EME 236 Properties and Mechanics of Materials           4 credits               

Pre: MAT160,EME106,EME231 

Description:
This course provides an introduction to materials and  solid mechanics.  This includes understanding how the microscopic scale properties impact the macroscopic properties (stress-strain, hardness, deflection, fatigue, and creep) of typical engineering materials.  Topics in solid mechanics include deformation, strain, stress, Mohr's circle, shear and bending moment diagrams, simple structural members (axial truss members, shafts in torsion, beams in extension and bending, columns and buckling, pressure vessels).  The class also included FEA modeling of stress and strain, limited experiments with materials, and a design project with a focus on structural strength and performance. 

Objectives:
To provide an introduction to materials and solid mechanics including the study and quantitative determination of stress, strain, stability, deflection, fatigue, and creep.
To learn to analyze structures and predict failure of material under a variety of loading types.
To understand how altering geometry and shape can be used to minimize stress.
To apply CAD and FEA in the development and assessment of structural designs.
To practice design process and teamwork.

Meets:
Section 1:  MWF at 19:00 p.m. to 10:50 p.m. in Science 118
                 and  T at  9:00 to 10:50 a.m. in Science 118

Textbooks.   Mechanics of Materials, 2nd ed,  by R.C. Hibbeler, pub. by Prentice Hall.

Link to Course Syllabus

Projects:  
     Project A:  Design, build, and test  a polystyrene beam to support maximum load with a specified
                         failure location.
     Project B:  Design, build, and test the components needed to make a machine which will be used to 
                         apply a specified load.
        

Grading: The final numerical course grade will be weighted on:
         Attendance.................................................................5%
         Homework and Portfolio...........................................15%
         Lab and Design Work...............................................20%
         Tests.........................................................................40%
         Final Exam................................................................20%
  

Lectures for Spring 2010: (to be added as written or revised)
Week 1: Lecture 01: Internal Reactions and Axial Stress..........................HW 1
               Lecture 02:  Simple Stress..............................................................HW 2
               Lecture 03:  Simple Strain...............................................................HW 3
Week 2: Lecture 04: Tensile Test and Hooke's Law....................................HW 4
               Lecture 05: Poisson's Ratio and Modulus of Rigidity....................HW 5
               Lecture 06: Axial Stress and Strain.................................................HW 6
Week 3: Lecture 07: Indeterminate Axial Loads..........................................HW 7
                Lecture 08: Thermal Expansion and Induced Stress.....................HW 8
                Lecture 09: Stress Concentration...................................................HW 9
Week 4:  Lecture 10: Review for Test #1......................................................HW 10
                 ***no class  due to illness************
                 Test 1
Week 5:  Lecture 12: Shear Stress in Torsion.............................................HW 12
                Lecture 13:  Angle of Twist in Torsion..........................................HW13
                Lecture 14:  Indeterminant Structures in Torsion.........................HW14
Week 6:  Lecture 15: Noncircular and Thinned Wall Shafts........................HW15
                Lecture 16: Shear and Moment Diagrams....................................HW16
                Lecture 17: Bending Stress............................................................HW17
Week 7:  Lecture 18: Workout Problems on Shear Moment Diagrams
                 Lecture 19: Composite Beams......................................................HW19
                 Lecture 20: Stress Concentrations in Beams and Review ..........HW20
Week 8:   Test 2
                 Lecture 22: Transverse Shear Stress in Beams...........................HW22
                 Lectrue 23: Shear Flow in Beams..................................................HW23
******************Spring Break *************************************
Week 9:  Lecture 24: Thin walled Pressure Vessels.....................................HW24
                 Lecture 25:Combined Loading.......................................................HW25
Week 10: Lecture 26:Review for Test 3.............................................no homework
                 Test 3 Part B
                  Lecture 29: Stress Transformation............................................. HW 29
Week 11:  Lecture 30:  Mohr's Circle for plane stress.................................HW 30
                  Lecture 31:  Mohr's Circle for 3-dim.............................................HW 31
                  Lecture 32:  Stain Transformation for Plane Strain......................HW 32
Week 12:  Lecture 33:  Strain Gages.............................................................HW 33
                  Lecture 34:  Failure Theory for Multi-axial stress.....................HW 34
                  Lecture  35:  Problem workday...................................................no hw
Week 13:  Lecture 36: Deflection by Integration..........................................HW 36
                  Lecture 37: Statically Indeterminate Beams...............................HW 37
                  Workday on beam deflection  
Week 14:  Lecture 38: Columns and Review for Final................................ HW 38
                   Review for Final
 

Labs for Spring 2010: (to be added as revised or written)
Lab 01:  Introduction to COSMOSWorks
Lab 02: Curved Beam Loading with COSMOSWorks
Lab 03: Iterative Bracket Design with COSMOSWorks
Lab 04: Torsion Stress Concentrations with COSMOSWorks
Lab 05:  ******continuation of lab 04***
Lab 06: Beam Design Lab
Lab 07: ******continuation of lab 06***
Lab 08: ****** continuation of lab 06***
Lab 09:  Helical Spring Lab 
Lab 10:  Test 3: Part A
Lab 11:  Strain Gage Lab: Day 1
Lab 12:  Strain Gage Lab: Day 2
Lab 13:  Strain GAge Lab Day 3
Lab 14:

