MACHINE DESIGN FUNDAMENTALS

Ingegneria Gestionale MACHINE DESIGN FUNDAMENTALS

0612600034
DIPARTIMENTO DI INGEGNERIA INDUSTRIALE
EQF6
INDUSTRIAL ENGINEERING AND MANAGEMENT
2020/2021

OBBLIGATORIO
YEAR OF COURSE 3
YEAR OF DIDACTIC SYSTEM 2018
SECONDO SEMESTRE
CFUHOURSACTIVITY
660LESSONS
Objectives
KNOWLEDGE AND COMPREHENSION
BASIC PRINCIPLES FOR FUNCTIONALITY AND DIMENSIONING OF SIMPLE MECHANICAL OR STRUCTURAL ELEMENTS; MECHANICS OF CONTINUOUS DEFORMABLE SOLID; DISPLACEMENT, STRAIN, STRESS ANALYSES; LINEAR ELASTICITY; INDEFINITE AND BOUNDARY EQUILIBRIUM EQUATIONS; BEAM THEORY AND EVALUATION OF STRAINS AND STRESSES; MODELS OF MECHANISM FORMED BY ASSEMBLED BEAMS; DIMENSIONING AND CHECK OF INTEGRITY APPROACHS FOR SIMPLE ELEMENTS OR GROUPS RELATED TO MECHANICAL DEVICES OR ELEMENTS SUBJECTED TO DIFFERENT LOAD VECTORS AND CONSTRAINTS DEPENDING ON GEOMETRY, BOUNDARY CONDITIONS AND MATERIAL PROPERTIES; STRESS CONCENTRATION
FACTORS FOR 2D AND 3D ELEMENTS; MEMBRANE STRESSES IN THIN SHELLS; STRUCTURAL INTEGRITY, STRUCTURAL STIFFNESS, METAL FATIGUE, EULERIAN INSTABILITY OF BEAMS.
KNOWLEDGE AND APPLIED CAPABILITY OF COMPREHENSION - ENGINEERING ANALYSIS
TO KNOW ANALYSING KYNEMATIC BEHAVIOUR AND STRENGTH OF SIMPLE MECHANICAL ELEMENTS; TO KNOW CHOOSING THE BETTER METHODS FOR STRAIN AND STRESS ANALYSIS TO THE AIM OF DIMENSIONING SIMPLE MECHANICAL COMPONENTS, OPTIMIZING THE EVALUATION PROCESS ON THE BASIS OF THE INITIAL DATA AND THE ACTUAL CONTEST.
KNOWLEDGE AND APPLIED CAPABILITY OF COMPREHENSION - ENGINEERING DESIGN
DIMENSIONING AND STRUCTURAL ANALYSIS OF SIMPLE ELEMENTS OR GROUPS RELATED TO MECHANICAL DEVICES OR COMPONENTS SUBJECTED TO DIFFERENT LOADS AND
CONSTRAINTS DEPENDING ON GEOMETRY, BOUNDARY CONDITIONS AND MATERIAL PROPERTIES.
AUTONOMY OF JUDGMENT - ENGINEERING APPLICATION CAPABILITY OF APPLYING RIGHT EVALUATION MODELS FOR A GIVEN MECHANICAL PROBLEM. CAPABILITY OF STATING THE STATIC CONDITIONS OF SIMPLE STRUCTURES.
TRANSVERSAL CAPABILITIES - LEARNING CAPABILITIES COMPREHENSION OF TERMS AND DEFINITIONS RELATED TO MATERIAL STRENGTH AND DEFORMABLE BODIES STATIC; CAPABILITY OF EXPLAINING THE USED EVALUATION APPROACH.
TRANSVERSAL CAPABILITIES - INVESTIGATION CAPABILITIES KNOWING TO APPLY THE ACQUIRED KNOWLEDGES ALSO TO CONTESTS DIFFERENT FROM THOSE STUDIED IN THE COURSE.
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 - 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 (8 HOURS).

2D AND 3D STRUCTURAL PROBLEMS - KIRSCH PLATE SOLUTION - STRESS CONCENTRATION FACTORS FOR MANY CASES - FATIGUE FOR METALLIC ELEMENTS - AXISYMMETRICAL THIN

SHELLS AND MEMBRANE STRESSES - PIPELINES AND VESSELS.
THEORY (10 HOURS), PRACTICE (4 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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