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Engineering Mechanics / College of Engineering
E M 324 Mechanics of Materials
Spring 2020 Syllabus revised with clarifications April 9, 2020

Part 1: Course Information

Sections 1&6 (MWF 9:00-9:50, Howe 1140*); Section 4 (MWF 11:00-11:50, Pearson 1115*)
*March 23 – May 1: content delivery Canvas. Check Announcements, Files, and Modules.

Instructor

Professor Johannsen, 2316 Howe, jennyjo@iastate.edu

Office hours January 13 – March 11: MWF 10:00am-10:30am; Thursdays 10:30am-12:00noon.
March 23 – May 1: 15-minute WebEx appointments available MWF 9:00-10:00; 11:00-12:00.
No office hours on dates when ISU classes do not meet (Monday, January 20; March 16-March 20).
Office hours will be most useful to you if you enter my office prepared to ask your question with your solution attempt in-hand, neatly written on plain white paper or engineering paper. There is not time to search through your backpack or boot up your computer. You may attend office hours individually or in groups, but office hours are not tutoring sessions. You may not ask, “I wasn’t in class; what did I miss?”

Course Description (from ISU Course Catalog, 2019 – 2020)

(3-0), Cr. 3. Plane stress, plane strain, stress-strain relationships, and elements of material behavior. Application of stress and deformation analysis to members subject to centric, torsional, flexural, and combined loadings. Elementary considerations of theories of failure, buckling.

Course Prerequisites (and previous knowledge expected)

Credit in Engineering Statics (E M 274)

• Vector analysis of forces and moments
• Force components and resultants
• Moment of a force about a point and about a line
• Equivalent force-couple systems
• Complete and correct free-body diagrams
• Static equilibrium analysis of free-body diagrams to determine reactions at supports and at connections and internal forces and moments in structural members
• Axial force diagrams and torque diagrams
• Shear force and bending moment diagrams and equations
• Centroid and area moments of inertia (second moments of area)

Required Textbook

Mechanics of Materials: An Integrated Learning System, 4th Edition, by Timothy A. Philpot; Wiley, 2018 WileyPLUS registration information Johannsen.pdf

Problem-Solving Practice (Homework)

Students are encouraged to practice their problem-solving strategies and techniques by trouble-shooting and resolving differences among each other’s solutions. Required problems are listed on the course outline, and additional problems should be practiced as necessary to achieve the learning outcomes for the course. Students should show all steps of the solution process on engineering paper or plain white paper and report the final answer with 3- or 4-digit accuracy and appropriate units.

Additional Resources

For information about resources such as tutors, academic coaching, and supplemental instruction, visit the Academic Success Center website: http://www.asc.dso.iastate.edu. Supplemental Instruction (SI) is offered for this course. For information about the days, times, and locations for SI sessions, refer to the SI website: www.si.iastate.edu

Exams

Two of the three mid-semester exams are night exams – from 8:15 to 9:45pm – in Hoover Hall. The third mid-semester exam will be a 90-minute exam that you will complete within Canvas. The final exam will most likely be a 2-hour exam that you will complete within Canvas. After the final exam schedule is announced, please ensure you will have reliable internet during that timeframe, and remember that the times listed are Central Time. Make-up exams will be given only for unusual circumstances and/or approved medical excuses. For anticipated conflicts with a scheduled exam, you must contact your instructor before the exam to request and attempt to arrange an alternate exam. All requests for make-up exams must be submitted in writing or by email and must include the reason for the request and a copy of your schedule.

Part 2: Course Learning Objectives

Enduring Understanding

The purpose of this course is to develop the thought process and discipline of students to enable them to solve structural loading and deformation problems systematically, confidently, and competently, regardless of difficulty. Students will understand that:

• The deformation (stretching, twisting, and bending) of structural members is directly related to the forces and moments in the members.
• Forces and moments in structural members are generated by stresses distributed throughout the members.

Emphasis

This course is intended to familiarize students with basic concepts of stress and deformation as a basis for continued work in structural analysis and machine design.

