PNNL-13501 - Pacific Northwest National Laboratory

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(a) (b) (c) (d) Figure 1. Results of Test Problem 1. First Stage of two-stage stretch-forming using an spherical punch and cylindrical die. (a) Initial flat sheet, (b) Equivalent stress, punch displaced 15 mm, (c) Equivalent stress, punch retracted to 13 mm, and (d) Equivalent plastic strain after punch is retracted. MARC Input CDF-to-MARC Input Translator Legend MARC MARC Input Translation Simulation MARC PLDUMP t19 User Routine Output MARC Proprietary File Format Common Data Format stress/ strain geometry data Enhanced MARC-to-CDF Translator MARC PLDUMP t19 User Routine Output stress/ strain CDF geometry data Enhanced MARC-to-CDF Translator Figure 2. Processing and translation steps and intermediate files produced in Test Problem 1 CDF Design and Manufacturing Engineering 181
subsequently transform them back into the MARC input format. This capability was crucial to the subsequent example problems that incorporated remeshing and multiple analysis steps. Figure 3 shows the second stage for the stretch forming process. A continuous 2-step analysis was also performed in MARC to confirm that the results were for all purposes identical. Test Problem 2 The second problem added mesh refinement to Test Problem 1. The goal was to stop the forming analysis, refine a region of the mesh, remap the intermediate results to the new mesh, and restart the analysis. Using internally developed gridding software, NWGrid, we developed data transformation tools to convert between the common data format and NWGrid. Modifications to NWGrid were required to support shell elements with multiple layers and support the reflection of results. Figure 4 illustrates the additional data transformation routines that are required to support the remapping of model results between different meshes. Figure 5 compares the equivalent plastic strain distributions at the intermediate forming stage for the original analysis in Test Problem 1 with the refined mesh in Test Problem 2. Figure 5 also shows the significant capability in NWGrid to reflect the results to construct a full 360-degree model from the previous ¼-symmetry model. This is an important capability when the forming process is symmetric, but subsequent operations; such as welding, introduce nonsymmetric thermal or mechanical loads. Test Problem 3 The intent of the third problem was to combine and extend the capabilities developed for test problems 1 and 2 to prepare the meshes for a welding analysis shown in Figure 6. The schematic of the complete process is shown in Figure 7. The goal was to map the results of a forming simulation to a new mesh that included the necessary mesh detail to simulate joining of a beam to the hydro-formed part. Mesh refinement is also necessary in this case to capture the thermal gradients of the welding analysis. Remeshing the formed part to have coincident node spacing with the attached beam proved to be an ambitious goal, and this problem was only partially completed with the allotted funding. Figure 6 shows a final thickness plot of the hydroforming analysis and the combined meshes of the hydroforming analysis and the beam introduced for welding. However, additional work is required to generate a mesh at the intersection of these two geometries that was well defined enough to provide accurate analysis results. This work was still in progress. 182 FY 2000 <strong>Laboratory</strong> Directed Research and Development Annual Report Summary and Conclusions The software components developed under this effort now provide scientists and engineers with the ability to perform integrated multistep finite element analysis using a small collection of commercial finite element software applications. The present work to support the use of NWGrid further promises to extend this capability to provide robust remeshing/remapping capabilities. Critical technical issues have been identified and addressed, providing a robust solution to integrated modeling and simulation needs of automotive manufacturing scientists and engineers. Future development efforts should expand the collection of data transformation tools to support additional finite element application formats. Future research efforts should focus on increasing the ease with which NWGrid can be used by scientists and engineers, the incorporation of material properties into the common data format and data pedigree representations, and the development of a Web-based architecture for supporting data transformation tools (i.e., Web-based translation services). Presentations Johnson KI. September 2000. “Integrated Modeling and Simulation, Joining of Hydroformed Structures, Glass Process Modeling.” Presented to Reza Sadeghi and John Long, MSC Software Corporation. Thurman DA. February 2000. Collaborative Problem Solving Environments: What Use Are They? Policy and Management Science Technical Network, Battelle Seattle Research Center. Thurman DA and T Peterson. March 2000. Information Technology to Support Public Involvement Processes. Puget Sound Chapter of the American Urban Planning Association. Thurman DA. April 2000. Collaborative Problem Solving Environments for Wastewater Management. Modeling and Assessment Unit, Water Treatment Group, Department of Natural Resources, King County, Washington. Thurman DA. June 2000. Collaborative Environments and Virtual Facilities. Members of the Battelle/<strong>PNNL</strong> Mexican Alliance.
