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Thursday, 30 June 2011

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Tuesday, 28 June 2011

Flexural strength is defined as three points of flexural test.
  • D = 3FL/2bh3. D is flexural strength,
  • F is maxmum load,
  • L is distance of fulcrum to fulcrum,
  • b is sample width
  • h is sample thickness.
  • The unit of Young's modulus, flexural modulus and flexural strength is MPa
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    Flexural modulus is defined as three points of flexural test.
    • E = L3F/4bh3Y. E is flexural modulus,
    • L is distance of fulcrum to fulcrum,
    • b is sample width,
    • h is sample thickness,
    • F is load at linear part and Y is flexure at F.
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    Sunday, 6 February 2011

    [DIR]sp08/20-Mar-2008 13:27
    [DIR]sp09/26-May-2009 15:00
    [DIR]sp10/20-May-2010 12:49
    [DIR]winter_11/03-Jan-2011 14:52
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    Simulia LogoAbaqus Logo

    THIS PAGE CONTAINS INFORMATION SPECIFIC TO ABAQUS. FOR ADDITIONAL INFORMATION CHECK OUR  GENERAL FEA SOFTWARE SUITES PAGE.

    Overview

    ABAQUS Finite Element Software was developed by David Hibbitt,Dr. Bengt Karlsson and Paul Sorensen in 1978. ABAQUS finds application across a wide range of industries ranging from nuclear, offshore, automobile, aerospace, bio-medical and consumer industries. ABAQUS software is available in 3 packages:
    • ABAQUS/Standard
    • ABAQUS/Explicit
    • ABAQUS/CAE

    ABAQUS/Standard

    ABAQUS/Standard provides technology to solve traditional implicit finite element analyses, such as static, dynamics, thermal, all powered with the widest range of contact and nonlinear material options. ABAQUS/Standard also has optional add-on and interface products which address design sensitivity analysis, offshore engineering, and integration with third party software, e.g., plastic injection molding analysis.

    ABAQUS/Explicit

    ABAQUS/Explicit introduced in 1991, provides solutions to solve transient dynamics and quasi-static analyses using an explicit approach appropriate in many applications such as drop test, crushing and many manufacturing processes.

    ABAQUS/CAE

    ABAQUS/CAE provides a tool for interactive building of finite element models that interfaces with popular CAD packages and results visualization, was released in 1999. With direct access to CAD models, advanced meshing and visualization, and with an exclusive view towards ABAQUS analysis products, ABAQUS/CAE is the modeling environment of choice for many ABAQUS users.
    A brief history of ABAQUS can be found on ABAQUS website

    Support Information

    North America Europe Japan Asia Pacific and Australia
    North American Support-1-401-276-4400
    email Technical Support

    Training

    Description of Abaqus Training Courses
    Abaqus Training Schedules
    Course Registration
    Testing and Analysis of Elastomers for Users of ABAQUS - axel physical testing services
    Related Articles
    How to Roll It Right the First Time - Metalforming Simulation in ABAQUS - Desktop Engineering
    Will the crash zone crumple? FEA tells - Simulation using ABAQUS/Explicit - Machine Design
    Simulating Crashworthiness At BMW - Design News
    Low Stress Welding Simulations - ABAQUS helps with complex modeling and simulation of welding processes - Desktop Engineering
    Simulation on the Spot - Simulation using ABAQUS/CAE - Desktop Engineering
    Finite element analysis helped Boeing eliminate oiled bearings on its Chinook helicopter - Mechanical Engineering Magazine
    More ...

    Tutorials

    "Using ABAQUS" Tutorial at University of Illnois Urbana-Champaign
    "Using ABAQUS - Beam Analysis" Tutorial at University of Illnois Urbana-Champaign
    ABAQUS Tutorials at Brown University
    ABAQUS Tutorial at Purdue University
    ABAQUS Tutorial at Georgia Tech
    Introduction to ABAQUS at New Mexico Tech
    ABAQUS 6.6 Documentation at University of Calgary
    Presentation - FEA of Elastomers and Gaskets in ABAQUS - Tod Dalrymple, HKS Michigan and Kurt Miller, Axel Products
    Presentation - Rubber Material Curve Fitting with ABAQUS/ CAE - Tod Dalrymple, HKS Michigan and Kurt Miller, Axel Products, Inc.

    ABAQUS Web Resources

    ABAQUS FAQ at University of Cambridge
    Nonlinear material models - PolymerFEM.com
    Elastomer testing and technical downloads at axel physical testing services
    ABAQUS Jobs - ABAQUS.COM
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    Term:

    Announcements

    • Jan 10: The official course web page is on WebCT..