Specific Course Learning Outcomes

By completion of the course, students should be able to:

• Define each of the following mechanical properties: modulus of elasticity, ductility, yield strength, ultimate strength, and coefficient of thermal expansion; and describe how each property characterizes the material response of a linear elastic, homogeneous, isotropic material or structure.
• Apply section properties (first, second, and polar moments of area; radius of gyration) for the purpose of stress and deformation analysis of beams, shafts, and/or columns.
• Calculate and illustrate the normal and shear stress components, normal and shear strains, and deformation of standard idealized elements such as shafts, beams, columns, and thin-wall pressure vessels due to axial, torsional, and flexural loads, pressurization, and/or changes in temperature.
• Calculate and illustrate the magnitude and orientation of the principal stresses and maximum shear stresses at a given point within a structural element.
• Calculate and illustrate the normal and shear stresses at a given point on a given plane within a structural element.
• Given strain gauge measurements, calculate and illustrate normal and shear strains and normal and shear stresses at that point.
• Calculate and illustrate normal and shear stress concentrations resulting from discontinuities in section geometry such as holes, fillets, and grooves.
• Understand the basic types of mechanical failure for ductile and brittle materials and buckling of columns. Calculate the conditions which would result in yielding, fracture, or elastic instability and the factor of safety relative to such failures.

Educational Outcomes

The course’s learning objectives, assessment methods, and instructional techniques are formulated to address ABET Student Outcomes.

Part 3: Topic Outline/Schedule

Topic No.   Date   Reading     Topics                                                                                     Problem-Solving Practice DUE* (Previously, this was the date the homework was ASSIGNED, but this has been revised due to confusion.)
     1        M   1/13     1: 1-3         Normal and shear stresses  HW 1 = survey that will soon be available in Canvas, due Friday
     2       W   1/15     1: 4               Bearing stress; punching shear stress  In-Class Assignment (ICA) #1
     3        F   1/17     2: 1-3            Deformation; normal and shear strain                 
               M   1/20                             University holiday: classes recessed
     4       W   1/22     3: 1-4           Mechanical properties of materials                        HW 2; ICA #2
     5        F   1/24     4: 1-4            Allowable stress design                                                  HW 3
     6        M   1/27     5: 1-4          Axial loading                                                                          HW 4
     7       W   1/29     5: 5                Indeterminate axial loading                                         HW 5; ICA #3
               F   1/31                                Review for Exam 1                                                             HW 6
     8        M   2/3        5: 6               Temperature effects                                                         HW 7
     9       W   2/5        6: 1-3            Torsional shear stress and strain                             ICA #4
               W   2/5                                 NIGHT EXAM 1 Topics 1-6
               F   2/7                                   No class
    10        M   2/10     6: 5-6          Angle of twist                                                                       HW 8
    11       W   2/12     6: 9               Statically indeterminate torsion                               HW 9; ICA #5
    12        F   2/14     7: 1-3            Shear and moment equations and diagrams     HW 10
    13        M   2/17     8: 1-3           Flexural stress                                                                    HW 11
    14       W   2/19     8: 4-5            Flexural stress                                                                   HW 12; ICA #6
    15        F   2/21     8: 7                 Combined axial and flexural stresses                   HW 13
    16        M   2/24     9: 1-5           Shear stress in beams                                                    HW 14
    17       W   2/26     9: 6-7            Shear stress in circular or wide flange beams HW 15; ICA #7
    18        F   2/28     10: 1-3, 6     Beam deflection by discontinuity functions    HW 16
               M   3/2       10: 1-3, 6       Beam deflection by discontinuity functions    HW 17
    19       W   3/4       10: 7              Beam deflection by superposition                         HW 18; ICA #8
               F   3/6                                     Review for Exam 2                                                          HW 19
               M   3/9        10: 7                Beam deflection by superposition                        HW 20
    20       W   3/11   11: 1-2, 4-5    Statically indeterminate beam deflection ICA #9
               W   3/11                                NIGHT EXAM 2 Topics 1-18
               F   3/13                                  No class
               M   3/16 – F 3/20             Spring break; classes recessed
    21     M   3/23     12: 1-7           Stress transformation                                            DUE: HW 21 superposition beam defl'n
    22     W   3/25     12: 8-9          Principal stresses; maximum shear stress  DUE: HW 22 superposition beam defl'n
    23      F   3/27      12: 10            Mohr’s circle for plane stress                             DUE: HW 23 stat. indet. beam deflection
                M   3/30     12: 10            Mohr’s circle for plane stress                            DUE: HW 24 stress transformation
    24     W   4/1       15: 5                Failure theories                                     DUE: HW 25 principal stresses, max. shear stress
    25      F   4/3       13: 1-5, 7       Strain transformation; last date to drop    DUE: HW 26 Mohr's circle, stress transf'n
    26      M   4/6       13: 8          Strain rosettes; generalized Hooke’s law     DUE: HW 27 Mohr's circle, stress transf'n
                W   4/8                                                                                                                          DUE: HW 28 failure theories
               F   4/10                                                                                                                           DUE: HW 29 strain transformation
                M   4/13                                                                                                               DUE: HW 30 strain rosettes, gen. Hooke's law
               W   4/15                            EXAM 3 Topics 19-26 (HW 21-30)    8:15-9:45pm (Central Time) in Canvas                  
   27      F   4/17        14: 1-4        Thin-walled pressure vessels                                                                                                                
   28      M   4/20     15:1-4          Combined loading                                    DUE: HW 31 thin-wall pressure vessels; Project
              W   4/22     15: 1-4          Combined loading                                                DUE: HW 32 combined loading
                F   4/24       16: 1-3           Buckling                                                                   DUE: HW 33 combined loading
   29      M   4/27     5:7; 6:10; 8:9     Stress concentrations                               DUE: HW 34 buckling
   30      W   4/29                                                                                                                       DUE: HW 35 stress concentrations
                F   5/1
               M   5/4         CUMULATIVE FINAL EXAM Topics 1-30 (HW 2-35)          7:00-9:00pm Central Time in Canvas           

