ENGR 246 Mechanics of Materials (3)

Required course for all engineering majors.

Catalog Description:

Stress-strain concepts and relations. Bending, shear, torsion, and deflections. Euler columns, repeated loading and connections. Lecture 3 hours.

Prerequisites:

ENGR104 and ENGR185 with grades of C or better.

Corequisites:

ENGR 247, Mathematics 245.

Textbook/References:

Statics and Mechanics of Materials, E.C. Hibbeler, Prentice Hall, 1993.

Course Objectives: (numbers in brackets indicate the relationship to engineering program outcomes)

Student completing ENGR 246 will know how to:

Derive and plot shear and moment relationships for determinate beams under distributed and concentrated external loads (1, 2).

Apply the concepts of normal stress, shear stress, average stress, and allowable stress to the design of simple connections (1, 2).

Apply mechanical properties of common engineering materials such as Young’s modulus, yield stress, ultimate stress, % elongation at failure, and Poisson’s ratio as well as how to create and interpret a stress-strain diagram. (1, 2).

Derive and apply load-stress and load-deformation relations for axially loaded members, circular shafts, and beams under bending loads (1, 2).

Apply the principle of super position for statically indeterminate axially loaded members.

Determine the state of stress caused by combined external loadings. (1, 2).

Apply the plane stress/strain transformation relations and Mohr’s circle to determine principal stresses/strains and planes and the maximum shear stress/strains (1, 2).

Apply the integration method to determine the slope and deflection of a straight beam under bending loads (1, 2).

Apply Euler’s solution to predict the elastic buckling of columns. (1, 2).

Class/Laboratory Schedule:

Lecture meets 3 times per week for 50 minutes or two times per week for 75 minutes.

Topics Covered:

Week Topic

1-3 Stress and Strain, Mechanical Properties (1,2)

4-6 Axial Load and Torsion (1,2)

7-9 Bending and Transverse Shear (1,2)

10-12 Combined Loadings, Stress/Strain Transformation (1,2)

13-15 Column buckling, Elastic deformation of beams (1,2)

Contribution to Professional Component:

Contributes toward the 1.5 years of engineering topics as a 1 credit hour course in engineering sciences.

Relationship of course to program outcomes

This course supports engineering outcomes 1 and 2.

Prepared by: Dr. Ron Goulet, 04/11/03