    Instructor

    • Prof. Jim Craig (james.craig@ae.gatech.edu) This is the best way to contact me!
      • Office: Weber 211C
      • Phone: x4-3042
      • Hours: after class or by appointment (suggest using email to arrange)

    General

    • Course Outline -
    • Course Textbook
      • Logan, Daryl, A First Course in the Finite Element Method, 4th Edition, Thomson 2007, ISBN 0-534-55298-6.
      • Online tutorials and reference material for Abaqus finite element software
      • Additional online notes as needed.
    • Homework Grading: Homework will be assigned on an approximately weekly basis, and will be graded.

    Course Materials

    Homework Problem and Solutions

    Note: solutions will be posted for a limited period of time.

    • Available only on WebCT

    Quizzes, Exams and Solutions

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    [DIR] 2D_Aluminum Bracket/    03-Nov-2006 09:08    -   
    [DIR] Non-Circular_Cut_out/   03-Nov-2006 09:08    -   
    [DIR] Plate_buckling/         03-Nov-2006 09:08    -   
    [DIR] Plate_with_hole/        03-Nov-2006 09:08    -   
    [   ] 2D_Aluminum_Bracket.pdf 19-Jun-2006 00:35  433K  Document
    [   ] ABAQUS_Getting_Start..> 19-Oct-2007 10:54   32K  Document
    [   ] Dr.HaislerInstallmen..> 30-Oct-2006 10:32  775K  Zip Archive
    [   ] Installment_I_CaeOdb..> 03-Nov-2006 09:08  438K  Zip Archive
    [   ] nonCircularCutout_v2..> 14-Sep-2006 18:45  725K  Document
    [   ] plateBuckling.doc       09-Jun-2006 15:09  138K  Document
    [   ] platewithHole_v2.doc    14-Sep-2006 17:42  319K  Document
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    Syllabus - Spring 2007
    Lecture Notes
    Introduction to FEM Theory and Analysis for Engineers (in .ppt format)
    A04, Introduction to Finite Element Theory
    A01, Sizing Procedures
    A02, External Loads
    A03, Material Properties
    A05, Bending and Extension of Thin Plates (Theory & Analytical Solution)
    A06, Plate Bending Finite Element
    A07, Introduction to Composite Materials
    A08, Effective Moduli of Continuous Fiber-Reinforced Lamina (transformation of stiffness from material 1-2
              to global x-y axes, effective stiffness for a laminate, force & moment resultants, stress & strain in lamina)
    Laminated Composite Plate Analysis Code (.exe file), Laminate Code Input Instructions, sample material file (.txt file), Foam_core_H45 (.txt file), Foam_core_HT90 (.txt file),   Examples of Numerical Results
    A09, Laminate Plate Analysis
    A10, Introduction to Column Buckling
    A11, Introduction to Buckling by T. Pollock (pdf)
    A12, Design for Buckling of Columns and Plates
    A13, Materials Selection in Structural Design

    FEMAP Tutorials
    Tutorial 1 - Plane Stress Modeling of a Uniaxial Rod with Axial Point Load (for Femap v9 and NX Nastran) - pdf file
    Tutorial 2 - Plane Stress Modeling of Beam Bending (for Femap v9 and NX Nastran) - pdf file
    Tutorial 3 - Plane Stress Modeling of Beam Bending with Modeling of Support Structure Included (for Femap v9 and NX Nastran) - pdf file
    Tutorial 4 - Plane Stress Modeling of a Plate with a Circular Hold (for Femap v9 and NX Nastran) - pdf file
    Plane Stress Modeling of Uniaxial Rod and Cantilever Beam with Point Load (for Femap v8.2)
    Plane Stress Modeling of Flat Plate with Hole and Distributed Edge Loads
    Simple Wing Spar (pdf)
    Simple Wing Box Beam (zip)
    Simple Rectangular Wing Planform with symmetric airfoil (zip)
    B707 Tapered, Swept Wing (zip)  

    ABAQUS Tutorials
    ABAQUS 6.6 Documentation (on aero web site)
    Tutorial 1 - Analysis of an Aluminum Bracket in Plane Stress (pdf file)
    Tutorial 2 - Flate Plate with Hole (Word file)
    Tutorial 3 - Plate with Non-Circular Cutout (Word file)
    Tutorial 4 - Plate Buckling (Word file)

    Reference Material
    Aircraft Structural Details (Photos) - opens a new browser window
    Links to Structures, Design, FEM, MIL Handbooks, and geneneral Aerospace Engineering Topics

