University of Arizona s4

UNIVERSITY OF ARIZONA Department of Civil Engineering and Engineering Mechanics

CE215 – MECHANICS OF SOLIDS SYLLABUS & POLICY SPRING 2009

Professor: Tribikram Kundu, Room 324D, Civil Engineering Building Phone: 621-6573 email: [email protected] Lecture: MWF 11:00 - 11:50 a.m., AME S212 Office hours: MWF 10 - 10:50 a.m. Textbook: Mechanics of Materials, Brief Custom Publication, 6th Ed., J. M. Gere Class Note (Optional):Zip Notes for Civil Engineering 215 lectures prepared by Dr. Frantziskonis can be purchased from the Arizona bookstore at the crossing of Park Ave and University Blvd. If you take good class notes and follow everything taught in the class then it is not necessary to purchase this lecture note. Grader: Nilesh Korde [email protected], Ph: 301-7215 Class website: http://u.arizona.edu/~tkundu/course

Topics to be covered:

Stress and Strain: Definitions of normal and shear stress and strain, Hooke’s law

Mechanical behavior of a bar – Deformation of Bar under axial loading

Mechanical behavior of a shaft - Deformation of shaft under torsional loading

Beams – Shear Force and Bending Moment Diagrams, Shear Flow and Built-up Beams

Stress Transformation

Generalized Hooke’s Law and Plane Strain

Spherical and Cylindrical Pressure Vessels

Combined Stresses

Beam Deflections and Statically Indeterminate Beams

Columns – Buckling HOME WORK

Homework is to be done neatly using only one side of a sheet. Homework due date will be announced every time a Homework is assigned. Selected problems of the homework will be graded and returned (grading is done by the Grader). Specific problems of the homework that will be graded will not be announced in advance. Late homework submitted after the cutoff time will not be graded and a grade of zero will be assigned.

Final Exam will be a comprehensive exam on Friday, May 8 (11 am to 1 pm). Times for the two mid term exams will be announced in the class.

GRADING POLICY

Grading will be based on Weekly Homework, two mid term tests and a final exam. Final exam will have 40% weight. Remaining 60% weight will be equally split among the two midterms and the homework.

Assignment of the final grade will be based on the following scale

A 90 - 100 B 80 < 90 C 70 < 80 D 60 < 70 E < 60

Reward for coming to the class and submitting homework on time: Students who come to the class regularly and on time, submit their homework on time will be given the higher grades if their final scores are on the borderline of two grades.

Why Mechanics of Materials?

Knowledge of the Mechanics of Materials is the foundation of engineering design in a number of engineering disciplines, civil engineering, mechanical engineering, mining and geological engineering, aerospace engineering, petroleum and nuclear engineering. It helps engineers to analyze and design a number of every day structures, such as buildings, bridges, electric power transmission towers, cables, machines, airplanes, ships, trains, chains, pencil sharpeners, doors, windows, etc. It also has extensive applications in the oil, gas, nuclear, and chemical industries, including offshore oil platforms, pressure vessels, storage tanks and pipelines.

Engineering and Mechanics of Materials; the inseparable partnership.

Engineers need to be familiar with all phases of a project including:

 specification of the purpose of a new structure  determination of the applied loads (e.g., from design codes, or tests on models or prototypes)  identification of a number of possible solutions (creativity and experience help)  materials selection  Modeling and analysis of possible solutions  comparison of solutions on technical, economic, environmental and aesthetic grounds  optimization of the chosen solution (computers widely used)  construction, testing and commissioning  service and maintenance  decommission (and feedback to help future designers)

Engineers need to be aware of possible failure mechanisms, including:

 failure of ductile materials, in tension, shear or compression  brittle failure  fatigue (caused by repeated applied loading, or vibration)  buckling  failures caused by dynamic loads, such as blast or impact  deterioration due to wear or corrosion  excessive deflection  unacceptable effects on the environment  aesthetic failures

It is surprisingly easy to overlook a possible loading, or possible failure mechanism, without considerable experience. Unfortunately, many spectacular failures have occurred, and continue to occur where engineers overlook a simple factor.

There are many uncertainties in the field of design. The nature and magnitude of loadings applied to a structure cannot always be predicted with great accuracy (e.g., wind loads on a bridge), nor too can the support conditions. Material properties are variable (e.g., concrete) and structural geometry is not known precisely. Engineers must appreciate these uncertainties when selecting appropriate safety factors in design.

What are we going to do and what do we hope to achieve?

In this course, we will use fundamental laws (such as Newton's laws) and concepts to determine the actions of forces on rigid bodies. We will also look inside the structure and examine what are the effects of the applied forces on different parts of the structure. The important goals to be achieved are:

1. An understanding of the behavior of materials under loads. 2. Application of this understanding to analyze and design physical systems. 3. Develop problem-solving procedures

ACADEMIC INTEGRITY One sanction for dishonest academic work permitted under the University CODE OF ACADEMIC INTEGRITY is a failing grade in the course. The grade of E will be assigned for dishonest academic work.