2013 International Solid Freeform Fabrication Symposium: Recent submissions
Now showing items 21-40 of 84
-
Some Investigations Regarding the Surface Treatment of Ultem*9085 Parts Manufactured with Fused Deposition Modeling
(University of Texas at Austin, 2013)Fused Deposition Modeling (FDM) parts are typically subject to process-related rough or wavy surfaces, with stair-stepping effects whenever the parts produced have sloped or rounded part geometries; however, the level ... -
The Numerical Modeling of Fatigue Properties of a Bio-compatible Dental Implant Produced by Electron Beam Melting® (EBM)
(University of Texas at Austin, 2013)Cyclic load could result in the fatigue failure of a component at stress levels below the yielding stress of material. Therefore, studying the mechanical behaviors of a dental implant structure under cyclic load is ... -
Additively Manufactured Flexible Fluidic Actuators For Precision Control in Surgical Applications
(University of Texas at Austin, 2013)Previously, the Milwaukee School of Engineering (MSOE) demonstrated a dexterous tele-operational robotic system where actuators, joints, and linkages were fabricated simultaneously using Selective Laser Sintered Nylon ... -
Ankle Foot Orthotics Optimization by Means of Composite Reinforcement of Free-Form Structures
(University of Texas at Austin, 2013)Ankle-Foot-Orthoses (AFOs) are assistive devices prescribed for a number of physical and neurological disorders affecting the mobility of the lower limbs. Traditional AFO design is based on thermoforming polymer sheets ... -
Parallel Contour Path Planning for Complicated Cavity Part Fabrication using Voronoi-based Distance Map
(University of Texas at Austin, 2013-08-16)To generate parallel contour path for direct production of complicated cavity component, a novel path planning based on Voronoi-based distance map is presented in this paper. Firstly, the grid representation of polygonal ... -
Probabilistic Simulation of Solidification Microstructure Evolution During Laser-Based Metal Deposition
(University of Texas at Austin, 2013-08-16)A predictive model, based on a Cellular Automaton (CA) - Finite Element (FE) method, has been developed to simulate microstructure evolution during metal solidification for a laser based additive manufacturing process. ... -
A Systematic Use of Reverse Engineering in Evaluating the Overall Accuracy of the Fabricated Parts
(University of Texas at Austin, 2013)In this paper a systematic approach is proposed that evaluates the overall accuracy of a part. In this approach, by using the feature taxonomy, a part is decomposed into primitive features. Then, each feature is compared ... -
Automatic Feedback Control in Electron Beam Melting Using Infrared Thermography
(University of Texas at Austin, 2013-08-16)An infrared (IR) camera has been installed in an Arcam A2 Electron Beam Melting (EBM) system for improved layer-by-layer monitoring and feedback control of the EBM build process. Previous work has demonstrated the ... -
Design of an Empirical Process Model and Algorithm for the Tungsten Inert Gas Wire+Arc Additive Manufacture of Ti-6Al-4V Components
(University of Texas at Austin, 2013)In the wire+arc additive manufacture process parameters can be varied to achieve a wide range of deposit widths, as well as layer heights. Pulsed Tungsten Inert Gas was chosen as the deposition process. A working envelope ... -
An Energy Dissipative Constitutive Model for Multi-Surface Interfaces at Weld Defect Sites in Ultrasonic Consolidation
(University of Texas at Austin, 2013)A new finite element based constitutive model has been developed for quantification of energy dissipation due to friction and plastic deformation at the mating interface of two surfaces during the Ultrasonic Consolidation ... -
Process Mapping of Transient Melt Pool Response in Wire Feed E-Beam Additive Manufacturing of Ti-6Al-4V
(University of Texas at Austin, 2013)Wire feed electron beam additive manufacturing processes are candidates for manufacturing and repair in the aerospace industry. In order to implement feedback or feedforward control approaches, the time needed for a ... -
Understanding Ti-6Al-4V Microstructure Control in Additive Manufacturing via Process Maps
(University of Texas at Austin, 2013)In direct metal additive manufacturing, the ability to predict and control as-deposited microstructure can reduce the need for post-processing and speed up the qualification process. In this work, a microstructure process ... -
Process Mapping for Qualification Across Multiple Direct Metal Additive Manufacturing Processes
(University of Texas at Austin, 2013)This paper gives an overview of work by the authors developing process mapping methods for additive manufacturing (AM), capturing the dependence of melt pool geometry and microstructure on primary processing variables ... -
Melt Pool Geometry Simulations for Powder-Based Electron Beam Additive Manufacturing
(University of Texas at Austin, 2013-08-16)It is known that the melt pool geometry and dynamics strongly affect the build part properties in metal-based additive manufacturing (AM) processes. Thus, process temperature predictions may offer useful information of ... -
Assessing New Support Minimizing Strategies for the Additive Manufacturing Technology SLM
(University of Texas at Austin, 2013-08-16)To successfully produce metal parts by SLM, additional support structures are needed to support overhanging surfaces in order to dissipate process heat and to minimize geometrical distortions induced by internal stresses. ... -
An Event-Driven Software Architecture for Process Analysis in Additive Manufacturing
(University of Texas at Austin, 2013-08-16)Additive Manufacturing is still not commonly accepted as a considerable manufacturing process for serial products. Build rate and cost estimation or even the traceability of parts concerning Quality Management issues is ... -
Lattice Boltzmann Simulations of Multiple Droplet Interactions During Impingement on the Substrate
(University of Texas at Austin, 2013)Studying material interface evolution in the course of multiple droplet interactions is critical for understanding the material additive process in inkjet deposition. In this paper, we have developed a novel numerical ... -
An Optimization Based Design Framework for Multi-Functional 3D Printing
(University of Texas at Austin, 2013-08-16)This work investigates design analysis and optimization methods for the integration of active internal systems into a component for manufacture using multi-material 3D printing processes. This enables efficient design ... -
Numerical Analysis of Thermal Stress and Deformation in Multi-Layer Laser Metal Deposition Processes
(University of Texas at Austin, 2013-08-16)Direct metal deposition (DMD) has gained increasing attention in the area of rapid manufacturing and repairing. This process involves extremely high thermal gradients and heat and cooling rate, resulting in residual ... -
Reverse Engineering of Materials Using Surfacelet-Based Methods for CAD-Material Integration
(University of Texas at Austin, 2013)To integrate material information into CAD systems, geometric features of material microstructure must be recognized and represented, which is the focus of this paper. Linear microstructure features, such as fibers or ...
