Strength of Structures
ECTS credits: 4
Gaining fundamental knowledge of the strength of structures and dimensioning of simple structural elements in the exploitation of motor vehicles and aircraft.
Introduction to the strength of structures. Definitions and basic terms. Load classification. Models of structural elements. Stresses, internal forces and moments. Basic hypotheses, problems and tasks of the strength of structures. Normal stress, rod deformation, Hooke’s law. Statically indefinite cases of rod load, initial and thermal stresses. Stresses in a circular ring. Energy of elastic rod deformation. Shear, deformations and stresses, problem-solving. Multiaxial stress, Mohr's circle. Beam strength, internal forces and bending moment. Drawing of N, Q and M diagrams. Stresses in a beam transverse section. Axial moments of surface. Deflection of a bending beam. Statically indefinite beams. Beams of variable transverse section. Biaxial bending of beams. Beam dimensioning. Shaft strength, deformations and stresses. Torsion of rods of various transverse sections. Polar moments of surface. Torsion and bending. Problem-solving of shaft strength. Rod buckling, joint-supported rod, rods with various supports. Criteria of dimensioning structural elements. Fundamental theories of strength. Coefficients of safety and allowable stress. Stress concentration. Resonance. Analysis of various dimensioning criteria.
Individual solving of technical problems relevant to the strength of structural elements.
Having passed the exam, the student will be able to: 1. Define the mechanical and mathematical models of a real problem while dimensioning structural elements. 2. Dimension statically determinate beams with respect to the allowable stress and deflection. 3. Calculate the minimum diameter of the shaft with respect to the allowable stress and the angle of twist. 4. Dimension a pressure loaded rod without losing stability. 5. Calculate maximum stresses in simple cases of stress concentration. These learning outcomes contribute to the following outcomes of the study programme of aircraft maintenance: • 3-Classify the levels of maintenance according to the impact on safety and costs of ordinary and extraordinary maintenance. • 5-Distinguish aircraft maintenance according to MSG-2 and MSG-3 concepts. • 6-Distinguish single parts of an aircraft in relation to the physical laws of flying and functioning of aircraft systems. • 10-Solve problems in the field of mechanics, thermodynamics, electrical engineering, aerodynamics and fluid mechanics, relating to aircraft operations. These learning outcomes contribute to the following outcomes of the professional study programme of Motor Vehicle Maintenance: - Explain the physical parameters of motor vehicle construction. - Analyse the properties and performance of motor vehicles. - Analyse the causes and effects of vehicle malfunctions.