MACHINE DESIGN FUNDAMENTALS

Ingegneria Gestionale MACHINE DESIGN FUNDAMENTALS

0612600034
DIPARTIMENTO DI INGEGNERIA INDUSTRIALE
EQF6
INDUSTRIAL ENGINEERING AND MANAGEMENT
2022/2023

OBBLIGATORIO
YEAR OF COURSE 3
YEAR OF DIDACTIC SYSTEM 2018
SPRING SEMESTER
CFUHOURSACTIVITY
660LESSONS
Objectives
KNOWLEDGE AND UNDERSTANDING:
FUNDAMENTAL PRINCIPLES OF OPERATING, KINEMATIC AND DESIGN OF SIMPLE MECHANICAL OR STRUCTURAL ELEMENT; MATERIALS BEHAVIOUR, STARTING FROM THE DEFINITIONS OF STRESS, STRAIN AND THEIR RELATIONSHIP; EQUILIBRIUM EQUATIONS OF ELASTICITY; BEAM THEORY AND ASSESSMENT OF INTERNAL FORCES AND DEFORMATIONS; MODELLING THE MECHANICAL STRUCTURE AS A BEAM OR AS A COMBINATION OF BEAMS CONNECTED BY NODES; DESIGN AND VERIFICATION PROCEDURE OF SIMPLE ELEMENTS OR GROUPS THAT MAY BE RELATED TO EQUIPMENT OR MECHANICAL ELEMENTS SUBJECTED TO DIFFERENT FORCES AND CONSTRAINTS, DEPENDING ON GEOMETRY, BOUNDARY CONDITIONS AND MATERIAL LAW.

APPLYING KNOWLEDGE AND UNDERSTANDING ENGINEERING ANALYSIS
THE STUDENT WILL BE ABLE TO DEAL WITH THE ANALYSES OF KINEMATIC BEHAVIOUR AND STRENGTH PREDICTION OF SIMPLE MECHANICAL ELEMENTS; MOREOVER, ABLE TO IDENTIFY THE MOST APPROPRIATE METHOD FOR PERFORMING A STRESS-STRAIN ANALYSIS IN ORDER TO DESIGN SIMPLE MECHANICAL COMPONENTS, OPTIMIZING THE CALCULATION PROCESS BASED ON THE STARTING DATA AND THE BOUNDARY CONDITIONS.

APPLYING KNOWLEDGE AND UNDERSTANDING ENGINEERING DESIGN
DESIGN AND VERIFICATION OF SIMPLE ELEMENTS OR SYSTEMS RELATED TO EQUIPMENT OR MECHANICAL ASSEMBLIES SUBJECTED TO DIFFERENT FORCES AND CONSTRAINTS, DEPENDING ON GEOMETRY, BOUNDARY CONDITIONS AND MATERIAL LAW.

MAKING JUDGMENTS - ENGINEERING PRACTICE:
BY THE END OF THE COURSE, THE STUDENT WILL BE ABLE TO APPLY THE PROPER CALCULATION SCHEMES TO A GIVEN MECHANICAL PROBLEM. ABILITY TO EVALUATE THE STATIC BEHAVIOUR OF A SIMPLE STRUCTURE.

COMMUNICATION SKILLS TRANSVERSAL SKILLS:
UNDERSTANDING THE NOMENCLATURE AND DEFINITIONS RELATING TO THE FIELDS OF STRENGTH OF MATERIALS AND MECHANICS OF DEFORMABLE BODIES; ABILITY TO EXPLAIN THE CHOSEN CALCULATION APPROACH.

LEARNING SKILLS TRANSVERSAL SKILLS
APPLICATION OF THE ACQUIRED KNOWLEDGE IN CONTEXTS DIFFERENT FROM THOSE PRESENTED DURING THE COURSE.

INVESTIGATION SKILLS TRANSVERSAL SKILLS
ABILITY IN DEVELOPING SIMPLIFIED SCHEMES TO SOLVE COMPLEX PROBLEMS AUTONOMOUSLY.
Prerequisites
PREREQUISITES: GENERAL TECHNOLOGIES OF MATERIALS, MECHANICAL DRAWING, APPLIED MECHANICS
Contents
FUNDAMENTALS: THE STRUCTURAL MECHANICS AND THE PRINCIPLES OF THE MECHANICS - VECTORIAL CALCULUS FOR THE MECHANICAL ENTITIES - CONSERVATIVE AND NON-CONSERVATIVE LOADS.
THEORY (3 HOURS), PRACTICE (3 HOURS).

THE CONTINUOUS DEFORMABLE SOLID - TYPES OF EXTERNAL LOADS - DEGREE OF FREEDOM, GLOBAL AND LOCAL - STATIC CHARACTERIZATION OF ELEMENTS AND STRUCTURES.
THEORY (3 HOURS), PRACTICE (3 HOURS).

RELATED ANALYSIS FOR STRAIN AND STRESS/ YELD CRITERIA - RELATED ANALYSIS FOR STRAIN AND DISPLACEMENTS UNDER INFINITESIMAL STRAINS - STRESS TENSORIAL
FIELD ANALYSIS - INDEFINITE AND BOUNDARY EQUILIBRIUM EQUATIONS - HOOKE LAW FOR ISOTROPIC MATERIALS - SUPERPOSITION OF THE EFFECTS - NON LINEAR ANALYSIS -
DUCTILITY AND BRITTLENESS - YELD CRITERIA AND EQUIVALENT NORMAL STRESS - SAFETY ANALYSIS AND SAFETY FACTOR-
THEORY (10 HOURS), PRACTICE (8 HOURS).

