2 With this background, the creation of temperature loads is covered using simple boundary conditions or running a steady-state conduction analysis to map out an imposed temperature gradient. Piece 1- Piece 1 Title………………………………………….page 6 It will help you decide on your business about an important decision. That is, its stress/strain response is linear and when a load is removed, the structure returns to its original position in a stress/strain free condition. However, as you know, white papers are traditionally at least six pages long. JMR Consulting in Alexandria, VA, I prepared a package of content for this network appliance, after doing all the research in a one-day site visit. 1 Joint Publication 3-0 “Joint Operations,” 11 August 2011. For now, we’ll start classically and then show what this concept means in a real-world engineering situation. It starts off with a review of fracture mechanics and boils it down to a simple principle of energy in (loading) equals energy out (fracture). Engineering Comment: It’ll be obvious after this discussion that it is not logical to apply SPC’s to dependent nodes or to connect other dependent nodes between different R-elements. Let us say that we have this structure with an eigenvalue at 10Hz and it is whacked by a transient (e.g., half sinewave with frequency of 10Hz), we would expect the structure to vibrate subsequent to the hit and then gradually return to its static zero-stress condition. That is, as load is applied and the structure deforms, the stiffness matrix is reformed to account for the deformation within individual elements. ", —David Holifield, President "Everyone was completely blown away by the look and feel and polish you added. Why aren't they much stronger?". Style of Writing. Interested in viewing the online technical seminar and support files for this topic? The thermal CTE capability of the RBE2 connection will also be covered for completeness. And together, our team delivers white papers that will resonate with your prospects. The three tests are designed to be as simple as possible in order to minimize the run time of the test simulations. The client must demonstrate that their PCB component can survive GM’s vibration, PSD and Direct Transient (pothole) specifications (but that has been modified to confuse any automotive spies). Coreco Imaging (now Dalsa) in Montreal, This full-color handbook report helped a young software startup outsell many much larger competitors. In an analysis of a modern motor home, imagine the FEA model is highly idealized using beam elements for the small structural tubes, plate elements for the main longitudinal beams, and lots of mass elements to represent the engine, air conditioners, water and diesel tanks, and passengers. This article, reproduced from a three-part series in Desktop Engineering magazine, is a great introduction to the power of Finite Element Analysis to solve problems relating to vibration that often drives early product failure due to fatigue damage or just outright failure. "The white papers you wrote are clear, concise and compelling. The model has been tweaked to protect the innocent. AIM USA trade association It’s incredibly strong in compression, transparent, and also relatively light. The Discrete Element Method (DEM) is fast becoming the numerical method of choice for modelling the flow of granular material. If you’ve studied up on what a white paper actually is and white paper formats, you’re probably looking for some white paper examples to help you get the ball rolling. To effectively use bolt preload on FEA connections requires many additional steps and it converts a linear run into a nonlinear run that requires two sequential nonlinear analysis where (i) the bolt preload is applied and then (ii) the external structure load is applied. Section 2- Section 2 Title…………………………………….page 20 Director Marketing & Communications Cite additional resources and contact information. Add more white space Nevertheless, in some cases designers are too serious about white papers, so … The style should be in block format. ExactFlat in Toronto. Keeping it Simple: In finite element analysis (FEA), these natural frequencies are called eigenvalues and their shapes are noted as eigenvectors or eigenmodes. Introduction: Analysis work is rarely done because we have spare time or are just curious about the mechanical behavior of a part or system. In it, you are trying to convince your customers about the services provided by your company. Basic laminate modeling theory is introduced and then tied back to how it is implemented within Femap. ", —Normand Pigeon, President Such analyses are common in the development of rocket motors, ASME pressure vessels, electronics (PCB), electronic systems (automotive lamp systems), composite curing mandrels, generators, satellites and etc. communities. The paper will help analysts to increase the precision and validity of their discrete element modelling work. For this seminar we will use thermal-stress to cover any type of mechanical behavior, stress or deflection introduced by a fixed temperature rise (delta) or an induced temperature gradient. in Perkaskie, PA, This white paper explains a unique technology used to troubleshoot software. It was like you'd been sitting with us for a whole year, instead of just one day. Often random noise due to operating or transporting conditions can also be considered. Conclusion………………………………………………………….page 16. In this paper, we present three simple calibration modeling tactics that should be the starting point for every DEM simulation of dry and semi-dry granular material. "It was a pleasure working with you, and I'm sure we'll be doing more together. The foundation of fracture mechanics was laid in the 1920s by A.A. Griffith while he was working for the Royal Aircraft Establishment at Farnborough, U.K. Define types of alternative immunization schedules and patterns of undervaccination that could be evaluated, focusing on the first 24 months of age 2. "Gordon, thank you for helping to drive this white paper to completion. Multi-Laser Solutions A white paper is a one-to five-page document that describes a given problem and proposes a specific solution to the