doi:10.18297/etd/1099

Cited by 3 publications

(6 citation statements)

References 72 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An iterative approach to meet this challenge before the manufacturing stage by pre-warping the geometry based on simulation results is described in [5]. In recent time, further simulation models have been increasingly developed to predict residual stresses and distortions of additively manufactured parts [6,7,8,9,10]. This paper presents the validation results of the simulation model described in [5,11].…”

Section: Introductionmentioning

confidence: 99%

Validation of Modelling Assumptions for the Buildup Simulation of Laser Beam Melting on the Basis of the Residual Stress Distribution

Bayerlein¹,

Zeller²,

Wunderer³

et al. 2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

View full text Add to dashboard Cite

Abstract. The growing market for additive manufacturing processes such as laser beam melting (LBM) poses new challenges. With more difficult product requirements, the need for a deeper understanding of the resulting stress states and the underlying physical principles increases. To gain a deeper understanding of the residual stress states of LBM-manufactured parts, simulations of the build-up process were carried out and validated by means of neutron diffraction (ND), X-ray diffraction (XRD) as well as incremental hole-drilling (IHD). The gathered data is also intended to serve as a validation case for other simulation models and tools. 469Bayerlein et al.

show abstract

Section: Introductionmentioning

confidence: 99%

Validation of Modelling Assumptions for the Buildup Simulation of Laser Beam Melting on the Basis of the Residual Stress Distribution

Bayerlein¹,

Zeller²,

Wunderer³

et al. 2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

View full text Add to dashboard Cite

show abstract

“…A thermo-mechanical simulation tool for SLM developed at the University of Louisville is being commercialized by 3DSIM, LLC. It is able to simulate the temperature and thermal stress distribution in the SLM process in a fine-scale [4]. The model utilizes a spatiotemporal adaptive meshing technique where the fine mesh domain moves along with the laser scan path.…”

Section: Problem Statementmentioning

confidence: 99%

“…The thermal stress is mapped to the cellular support structure using iso-parametric interpolation, and the 1 st order shape function is applied [4].…”

Section: Thermal Stress Mapping To Support Structuresmentioning

confidence: 99%

“…o For non-uniform support structures using an arithmetic sequence, the suggested threshold value for all parameters are a1 (0.8mm) and n (4) for successfully building a part.…”

Section:  For the Part With Dimensions Of 20x20x2mmmentioning

confidence: 99%

“…is the cross-section of a part using block supports. Process parameters such as laser power, speed and scan pattern are set up in the machine in step 4. The scan pattern shown in Figure 3 is a typical type for an EOS M270 machine.…”

Section: Introduction and Research Motivationmentioning

confidence: 99%

See 2 more Smart Citations

Optimization of support structures for selective laser melting.

Zeng¹

View full text Add to dashboard Cite

Empirical methodology to determine inherent strains in additive manufacturing

Setien

Chiumenti

Veen

et al. 2019

Computers & Mathematics with Applications

135

View full text Add to dashboard Cite

Part distortion is a critical issue during Additive Manufacturing (AM) of metallic parts since it prevents this technology from being implemented at industrial level. To this regard, distortion prediction even from design stage has become crucial. Actually, numerical modelling methodologies play an important role here. Different modelling approaches have been developed but one of the most computationally efficient methodology to predict distortion is the so called inherent strain method. In this work an empirical methodology to determine inherent strains is presented. This is the input data in simplified Finite Element (FE) models in order to predict distortion and residual stress fields. These inherent strains are calculated considering layer lumping strategies that might be adopted in the numerical model as well. The procedure has been developed and validated using the wellknown twin-cantilever beam structure. Ti-6Al-4V beams have been manufactured by LPBF technology following different scanning strategies. Distortion after support removal has been measured in order to be compared against numerical results. The methodology has been applied at coupon level giving accurate results and providing a preliminary validation.

show abstract

A novel numerical framework for simulation of multiscale spatio-temporally non-linear systems in additive manufacturing processes.

Cited by 3 publications

References 72 publications

Validation of Modelling Assumptions for the Buildup Simulation of Laser Beam Melting on the Basis of the Residual Stress Distribution

Validation of Modelling Assumptions for the Buildup Simulation of Laser Beam Melting on the Basis of the Residual Stress Distribution

Optimization of support structures for selective laser melting.

Empirical methodology to determine inherent strains in additive manufacturing

Contact Info

Product

Resources

About