STRUCTURAL BEHAVIOUR OF THE BEAM AND ITS APPLICATIONS - GEOMETRY OF AREAS, PARAMETERS AND RELATIONS - DE SAINT VÉNANT BEAM THEORY - STRESS RESULTANTS -
AXIAL LOAD AND STRAIN/STRESS EFFECTS - SIMPLE BENDING, SKEWED OR NOT, WITH RELATED STRAIN/STRESS LAWS - BENDING TRANSVERSAL DEFLECTIONS - ECCENTRIC AXIAL NORMAL LOAD - SHEAR (WITH BENDING) AND ITS EFFECTS - THE TORQUE: SOLUTIONS FOR DIFFERENT SHAPES OF THE NORMAL SECTION, ALSO TUBULAR OR NOT - COUPLEMENT SHEAR/BENDING/TORQUE AND SHEAR CENTER - PROPORTIONING OF AXLES AND SHAFTS - EULERIAN INSTABILITY OF BEAMS AND OMEGA METHOD.
THEORY (12 HOURS), PRACTICE (12 HOURS).

2D AND 3D STRUCTURAL PROBLEMS - AXISYMMETRICAL THIN SHELLS AND MEMBRANE STRESSES - PIPELINES AND VESSELS.
THEORY (3 HOURS), PRACTICE (3 HOURS).

LABORATORY: GUIDED VISIT TO THE MACHINE DESIGN LABORATORY AND PARTECIPATION TO MECHANICAL TESTS.
(2 HOURS)
Teaching Methods
THE COURSE CONSIDERS THEORETICAL LECTURES AND NUMERICAL APPLICATIONS DEVELOPED IN THE CLASSROOM, INTEGRATED BY SOME LABORATORY TESTS.
Verification of learning
ACHIEVEMENT OF THE PREFIXED AIMS IS EVALUATED BY WAY OF WRITTEN AND ORAL EXAMINATION.
WRITTEN EXAMINATION.
CRITERIUM FOR MINIMUM THRESHOLD
THE STUDENT HAS TO PROVE THAT HE KNOWS HOW TO SOLVE FOR DETERMINING BOUNDARY CONSTRAINTS AND STRESS RESULTANT DIAGRAMS.
CRITERIUM FOR EXCELLENCE.
THE STUDENT SHOWS A SURE DIMENSIONING OF A SIMPLE STRUCTURE HIGHLIGTHING GOOD KNOWLEDGE OF THE EMPLOYED FORMULAS.
ORAL EXAMINATION.
CRITERIUM FOR MINIMUM THRESHOLD
THE STUDENT HAS TO PROVE THE GOOD KNOWLEDGE OF THE FORMULATIONS CONNECTED TO THE STRESS RESULTANTS, REPRESENTING THEM FOR PLANAR BEAM STRUCTURES, KNOWING THE APPLICATION OF A STRNGTH CRITERIUM TO A GENERAL STRESS TENSOR, KNOWING HOOKE'S LAW.
CRITERIUM OF EXELLENCE
IN ADDITION TO THE ABOVE, THE STUDENT HAS TO SHOW THE THEORETICAL DEVELOPMENT OF THE FORMULAS RELATED TO THE STRESS RESULTANTS, DETERMINING PRINCIPAL STRESSES AND MAXIMUM TANGENTIAL STRESSSES, USING DIFFERNT STRENTH CITERIA, EVALUATING MEMBRANAL STRESSES FOR VESSELS, DEVELOPING FATIGUE CALCULATIONS.
THE WRITTEN EXAMINATION ONCE PASSED WILL BE CONSIDERED VALID FOR THE ENTIRE EXAMINATION SESSION (SUMMER, AUTUMN AND EXTRAORDINARY) IN WHICH IT WAS TAKEN. IF THE STUDENT DOES NOT ATTEND THE ORAL EXAMINATION IN THE RELEVANT EXAMINATION SESSION, THE WRITTEN EXAMINATION WILL NO LONGER BE CONSIDERED VALID AND THE STUDENT WILL HAVE TO TAKE ANOTHER ONE. ONCE PASSED, THE WRITTEN EXAMINATION WILL BE THE SUBJECT OF AN INTERVIEW DURING THE ORAL EXAMINATION.
DURING THE COURSE IT CAN BE TAKEN TWO PARTIAL WRITTEN TESTS, RESPECTIVELY AFTER HALF OF COURSE AND AT THE END OF THE SEMESTER. EACH TEST WILL WEIGH 50% OF THE TOTAL GRADE.  IF THE GRADE WILL BE HIGHER THAN 18/30 THE STUDENT MAY CONSIDER HIMSELF EXEMPT FROM THE WRITTEN TEST. THE EXEMPTION WILL ONLY APPLY TO THE EXAMINATION SESSION FOLLOWING THE TEACHING SESSION. 
THE FINAL GRADE, EXPRESSED IN THIRTIETHS WITH POSSIBLE PRAISE, WILL DEPEND ON THE OVERALL MATURITY ACQUIRED ON THE CONTENTS OF THE COURSE.
Texts
- NOTES FROM THE LECTURES;
- AURELIO SOMA', FONDAMENTI DI MECCANICA STRUTTURALE, EDIZIONI QUINE.
- GIULIO BELLONI, ANTONIETTA LO CONTE, COSTRUZIONE DI MACCHINE, EDITORE ULRICO HOEPLI, MILANO.
- MANUALE DELL'INGEGNERE MECCANICO, EDITORE ULRICO HOEPLI, MILANO
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