*The assigned homework problems should be considered a minimum assignment. Students should do as many additional problems as is necessary to understand the basic principles thoroughly.

Night Exams: February 5 and March 11 from 8:15-9:45pm in Hoover Hall. Room assignments in Canvas announcement.

Monday, May 4 7:00-9:00pm Comprehensive final exam Topics 1-30

Percentage	Description
57 %	Exams 1, 2, and 3 at 19% each
22 %	Cumulative Final Exam
10 %	7 best In-Class Assignment (ICA) scores
5 %	Project (submit in Canvas)
6 %	Problem-Solving Practice (Homework)

Part 4: Grading Policies

Late Work Policy

Deadlines are firm. There will be no make-up Exams, and Problem-Solving Practice (homework) will not be accepted without a serious and compelling reason and instructor approval. If, for any excused or unexcused reason, you are absent from class on a day when an In-Class Assignment is collected, you will receive no score for that ICA. Each student’s 7 best ICA scores will be used to compute the ICA portion of the course grade.

Letter Grade Assignment

This course does not utilize a curve for assigning grades. Letter grades will be will be assigned only for the final course grade according to the following grade scale:

Letter Grade	Percentage	Performance
A	90-100%	Excellent Work
A-	87-89.99%	Nearly Excellent Work
B+	84-86.99%	Very Good Work
B	80-83.99%	Good Work
B-	77-79.99%	Mostly Good Work
C+	74-76.99%	Above Average Work
C	70-73.99%	Average Work
C-	67-69.99%	Mostly Average Work
D+	64-66.99%	Below Average Work
D	60-63.99%	Poor Work
D-	57% - 59.99%	Mostly Poor Work; some Failing
F	0 -56.99%	Failing Work

Part 5: Course Policies

Prerequisite Requirement

It is the policy of the College of Engineering to require all students enrolled in this course to have satisfied all of the course’s prerequisite requirements. If a student has not met an applicable prerequisite requirement, he/she will be required to drop the course immediately. The failure to drop the course will result in a final course grade of F, regardless of course performance. Students who discover they have improperly enrolled in a course without meeting the applicable prerequisite requirements are strongly encouraged to meet with advising staff to drop the course promptly and make alternative scheduling arrangements or discuss whether an official waiver of the prerequisite requirements may be applicable.

Class Participation and Miscellany

• Pay close attention to deadlines. There will be no make-up exams or late assignments accepted without a serious and compelling reason and instructor approval.
• Attendance will not be recorded, but attendance and class participation are encouraged.
• Students should take their own notes. At the instructor’s discretion, supplemental resources may be provided through the course Canvas page.
• This course does not offer extra credit.
• Please silence your cell phone during class.