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Laboratory Directed Research and De
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Laboratory Directed Research and De
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Computational Science and Engineeri
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Policy and Management Sciences Asse
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Introduction Department of Energy O
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5. After reviews by the Technical a
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• The Technical Council peer revi
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methods applicable to combustion, s
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Summary Each national laboratory mu
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Study Control Number: PN0004/1411 A
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Table 1. Positive and negative ions
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m/z Arbitrary Units Figure 1. Mass
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introduce low-volatility compounds
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arrangement, but the charge is reta
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two liquid chromatographic gradient
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Integrated Microfabricated Devices
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Matrix Assisted Laser Desorption/Io
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Molecular Beam Synthesis and Charac
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temperature distribution of the des
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expected to result in significant a
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Study Control Number: PN99069/1397
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Seuss DT and KA Prather. 1999. “M
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Analysis of Receptor-Modulated Ion
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laboratory (Lu and Xie 1997; Lu et
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Automated DNA Fingerprinting Microa
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Comparison of 4 Xanthomonas Isolate
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Approach Hematopoietic (bone marrow
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Anti-Human lgG Human lgG Protein G
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Characterization of Global Gene Reg
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PCR products for immobilization on
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identify novel proteins of importan
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Immunoprecipitaton of tyrosinephosp
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Coupled NMR and Confocal Microscopy
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In the optical microscopy image, th
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Development and Applications of a M
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Figure 3. Hepa-1 cells undergoing a
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cellular processing (such as post-t
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8. Initial demonstration of an off-
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expression systems for several year
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accumulation of protein products, i
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Fungal Conversion of Agricultural W
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Fungal Conversion of Waste Glucose/
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Summary and Conclusions We demonstr
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are shown in Figure 1(a) and 1(b),
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Anchorage-Independent Growth (% con
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selection of seedlings demonstratin
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NMR-Based Structural Genomics Micha
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Solution-State Structure and Fold-C
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Plant Root Exudates and Microbial G
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Summary and Conclusions • The gre
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Jones-Oliveira JB, JS Oliveira, HE
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• securely moves files to a targe
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Plenary invited lecture, “The Ele
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Figure 1. X3DGEN tetrahedral mesh o
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Figure 5a. OSO volume rendering of
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Development of Models of Cell-Signa
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SOS p 23 EGFR Professor Rodland at
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Oliveira JS, JB Jones-Oliveira, and
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Figure 2. Associating a dataset mar
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to 1) incorporate three-dimensional
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Page 152 and 153: Mixed Hamiltonian Methods for Geoch
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phenanthrene resistant fraction con
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injection of an immiscible gas phas
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still some key kinetic issues that
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Application of a Crop Model The res
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The Nature, Occurrence, and Origin
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Particle number concentration, 1/cm
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geometry optimized AlOOH and FeOOH
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allowable parameters using thermody
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TCE + 3H + + 3Fe 2+ Fe)=> acetylene
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Use of Shear-Thinning Fluids for In
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concentration of 0.5% AMX was the m
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Roberts AL, LA Totten, WA Arnold, D
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tetra-scale computing, envisioned a
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Energy Technology and Management
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Figure 2. Setup for the second expe
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phase. The algorithms will be teste
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[Pb-212]/[Pb-212] final 100 10 1 0.
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Plasma Particle Dielectric Fiber El
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(species, sub-species, and sex), sp
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Figure 3. Relative risk of bone and
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Development of a Preliminary Physio
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Development of a Virtual Respirator
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Figure 3. Use of the chest cavity a
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Examination of the Use of Diazolumi
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Indoor Air Pathways to Nuclear, Che
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Source Building Release Observed re
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To illustrate the potential impact
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Non-Invasive Biological Monitoring
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Materials Science and Technology
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Figure 1. (a) - (c) Successive magn
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Component Fabrication and Assembly
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Development of a Low-Cost Photoelec
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elaxations, indicating the adequacy
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Promising chemical durability, as m
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Study Control Number : PN98028/1274
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High Power Density Solid Oxide Fuel
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Hybrid Plasma Process for Vacuum De
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Matson DW, PM Martin, WD Bennett, J
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We showed the proof-of-principle ap
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Bandgap Energy (eV) 2.9 2.85 2.8 2.
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Ultrathin Electrolyte Test Results
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Detailed Investigations on Hydrogen
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identified low energy step structur
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Development of Novel Photo-Catalyst
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-2 -1 Energy (eV) 0 1 2 Cu2O SrTiO3
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Here, we perform adsorption and des
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exceed those in the all-metal devic
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Intensity (a.u.) 0 100 200 300 400
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integrated voltage (V) 0.10 0.08 0.
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The first step was to implement thi
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Spontaneous Formation of Cu2O Nano-
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Actinide Chemistry at the Aqueous-M
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Figure 5. Close-up atomic force mic
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to 300°C and 400°C. Unfortunately
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Summary and Conclusions Transmutati
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Advanced Calibration/Registration T
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Figure 1a. Violet filter Figure 1b.
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Autonomous Ultrasonic Probe for Pro
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containing nitrous oxide, an optica
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Chemical Detection Using Cavity Enh
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Figure 3 is a color rendered simula
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appropriate study has been performe
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Exploitation of Conventional Chemic
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Figures 3 and 4 illustrate the impa
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enefits of using a modified spread-
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Single Channel Signal 0.0025 0.0020
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Therefore, in order to extract the
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A next-generation technology is nee
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Wind Dir. Figure 2. Negative ion co
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Volumetric Imaging of Materials by
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amplitude and peak frequency change
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Figure 3. 13 C NMR spectrum of corn
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Approach Two flow loops, one that o
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Modification of Ion Exchange Resins
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Permanganate Treatment for the Deco
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minimized by medium exchange. After
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Figure 1. Thermogravimetric analysi
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Validation and Scale-Up of Monosacc
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Concentration (g/100g solution) Con
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Analysis of High-Volume, Hyper-Dime
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ecent figure of merit values. Shoul
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Probabilistic Methods Development f
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a) Traditional PCA-based process co
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Acronyms and Abbreviations 2-D two-
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