Homework Solutions: (to be added as they become available):

Old Lectures from Spring 2009:
Week 1:  Lecture 01: Static Eq. and Axial Stress............................................1/28/2009
                Lecture 02: Shear Stress and Simple Connections...........................1/30/2009
Week 2:  Lecture 03: Strain...............................................................................2/2/2009
                Lecture 04: Tensile Test and Hooke's Law.......................................2/4/2009
                Lecture 05: Poisson's Ratio and Modulus of Rigidity......................2/6/2009
Week 3:  Lecture 06: Axial Stress and Strain...................................................2/9.2009
                Lecture 07: Indeterminate Axial Loads.............................................2/11/2009
                Lecture 08: Thermal Expansion and Induced Stress........................2/13/2009
Week 4:  Lecture 09: Stress Concentration......................................................2/16/2009
                Lecture 10: Review for Test #1.........................................................2/18/2009
                Lecture 11: Test #1............................................................................2/20/2009
Week 5: Lectrue 12: Shear Stress in Torsion.................................................. 2/23/2009
               Lecture 13: Shear Strain and Angle of Twist in Torsion....................2/25/2009
               Lecture 14: Indeterminate Structures in Torsion...............................2/27/2009
Week 6: Lecture 15: Noncircular and Thinned Wall Shafts............................3/2/2009
               Lecture 16: Shear and Moment Diagrams........................................3/4/2009
               Lecture 16B: More Shear and Moment Diagrams...........................3/6/2009
Week 7: Lecture 17: Bending Stress...............................................................3/9/2009
               Lecture 18: Bending Stress in Nonsymmetric sections...................3/11/2009
               Lecture 18B:  Quiz and problem solving day....................................3/13/2009 
****************Spring Break  March 16 - March 22************************
Week 8:  Lecture 19:  Compositie Beams.......................................................3/23/2009
                Lecture 20:  Stress Concentration and Review for Exam...............3/25/2009
                Lecture 21:  Test #2..........................................................................3/27/2009
Week 9:  Lecture 22:  Transverse Shear.........................................................3/30/2009
                Lecture 23:   Shear Flow....................................................................4/1/2009
                Lecture 24: Thin walled Pressure Vessels.........................................4/3/2009
Week 10: Example Problems workday.............................................................4/5/09
                 Lecture 25:Combined Loading.........................................................4/7/09
                 Easter Break......................................................................................4/9/09
Week 11: Easter Break......................................................................................4/13/09
                 Lecture 25: Combined Loading continued........................................4/15/09
                 Lecture 26: Workout problems.........................................................4/17/09
Week 12: Lecture 27: Review for Test #3........................................................4/20/09
                 Lecture 28: Stress Transformation.................................................4/22/09
                 Test #3....................................................................... .......................4/24/09
Week 13: Lecture 29:  Mohr's Circle for plane stress....................................4/27/09
                  Lecture 30:  Mohr's Circle for 3-dim................................................4/29/09
                  Lecture 31:  Stain Transformation for Plane Strain......................5/1/09
Week 14:  ...Instructor Ill...no class     ............................................................5/4/09
                  Lecture 32:  Strain Gages..............................................................5/6/2009
                  Lecture 33:  Failure Theory for Multi-axial stress.....................5/8/2009
Week 15:  Lecture 34: Deflection by Integration..........................................5/112009
                  Lecture 35: Statically Indeterminate Beams...............................5/13/2009
                  Lecture 36: Columns and Review for Final.................................5/15/2009
                  Equation Sheets for Final
       

Old Labs for Spring 2009:
Lab 01:  Intro to COSMOSWorks..................................................................2/3/2009
Lab 02:  Curved Beam Analysis with COSMOSWorks................................2/10/2009
Lab 03:  Iterative Bracket Design..................................................................2/17/2009
Lab 04:  Continuaton of Week 3 lab...............................................................2/24/2009
Lab 05:  Torsion Stress Concentrations........................................................ 3/3/2009
Lab 06:  Continueation of Lab 05...................................................................3/10/2009
Lab 07:  Continueation of Lab 05...................................................................3/17/2009
***************Spring Break..................................................................

Lab 08:  Beam Design .....................................................................................3/24/2009
Lab 09:  Beam Design Build and Test.............................................................3/31/2009 
Lab 10: Data Work Day.
Lab 11: Beam Deflection Testing
Lab 12: Data Work Day
Lab 13:  Working with the Tensile Test Station
Lab 14: Strain Gages
Lab 15:

Lectures from Spring of 2008: 
Week 1:  Static Eq. and Axial Stress............................................1/28/2008
                Shear Stress and Simple Connections...........................1/30/08
                Strain...............................................................................2/1/08
Week 2: Tensile Stress Test and Hooke's Law............................2/4.2008
                ..................Snow Day......................................................2/6/2008
               Shear Strain Test and Poisson's Ratio...........................2/8/2008
Week 3: Axial Loading and Deformation.....................................2/11/2008
               Statically Indeterminate Axial Loads.............................2/13/2008
               Thermal Stresses............................................................2/15/2008
 Week 4: Stress Concentrations ..................................................2/18/2008
                Torsional Load

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Email: clark.merkel@loras.edu

Last Modified: January 2008    

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