problem. An Excerpt From the White Paper: Standard Normal Modes Analysis: To see how this is applied in practice, we will run through an analysis project from start to finish (Normal Modes, Modal Frequency, PSD and Direct Transient). What’s Covered: Foundation of Frequency Analysis, Standard Normal Modes Analysis, Modal Frequency Analysis, PSD Analysis, Direct Transient Analysis, Model Checkout (mass and constraints) and Additional Reading. Every existing approach (hard copies, couriers, faxes, e-mail, CDs, flash drives) is dismissed in turn; this is a sign of a problem/solution white paper. Modal Frequency Sweep (MFS): Frequency-based loads are more common than you might think. "It gets right to the heart of explaining how bar code technology can help companies get or maintain a competitive edge. Depending on the potential failure mode our anxiety might not be too high, but given today’s demanding OEMs and litigious public, the task could involve high drama with your name written all over it. Investigate these directions and see if they correspond to your forcing-function direction. "I wanted to tell you how pleased I am with how this white paper came out. In essence, it allows us to assess the maximum dynamic response (stress, acceleration, velocity or displacement) of a structure using a very simple analysis technique (normal modes). "This paper turned out just great; exactly like I was hoping it would. Media Files: APA Sample Student Paper , APA Sample Professional Paper This resource is enhanced by Acrobat PDF files. The paper explains why you don't always get what you want—and how to get what you need when analyzing data's true colors. Lastly, the CBUSH element will be introduced and applications given on how to use this replacement for the CELAS element. For example, if you have an ICO backed by an adult store, try to steer clear from a provocative white paper design, as it might seem irrelevant in terms of an ICO campaign. What is bolt preload? Click on the image to download the PDF. Since that was rather straightforward, let's look at something a bit more complex. Important Chapters in this Handbook are: Composite Micromechanics, Laminate Modeling in Femap, Creating a 2D Laminate Model in Femap, Creating a 3D Laminate Model in Femap, Modeling a Sandwich Composite, Laminate Failure Theories in Femap, Modeling the Failure Behavior of Composite Laminates, Four-Point Bending of a Sandwich Composite Using Femap and NX Nastran and a very useful Addendum. You took a draft written by six different contributors and quickly turned it into a cohesive document with a single voice. You are smart enough to fill in the rest. The PCB is screwed into a heavy component at the ends. This discussion has not considered the effects of fatigue, corrosion, or thermal mechanisms on the fracture process-these can play a dominant role depending on the service environment. This white paper will walk you through the use of NX Nastran and LS-DYNA to do classical Eulerian Buckling, geometric nonlinear buckling and complete, full-physics nonlinear buckling (LS-DYNA). He will help us further investigate the Stress intensity factor for Mode II (KIIC ) in glass, calculate acceptable values for flaw density, and develop scale model tests to quantify safe working stresses and cycle life. In Part 2 of the Desktop Engineering magazine article, we explore vibration analysis and how it can show detailed structural behavior under dynamic loading. What We Did: Dr. George Laird, Predictive Engineering - DOER contracted with Dr. Laird to model and study glass mechanics and brittle material failure modes and mitigation using Finite Element Analysis (FEA) and other tools. Become a better writer. Finite element analysis is a numerical technique that solves continuum problems with an accuracy acceptable to engineer. Marketing Communications predictive_engineering_white_paper_on_nx_nastran_connection_elements_rbe2_rbe3_and_cbush_rev-1.pdf, principles_of_vibration_analysis_with_femap_and_nx_nastran_from_normal_modes_to_psd_to_direct_transient_analysis_rev-0.pdf. The reason we want to use a response spectrum is that it allows us to analyze transient events (time based events) without having to review hundreds or thousands of results sets. These random vibrations are usually described in terms of a power spectral density (PSD) function. January 1, 2018, Introduction………………………………………………………….page 1 This 100+ page Handbook is intended to be the starting point for engineers that are interested in simulating the mechanical response of composite materials using Femap and then analyzing their models using NX Nastran or LS-DYNA. "We're determined to talk about issues that matter to our audience. You can click on any thumbnail to see that white paper. Several innovative examples of MOUs follow. This Predictive Engineering white paper was delivered at the 13th International LS-DYNA User's Conference and was developed to support our LS-DYNA consulting services work. This sample lists three industry challenges, using the structure of a problem/ solution white paper. However, as you know, white papers are traditionally at least six pages long. Within the field of vibration analysis, the most common type of analysis is that based on the linear behavior of the structure or system during its operation. Making Your Ride Smooth As Silk: Ever wonder what makes a quiet ride in a motor vehicle? That’s a lot to handle in a blog, and I didn’t want to bore you with a lot of useless verbiage anyway. With enough modes, you get 100 percent of the mass of the structure, though for complex structures this can mean hundreds of modes. "Gordon, I can't tell you how well you captured this subject. ", —Sally Cole, Marketing Manager White Paper on Writing White Papers 1 June 2016 4 Longer white papers may include a table of contents and a list of tables and figures. "Customers are finding this white paper incredibly helpful. "I know it was a difficult one, but you did a spectacular job... taking very technical info and delivering it in an easy-to-understand way. Power Spectral Density (PSD) Analysis: Satellites are expensive and failure is even more expensive.
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