Limitations of the inherent strain method in simulating powder bed fusion processes
By Matteo Bugatti, Q. Semeraro. Additive Manufacturing, 2018
142 citations recorded by the source corpus.
Abstract Process optimization has always been a crucial step for effective usage of metal additive manufacturing (AM) processes: it consists in establishing quantitative relations between final part's characteristics and process parameters to find their optimal combination and obtain a fully functional mechanical component. Experimental investigation techniques are usually employed for this purpose but they can be extremely expensive and time-consuming, especially when the output of the process depends on a large number of parameters, like for AM. Numerical simulation could represent an alternative solution: by reproducing the real process characteristics, a simulation could provide useful insights, allowing to evaluate the performance of the process for different parameter combinations without relying exclusively on expensive experimental campaigns. In this work, a finite element AM simulation based on the inherent strain (IS) method was developed and the prediction performance in terms of part's residual deformation was evaluated by comparing the numerical results with the measurements carried out on an experimental campaign. A new model calibration approach for prediction improvement was also implemented and it allowed to discover an unexpected behaviour of the model that strongly affects the validity of this method for AM simulation.
Subfields: Automotive Engineering, Mechanical Engineering
View Paper: https://www.semanticscholar.org/paper/7cdbce601a2fbe90d828c3cac2237887eab066dd
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Automotive Engineering
In Mechanical Engineering
Citations in the corpus
- Evaluation of a thermomechanical model for prediction of residual stress during laser powder bed fusion of Ti-6Al-4V (2019, background): “limitations of the traditional inherent strain method [5] likely result from its inability to account for heating 45 up of the part during the build and the fact that various geometries, such as thin walls or overhangs, will experience a different thermal history and thus have different plastic stra”