Technical papers

Powder Bed Process Modelling & Validation
N. N’Dri, H.-W. Mindt, B. Shula, M. Megahed, A. Peralta, P. Kantzos and J. Neumann, DMLS Process Modelling & Validation, TMS 2015 144th Annual Meeting & Exhibition, March 15-19, 2015, Orlando, FL.…
Virtual Performance
Metal additive-manufacturing process and residual stress modeling
M. Megahed, H.-W. Mindt, N. N’Dri, H.-Z. Duan and O. Desmaison, Metal Additive Manufacturing Process and Residual Stress Modelling, Integrating Materials and Manufacturing Innovation, 2016, 5:4. DOI: 10.1186/s40192-…
Virtual Performance Metal additive manufacturing, Powder bed, Blown powder, Wire feed, Process modeling, As-built porosity, Residual stress, Distortion, Multi-scale modeling, Multi-physics modeling, ICME
A Coupled Approach To Weld Pool, Phase And Residual Stress Modelling Of Laser Direct Metal Deposition (LDMD) Processes
M. Vogel, M. Khan, J. Ibara-Medina, A. Pinkerton, N. N’Dri and M. Megahed, A Coupled Approach to Weld Pool, Phase and Residual Stress Modelling of Laser Direct Metal Deposition (LDMD) Processes, 2nd World Congress…
Virtual Performance Laser Cladding, melt pool modeling, CFD/FEM coupling
Optimization study on a car crash model of 20 million finite elements
From March 2013 to March 2014 Renault and ESI France worked on the FMOC project (Fast Multi-physics Optimization of a Car) on the PRACE facilities. The focus is on the frontal car crash. The car crash model is growing…
Virtual Performance Finite Element, Optimization
Microporosity Prediction and Validation for Ni-based Superalloy Castings
Microporosity in high performance aerospace castings can reduce mechanical properties and consequently degrade both component life and durability. Therefore, casting engineers must be able to both predict and reduce…
Casting
Part Ejection in Magnesium High Pressure Die Casting
One important process step in Magnesium HPDC (High Pressure Die Casting) is the ejection of part from the mold. Due to solidification and cooling down the part shrinks onto the mold. To overcome the strong forces that…
Casting
Grain Structure Prediction
The control of grain structure, which develops during solidification processes in investment casting of nozzle guide vanes (NGVs), is a key issue for optimization of their mechanical properties. The main objective of…
Casting Ni-based superalloys, investment casting, nozzle guide vanes, modelling, cellular automata - finite element (CAFE) module, grain structure
Thermal calibration and porosity prediction
Investment casting is the only commercially used technique for fabrication of nozzle guide vanes (NGVs), which are one of the most important structural parts of gas turbines. Manufacturing of NGVs has always been a…
Casting Ni-based superalloys, investment casting, nozzle guide vanes, thermal model, thermal history, porosity
Conversion of a Vacuum-Assist Casting to a Conventionally Vented Casting with Casting Simulation
In the current competitive environment, the capability to produce high quality die casting components whilst reducing production cost and development times is a challenge the foundry industry must face up to. Whether it…
Casting
Numerical simulation and experimental validation of guided ditching tests
The oblique water entry of structures with high horizontal speed is investigated in this work. First, the necessity of aircraft ditching analysis as well as the requirements for numerical tools to simulate aircraft…
Virtual Performance Guided Ditching, Fluid-structure interaction, High speed water impact, Experimental methods, Computational modeling, Smoothed Particle Hydrodynamics