    Project/Homework Assignments
    Homework 1, Homework 2, Homework 3, Homework 4
    Getting Familiar with FEMAP (7 & 8) and CAEFEM , Getting Familiar with FEMAP 9.0 and NX Nastran
    Femap 7.1 Example Mod files:  Ch3post.mod, Ch4done.mod, Ch7wing.mod    <- Right click on link and select "Save as"
    FEMAP 7.1 instructions for Chapter 3 Plate with Hole problem (for Ch3post.mod file)Project 0.5 - Bracket with end moment applied
    Project 1 - Cantilever Spar Beam
    Project 2 - Cantilever Wing Box Beam
    Major Project 3 - Definition and time table - Define your own Major Project
    Alternate Major Project 3 - Urica Wing Structure Design by FEM, Urica I- delta cp plot for cruise condition (.bmp),
                                                             Urica I- delta cp data file for cruise condition (.dat)
    Major Project 3 Report Requirements
    Project 4 - Laminated Plate Design
    Project 5  - Stiffened Plate Buckling Design
     



    Some Very Useful Information for Students
    Tips on maintaining confidence, taking tests, understanding different learning styles, and identifying and taking advantage of learning resources on campus.  Follow this link to Professor Richard Felder's page for several useful and/or interesting articles for students. Professor Felder is the Hoechst Celanese Professor of Chemical Engineering at North Carolina State University and has contributed over 100 publications to the fields of engineering education and chemical process engineering.
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     Lectures    M/R 2:00-3:20 pm, Carnegie 102
      Download Course Description
     
     Instructor information  
     Professor Suvranu De
     Room JEC 5002
     Email:des_at_rpi_dot_edu
     Office Ph: X6096
     Office hrs: M  3:30-4:30 pm
     Textbook:
      None required
      Lecture notes are posted here at the course website.
      Other reference texts: 
       1.      Numerical approximation of partial differential equations, A. Quarteroni and A. Valli, Springer-Verlag.
       2.      Meshfree particle methods, S. Li and W.K. Liu, Springer.
       3.      Finite element procedures, K. J. Bathe, Prentice Hall
       4.      Integral equations, W. Hackbusch, Birkhauser
      Blog: iMechanica

      Lecture Notes:

      Introduction ( lec1.ppt ) [1/24]
          Mathematical Preliminaries (lec2.ppt ) [1/27]  Polynomial interpolation (lec3.ppt ) [1/31, 2/03]
      Least squares and moving least squares approximations (lec4.ppt ) [2/07, 2/10] 
      Kernel estimates and partition of unity approximations (lec5.ppt ) [2/14]
      Strong formulation, minimization principle and the variational formulation (lec6.ppt ) [2/17] 
      Approximation techniques: Rayleigh-Ritz and Galerkin methods (lec7.ppt ) [2/24]
      Error analysis of Galerkin methods (lec8.ppt ) [2/28] 
      Other approximation schemes (lec9.ppt ) [3/03, 3/21]
      Local Galerkin weak forms (lec10.ppt ) [3/24]  Discontinuities (lec 11.ppt ) [3/24]
      Imposition of constraints (lec12.ppt ) [3/28, 3/31]  Introduction to integral equations(lec13.ppt)     [04/04, 04/07]
      Discretization convergence theory for integral equation methods ( lec14.ppt ) [4/11]
      Numerical integration  (lec15.ppt) [4/14, 4/18]



      Homework
      Homework #1   due Feb 24        Homework #2    due Mar 31       
      Homework #3   due Apr   07   download gauss.m  Homework #4    due Apr 28     

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    Saturday, 5 February 2011

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    Name:Stressing a Plate with a Circular or Elliptical Hole
    Author:Nanshu Lu, Harvard University
    Level:Fundamental
    Analysis:Linear Structural
    Duration:1 hr
    Download:Stressing a Plate with a Circular or Elliptical Hole
    Description:
    • Create part.
    • Define material properties.
    • Assemble the model.
    • Apply loads and boundary conditions.
    • Mesh.
    • Run analysis.
    • View results.
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    Name:3 Bar Truss Example Problem
    Author:Nanshu Lu, Harvard University
    Level:Fundamental
    Analysis:Linear Structural
    Duration:3 hr
    Download:3-Bar Truss Example
    Description:
    • Create part.
    • Define material properties.
    • Apply loads and boundry conditions.
    • Mesh.
    • Run analysis.
    • View results.
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    Name:Large Deformation Analysis of a Beam-Plate in Bending
    Author:Hyonny Kim, University of California
    Level:Fundamental
    Analysis:Linear Structural
    Duration:2 hr
    Download:Large Deformation Analysis of a Beam-Plate in Bending
    Description:
    • Create a 3D model using shell elements.
    • Conduct a geometrically nonlinear analysis (usingNlgeom* option).
    • View the results of the analysis.
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