Universidad de Jaén

Block I. Fundamentals of machine designing

1. Introduction to Design

1.1 Design engineering

1.1.1 Stages of the design process

1.1.2 Design Considerations

1.2 Considerations of stress, strength and safety factor

1.3 Reliability. Safety and reliability

1.4 Economic factors in the design

1.5 Units Systems

 

Item 2. Materials for building machines

2.1 Mechanical properties of materials

2.1.1 Stress test. Static strengh

2.1.2. Elasticity and plasticity

2.1.3 Hardness

2.1.4 Fragility and ductility

2.1.5 Effect of temperature

2.1.6 Stress concentration

2.2 Materials more commonly used for the construction of
        machines

2.2.1 Casting

2.2.2 Steel. Heat treatments. Cold work

2.2.3 Alloy and stainless steels

2.2.4 Light materials

2.2.5 Other materials

 

Item 3. Analysis of stress and strain

3.1 Stress and Strain

3.1.1 Stress and axial deformation. Hooke's Law

3.1.2 Shear strain

3.1.3 Multiaxial stress states. Generalized Hooke's law

Transformations stress 3.2

3.2.1 Mohr Circle for plane stress

3.2.2 Application of the three-dimensional Mohr circle analysis

          efforts

3.3 Bending and torsional

3.3.1 General theory of bending. Bending moment and normal stress

3.3.2 Bending beams. Shear beams

3.3.3 General Theory of torque. Torque and shear stress

3.4 Tension machine elements

3.4.1 Concentration of effort

3.4.2 Flexion in curved beams

3.4.3 Tensions in forced settings and rotating rings

3.4.4 Tensions Contact

3.5 Deformation machine elements

3.5.1 Strain axial load, torsion and bending

3.5.2 Method area of  momentum

3.5.3 Strain Energy

3.5.4 Theorem Castigliano

3.5.5 Capacity to absorb energy

3.6 Elements subjected to compression

3.6.1 Elements under compression. Columns and struts

3.6.2 Elements subjected to short and focused compression       Eccentric

3.6.3 Slender elements under compression centered

3.6.4 Slender members subjected to eccentric compression

 

Block II.  Failure conditions in elements


  Item 4. Static considerations in the design of machine elements

4.1 Design for static strength

4.1.1 Concentration of stress to static load

4.1.2 Static criteria failure

4.1.3 Failure ductile and brittle materials. Notch sensitivity

4.2 Static Fracture

4.2.1 ductile fracture and brittle fracture

4.2.2 Factor intensification of effort. Fracture toughness

4.2.3 Fracture modes

 

Item 5. Dynamic considerations for mechanical design

5.1 Design for fatigue resistance against alternating loads

5.1.1 S-N diagram. Fatigue strength and fatigue limit

5.1.2 Correction fatigue limit. Factors Marin

5.2 Design resistance to fatigue by fluctuating loads

5.2.1 Influence of the average voltage. Fatigue failure theories

5.2.2 Alternative stress equivalency

5.2.3 Load line. Safety factors

5.2.4 Combined loads fluctuating. If brittle materials

5.2.5 Surface Fatigue

5.3 Accumulated fatigue damage

5.3.1 S-N diagram for damaged materials. Miner and  Manson laws
       

5.3.2 Damage caused by average load states

5.3.3 Correction fatigue limit of damaged materials.

5.3.4 Crack propagation under cyclic loading

 B lock III. Design of machine elements

Item 6. Drive shafts

Item 7. Mechanical springs

Item 8. Rolling bearings

Item 9. Joins

Item 10. Gears

The course will be developed through:

Lectures (M1 - Lectures, M2 - Exhibition of theory and general examples and M3 - introductory and troubleshooting activities). The basic concepts of the subject will be presented through multimedia presentations, theoretical presentations, and implementation examples. With a total of 45 contact hours and autonomous work by the student estimated 67.5 horas.En these classes specific skills CEM2, CEM4 and CEM9 well as CB2, CB3, CB5 and CT2 general be developed

Practices (M11 - Solving exercises, M9 - Laboratories). Some content will be explored through activities involving the practical application of knowledge. It will employ a total of 10.0 contact hours and autonomous work by the student estimated 15.0 hours. In these classes CEM2 specific skills will be developed, and CEM9 and general CT2 CT4 CT6 CB4 and CB5 for which the student must submit the document of the corresponding work. Specifically there will be 5 laboratory practices as well as practical classes of exercises in which students will participate actively in the planning and development of them.

Group tutorials (M17 - Clarification of doubts). This activity is organized by short seminars where problems will deepen in some of the topics covered in lectures and doubts resolved alumnos.Con It also aims at strengthening the skills and CT2 CEM2

Seminars (M15 - Seminar). One seminar of some similar themes to the context in which the subject is developed will be organized. This is intended to strengthen the powers CEM2 and CT2

Students with special educational needs should contact the Student Attention Service (Servicio de Atención y Ayudas al Estudiante) in order to receive the appropriate academic support

As host of evaluation of the course, an exam (80% of the final grade for the course) will be held to assess the skills CT2 CEM2 CB2 and CB3 CEM4 CEM9 CT6. However, in order to boost the ongoing workload and deprive the review has taken into account other evaluation criteria such as attendance and participation in class, reports of laboratory practice and delivery of activities proposed by the teacher, the latter two important processes to assess the skills CT4
CEM2 CT2 and CT6 CB4 CB5 CEM9. Thus the ability to transmit information and self-employment always related to the subject is reinforced.

With regard to the examination, it is necessary that students acquire a minimum score of five points over ten to pass the course and take into account the practice califications.

Regarding the practices, to pass the subject is necessary to add that it is compulsory to attend all practices. Also delivering memories practices ( in the stipulated time for it) is absolutely mandatory. In addition, you should obtain an average mark of 5 or higher on the deliverables of them. Additionally, it may not be less than 3.5 in some practice to consider average.

In case of force majeure which do not allow to attend to practices or laboratory clase, it is neccesary to pass a special examination in which the student must demonstrate sufficient skills to develop the practice work. This option should be requested one month before the official exam.