Estudia

• CT13 Analitzar les implicacions ètiques de les actuacions professionals
• CT15 Utilitzar la llengua anglesa
• CE21 Coneixements i capacitats per al càlcul, disseny i assaig de màquines.

1. Introduction to mechanical design.

          1.1. Mechanical elements description.

          1.2. The design process.

2. Component loading.

          2.1. Free Body Diagrams.

          2.2. Loading on a section.

          2.3. Stress distribution.

          2.4. Critical points in a section.

          2.5. Stress concentration.

          2.6. Bending of curved beams.

          2.7. Contact stresses.

          2.8. Multiaxial states of stress and strain.

3. Theories of failure.

          3.1. Materials strength.

          3.2. Modified Coulomb-Mohr theory.

          3.3. Von Mises theory.

          3.4. Cyclic stress and fatigue.

          3.5. Safety factor.

4. Transmission design.

          4.1. Shaft design.

          4.2. Bearing selection.

          4.3. Gear design.

• Budynas, Richard G (cop. 2011 ). Shigleys's mechanical engineering design (9th ed.). New York: McGraw Hill. Catàleg
• Collins, Jack A (cop. 2003 ). Mechanical design of machine elements and machines : a failure prevention perspective . New York [etc.]: John Wiley & Sons. Catàleg
• Dimarogonas, Andrew D (cop. 2001 ). Machine design : a CAD Approach . New York [etc.]: John Wiley & sons. Catàleg
• Fogiel, M. (cop. 1988 ). The Machine design problem solver . Piscataway, New Jersey: Research and Education Association. Catàleg
• Norton, Robert L (cop. 2011 ). Machine design : an integrated approach (4th ed.). Boston: Pearson. Catàleg

Activitats d'avaluació:

The evaluation involves several activities:
1) Lab/computer sessions and continuous assessment (LCA): The students will work in teams inside the lab groups. Reports and exercices have to be delivered at the professor request. The team must have the report and the exercices completed in the prescribed dates (usually the next session), otherwise they’ll get a 0 grade for that task. It is necessary to participate in all the lab/computer sessions and also present all the reports/exercices. The team is responsible to keep a folder with all this content available at each session. The grade is collective, but the professor can decide to give different marks if the performance of one member of the group is low.
2) A project (PRO) consisting of the recalculation of an existing mechanical element. This task will also be done in the same lab teams. Everybody is responsible for the group and care will be taken to detect and penalise non collaborative members. This activity will involve some presentations before the professor in a tutorial session. It is not allowed to present the reports after the date prescribed by the professor.
3) Approximately at midterm there will be an examination (PAC) consisting of an exercise of an element similar to the ones that can appear in the final examination. The exercise will ask the student to do an analysis with the knowledge acquired up to date.
4) In order to keep pace with the course, the student is expected to attend all lectures and exercise sessions in the weekly schedule. Daily (or sampling) controls will be done.
5) There will be only one final exam (FE).

The final grade (FG) will consist of two elements: the exam result (EX) and the continuous assessment (CA).

The following algorithm will be used to establish the grade:

EX = biggest of ((FE*0,5+PAC*0,1/0,6) or FE)

if FE >= 4 then

CA = (LCA+PRO)/2
FG = biggest of ((EX*0,6+CA*0,4 or EX)

else

FG = FE

Also, if the student has an attendance below 75% of the classroom sessions, does not attend the PAC, does not attend any of the lab sessions or does not deliver the PRO or any of the LCA, he/she will get a grade FG = FE.

Cheating in any of the evaluation activities is strongly advised against. If detected, it will imply a fail grade plus the corresponding academic sanctions.

Criteris específics de la nota «No Presentat»:
The student will get a "No Presentat (NP)" grade if he/she doesn't sit at any of the final exams and doesn't participate in any of the continuous assessment activities or abandons them before November 1th.

Lab/Computer room sessions:
Two of the sessions will be done with the ANSYS software in a computer room of the School.

Session description:

1- Extensometry: Bending, stress concentration, curved beam.
2- Extensometry: Impact loading.
3- ANSYS: Introduction, basic 2D models.
4- ANSYS: 3D models.
5- Power transmission: Gear box.

• Elasticitat i resistència de materials
• Fonaments de ciència de materials
• Fonaments de mecànica
• Teoria de màquines