Polytechnic University of Puerto Rico
Department of Civil and Environmental Engineering
ENGI 3110 – Mechanics of Materials I
Three credit-hours. Two two-hour lecture periods per week.
Pre-requisites:
ENGI 1130 and ENGI 2110
Course Description: Introduction to the mechanics of deformable bodies. Study and analysis of
stresses and strains on connections and bar elements subjected to axial,
torsional, and transverse loads. Internal forces as stress resultants; shear
force and bending moment diagrams. Design of connections and structural
members. Transformation of stresses, Mohr´s Circle.
Textbook:
Hibbeler, R.C., Mechanics of Materials, 8th Ed., Prentice-Hall, 2011
Professor:
Dr. Alberto Guzmán
Office hours: 4:00-4:30 PM
Office:
L-153
Phone:
787-622-8000 ext. 218
E-mail:
aguzman@pupr.edu
Course Objectives
1. Understand the methods to determine internal forces, and the relationship between load,
shear force and bending moment in beams.
2. Understand the concepts of normal stress, shear stress, normal strain and shear strain.
3. Understand the relations between stress and strain for wide variety of conditions and
materials.
4. Understand of the relations between the loads applied to a non-rigid body made of a given
material and the resulting stresses and deformations of the body.
5. Know adequate procedures for finding the required dimensions of a member of a specified
material to carry a given load subject to stated specifications of stress.
6. Determine the internal forces in bars subjected to axial, torsional or transverse loading; draw
shear force and bending moment diagrams.
7. Identify the stresses that will be generated on cross sections of bar elements subjected to
different load conditions.
8. Determine stresses and strains on connections and bar elements subjected to axial, torsional,
and transverse loads.
9. Design simple connections, axially loaded bars, shafts, and beams.
10. Apply Mohr’s Circle to simple stress states, to determine p