Professionalism, Inclusivity, and Mutual Respect

Iowa State University strives to maintain our campus as a place of work and study for faculty, staff, and students that is free of all forms of prohibited discrimination and harassment based upon race, ethnicity, sex (including sexual assault), pregnancy, color, religion, national origin, physical or mental disability, age, marital status, sexual orientation, gender identity, genetic information, or status as a U.S. veteran. Any student who has concerns about such behavior should contact his/her instructor; Student Assistance http://new.dso.iastate.edu/sa/, 515-294-1020 or email dso-sas@iastate.edu; or the Office of Equal Opportunity and Compliance http://www.hrs.iastate.edu/hrs/node/99 or 515-294-7612.

The classroom will be a place where everyone is treated with due respect. That includes accommodation of recipients’ choice of pronouns or titles. Your comments to others should be constructive and free from harassing statements. Strive to include everyone and select ideas and solutions on their merits, not based on prejudices and personalities. Mutual respect is expected inside and outside the classroom. Please contact Professor Johannsen if you have suggestions for improving the classroom environment.

Accessibility Statement

Iowa State University is committed to assuring that all educational activities are free from discrimination and harassment based on disability status. Students requesting accommodations for a documented disability are required to work directly with staff in Student Accessibility Services (SAS) to establish eligibility and learn about related processed before accommodations will be identified. After eligibility is established, SAS staff will create and issue a Notification Letter for each course listing approved reasonable accommodations. This document will be made available to the student and the instructor either electronically or in hardcopy every semester. Students and instructors are encouraged to review contents of the Notification Letters as early in the semester as possible to identify a specific, timely plan to deliver/receive the indicated accommodations. Reasonable accommodations are not retroactive in nature and are not intended to be an unfair advantage. Additional information on assistance is available online at www.sas.dso.iastate.edu, by contacting SAS staff by email at accessibility@iastate.edu, or by calling 515-294-7220. Student Accessibility Services is a unit in the Dean of Students Office located at 1076 Student Services Building.

Religious Accommodation

If an academic or work requirement conflicts with your religious practices and/or observances, you may request reasonable accommodations. Your request must be in writing, and your instructor will review the request. More information may be found at: http://www.eoc.iastate.edu/discrimination/religious.

Academic Dishonesty

All acts of dishonesty in any work constitute academic misconduct. The Student Disciplinary Regulations will be followed in the event of academic misconduct. Depending on the act, a student could receive an F grade on the test/assignment, receive an F grade for the course, or be suspended or expelled from the University. Academic misconduct includes all acts of dishonesty in any academically-related matter and any knowing attempt to help another student commit an act of academic dishonesty that includes, but is not limited to

• obtaining or attempting to use unauthorized information, especially during an exam
• tendering of information, such as sharing course content or uploading it to any website (including but not limited to: problem statements from current or past exams or assignments; textbook or instructor solutions to assignments or exams, and lecture notes posted by your instructor - these are the intellectual property of the textbook author or your instructor!)
• misrepresentation, such as logging into any system using any credentials other than your own
• plagiarism, such as submitting anyone else’s solution as your own

when performed in any type of academic or academically-related matter, exercise, or activity. See the Conduct Code at www.policy.iastate.edu/policy/SDR for more details (See 4.2.1) and a full explanation of the Academic Misconduct policies.

Build Rapport

If you find that you have any trouble keeping up with homework or other aspects of the course, inform your instructor as early as possible. As you will find, building rapport and effective relationships are key to becoming an effective professional. Be proactive in informing your instructor when difficulties arise during the semester so that we can help you find a solution.

Understand When You May Drop This Course

It is the student’s responsibility to understand when they need to consider dis-enrolling from the course. Refer to ISU’s policy for dates and deadlines for registration. The deadline to obtain Professor Johannsen’s signature to process a drop slip is Friday, March 27 12:30pm so that the student may submit the form before 5:00pm. After this deadline, a serious and compelling reason is required to withdraw from the course. Serious and compelling reasons include documented and significant change in work hours, leaving student unable to attend class; or documented and severe physical/mental illness/injury to the student or student’s family.

Dead Week

This class follows the Iowa State University Dead Week policy as noted in section 10.6.4 of the Faculty Handbook: http://www.provost.iastate.edu/faculty-and-staff-resources/faculty-handbook.

Academic Issues

If you are experiencing or have experienced a problem with any of the above issues, email academicissues@iastate.edu.

Course policies are subject to change. It is the student’s responsibility to check the course Canvas page for announcements and corrections or syllabus updates. Any changes will be posted in Canvas.