Course code Meha2004

Credit points 3

Total Hours in Course81

Number of hours for lectures16

Number of hours for seminars and practical classes8

Number of hours for laboratory classes8

Independent study hours49

Date of course confirmation13.12.2016

Responsible UnitInstitute of Mechanics and Design

prof.
## Aivars Kaķītis

Dr. sc. ing.

Ph.D.

Students will acquire knowledge on durability, stiffness and stability of materials for calculation of constructions a, develop engineering perception, supporting on the theory they study to put into practice the substantiation of optimal structural design of construction and machines.

Knowledge - students comprehend the basic principles of engineering calculation on strength, stability and deformation of materials and constructions. Assessment – interactive tests and two classroom tests.

Skills - using the methods and modes of the strength of materials students are able to perform practical calculations on strength, stability and deformation of engineering constructions. Assessment – 2 lab works.

Competence - students are able to solve technical problems and perform independent calculation and construction work of engineering constructions design. Assessment – 3 homeworks

**Full time intramural studies:**

1. Introduction. Equivalent and balanced systems of forces. Supports and reactions. (Lectures – 2h, practical work – 1h). Interactive test.

2. Geometric parameters of cross section. (Lecture – 1h, practical work – 1h).

3. Method of cross section. Diagrams of internal forces. (Lecture – 1h, practical work – 1h).

4. Stresses. Tension, Diagram of stress-strain for plastic and brittle materials. (Lectures – 2h, practical work – 1h). Interactive test.

5. Surface load. Permissible stress. (Lecture – 1h).

6. Stresses in tension. (Lecture – 1h, Labwork - 4 h). Homework, Classroom test.

7. Shearing load. (Lecture – 1h, practical work – 1h).

8. Torsion load. Torsion in round bars. (Lectures – 2h, practical work – 1h), Homework, Classroom test.

9. Bending load. Normal stress in bending. (Lecture – 1h, Labwork 4h). Interactive test.

10. Tangential stress in bending. Calculation of strength. (Lectures – 2h, practical work – 1h), Homework, Classroom test.

11. Theories of strength. (Lectures – 2h, practical work – 1h).

**Part time extramural studies:**

All topics specified for full time studies are accomplished, but the number of contact hours is one half of the number specified in the calendar

Course assessment with a mark is formed follows:

• all laboratory work must be completed (20%)

• all homework must be submitted and successfully graded (30%)

• all interactive tests must be submitted and successfully graded (20%)

• two classroom tests must be written and successfully graded (30%).

The problems for independent work are similar to the ones given during practice work. The problem starts with statement of initial parameters. To solve the problem, application of the skills obtained during practice is necessary.

The test with a mark is formed as the weighted mean of the results of interactive tests, homeworks, lab works and classroom tests.

Meriam J.L., Kraige L.G. Engineering Mechanics. Statics. New York: John Wiley & Sons, 2001. 512 p.

Meriam J.L., Kraige L.G. Engineering Mechanics. Dynamics. New York: John Wiley & Sons, 2003. 744 p.

Hibbeler R.C. Statics and mechanics of materials. Singapore: Prentice Hall, 2004. 792 p.

Compulsory course for students of the second-level professional higher education study program "Design and Craft"