A5083360347- Additive Manufacturing and 3D Printing Technologies
- Manufacturing Process and Optimization
- Topology Optimization in Engineering
- Additive Manufacturing Materials and Processes
- Microstructure and mechanical properties
- Welding Techniques and Residual Stresses
- Advanced Multi-Objective Optimization Algorithms
- Advanced Materials and Mechanics
- Hydrogen embrittlement and corrosion behaviors in metals
- Metal and Thin Film Mechanics
- Cellular and Composite Structures
- Injection Molding Process and Properties
- Nuclear Materials and Properties
- Numerical methods in engineering
- Advanced Numerical Analysis Techniques
- Copper Interconnects and Reliability
- Titanium Alloys Microstructure and Properties
- High Temperature Alloys and Creep
- Composite Material Mechanics
- Metaheuristic Optimization Algorithms Research
- Polymer composites and self-healing
- Piezoelectric Actuators and Control
- Adhesion, Friction, and Surface Interactions
- Bone Tissue Engineering Materials
- Corrosion Behavior and Inhibition
Delft University of Technology
2015-2024
University of Cambridge
2013-2014
Eindhoven University of Technology
2012
University of Groningen
2009-2010
Additive manufacturing (AM) processes have proven to be a perfect match for topology optimization (TO), as they are able realize sophisticated geometries in unique layer-by-layer manner. From viewpoint, however, there is significant likelihood of process-related defects within complex geometrical features designed by TO. This because TO seldomly accounts process constraints and conditions typically perceived purely design tool. On the other hand, advanced AM simulations shown their potential...
Additive manufacturing technologies in general and laser powder bed fusion (L-PBF) particular have been on the rise different applications, including biomedical implants. The effects of various l-PBF process parameters microstructure properties Ti6Al4V lattice structures studied before. However, relationship between modes scanning resulting microstructure, internal imperfections, surface morphology is still underexplored. In this study, aforementioned their effect compressive mechanical...
Wire and Arc Additive Manufacturing (WAAM) emerged as a manufacturing process for large scale structures with extensive form design freedom. WAAM can be fully exploited once the relation between transient thermal history its to microstructure development resultant mechanical properties is established. This further used computational tools such Topology Optimization. paper presents model predict solid-state phase transformations in widely applicable High Strength Low Alloy steel ER110S-G. The...
Additive manufacturing enables the nearly uncompromised production of optimized topologies. However, due to overhang limitation, some designs require a large number supporting structures enable manufacturing. Because these supports are costly build and difficult remove, it is desirable find alternative that do not support. In this work, filter presented suppresses non-manufacturable regions within topology optimization loop, resulting in can be manufactured without need for supports. The...
It is attractive to combine topology optimization (TO) with additive manufacturing (AM), due the design freedom provided by AM, and increased performance that can be achieved TO. One important aspect include rules associated process restrictions of AM prevent requirement relatively large support volumes during printing. This paper presents a TO filter enforces minimum overhang angle, resulting in an optimized printable without need for structures. The based on front propagation, which, as it...
An important cause of failure in powder bed additive manufacturing is the distortion part due to thermal shrinkage during printing and relaxation residual stresses after its release from base plate.In this paper, Additive Manufacturing simulations are coupled with Topology Optimization order generate designs that not susceptible associated distortion.Two possible causes accounted for: recoater collision global product.Both considered by simulation build process defined as constraints context...
Selective laser melting (SLM) is a widely used additive manufacturing method for building metal parts in layer-by-layer manner thereby imposing almost no limitations on the geometrical layout of part. The SLM process has crucial impact microstructure, strength, surface quality and even shape part, all which depend thermal history material points within In this paper, we present computationally tractable model accounts individual scanning vectors. First, closed form solution line heat source...
Additive Manufacturing (AM) processes intended for large scale components deposit volumes of material to shorten process duration. This reduces the resolution AM process, which is typically defined by size deposition nozzle. If limitation not considered when designing Large-Scale (LSAM), difficulties can arise in manufacturing may require adaptation parameters. work incorporates nozzle constraint into Topology Optimization (TO) order generate optimized designs suitable resolution. article...
The powder bed fusion (PBF) process is a type of Additive Manufacturing (AM) technique which enables fabrication highly complex geometries with unprecedented design freedom. However, PBF still suffers from manufacturing constraints which, if overlooked, can cause various types defects in the final part. One such constraint local accumulation heat leads to surface as melt ball and dross formation. Moreover, slow cooling rates due adversely affect resulting microstructures. In this paper,...
In metal Additive Manufacturing (AM), the deposited material is subjected to a series of heating and cooling cycles. The locally occurring temperature extremes rates determine solid-state phase fractions, microstructure, texture, ultimately local properties. As shape part determines thermal history during AM, this offers an opportunity influence these properties through design. paper, we present way obtain desired by controlling history. This achieved topology optimization printed while...
Abstract A novel constraint to prevent local overheating is presented for use in topology optimization (TO). The very basis the Additive Manufacturing (AM) process physics. AM enables fabrication of highly complex topologically optimized designs. However, a major concern especially metal processes leading part failure, poor surface finish, lack dimensional precision, and inferior mechanical properties. It should therefore be taken into account at design stage. including detailed simulation...
A remarkable elastic anisotropy in plates of austenitic stainless steel produced by the Wire and Arc Additive Manufacturing process is recently reported. The Young’s modulus depends on angle orientation with respect to material deposition direction. Here, for first time, this exploited maximize structural stiffness simultaneously optimizing design layout local path direction WAAM. results obtained indicate that commonly preferred along load-path directions WAAM sub-optimal can be increased...
Abstract Although additive manufacturing (AM) allows for a large design freedom, there are some limitations that have to be taken into consideration. One of the most restricting rules is minimum allowable overhang angle. To make topology optimization suitable AM, several algorithms been published enforce In this work, layer-by-layer filter proposed by Langelaar ( Struct Multidiscip Optim 55(3):871–883, 2017), and continuous, front propagation-based, van de Ven et al. Multidiscipl...
Titanium and its alloys such as Ti6Al4V play a major role in the medical industry bone implants. Nowadays, by aid of additive manufacturing (AM), it is possible to manufacture porous complex structures which mimic human bone. However, AM parts are near net shape post processing may be needed improve their mechanical properties. For instance, samples brittle incapable withstanding dynamic loads due martensitic microstructure. The aim this study was apply two different heat treatment regimes...
Abstract Additive manufacturing (AM) and topology optimization (TO) have a synergetic relation, as AM can produce complex TO designs, provides high‐performance parts that utilize the form freedom provided by AM. Recently, has been tailored more toward with inclusion of minimum allowable overhang angle design constraint: resulting designs be built without any support structures. This work is an extension thereof, allowing structures only if they are accessible, such removed after...
The shear deformation of a composite comprising elastic particles in single crystal elastic–plastic matrix is analyzed using discrete dislocation plasticity (DDP) framework wherein motion occurs via climb-assisted glide. topology the reinforcement such that dislocations cannot continuously transverse by glide-only without encountering are impenetrable to dislocations. When glide-only, stress versus strain response strongly hardening with rate increasing decreasing particle size for fixed...