MACHINE DESIGN AND FINITE ELEMENT METHOD

Roberto Guglielmo CITARELLA MACHINE DESIGN AND FINITE ELEMENT METHOD

0622300018
DIPARTIMENTO DI INGEGNERIA INDUSTRIALE
EQF7
MECHANICAL ENGINEERING
2018/2019

OBBLIGATORIO
YEAR OF COURSE 1
YEAR OF DIDACTIC SYSTEM 2018
SECONDO SEMESTRE
CFUHOURSACTIVITY
990LESSONS
Objectives
THE MAIN OBJECTIVE OF THE COURSE IS TO ACQUIRE A GOOD THEORETICAL KNOWLEDGE OF SOME NON-ELEMENTARY METHODOLOGIES IN MECHANICAL DESIGN FIELD. STARTING FROM THE BASIC NOTIONS OF THE CONTINUUM MECHANICS, BRIEFLY RECALLED AT THE BEGINNING OF THE COURSE, THE STUDENT WILL LEARN METHODS AND CRITERIA OF THE ADVANCED DESIGN, INVOLVING THE MECHANICS OF STATIC FRACTURE, PROPAGATION OF FATIGUE CRACKS, PLASTICITY AND CREEP. IN ADDITION, THE STUDENT WILL LEARN THE BASIC CONCEPTS OF THE FINITE ELEMENTS METHOD AT A LEVEL HIGH ENOUGH TO SOLVE SIMPLE LINEAR STATIC PROBLEMS BY PRODUCING ITSELF THE NECESSARY CODE.

THE STUDENT SHOULD BE ABLE TO PRODUCE REALISTIC STRUCTURAL CALCULATIONS AND PLAUSIBLE DESIGN EVALUATIONS BASED ON THE THEORETICAL ARGUMENTS DEVELOPED DURING THE COURSE.

AUTONOMY IN JUDGEMENT IS ENCOURAGED IN THE PREPARATION PHASE FOR THE FINAL EXAMINATION. IN FACT, THIS INVOLVES THE DISCUSSION OF A CALCULATION REPORT, PREPARED BY THE STUDENTS, IN WHICH THEY MAY USE, IN THEIR JUDGMENT, TECHNICAL STANDARDS, MANUALS, AND SOFTWARE.

AN IMPORTANT PART OF THE COURSE IS THE PRODUCTION OF A SIMPLE CALCULATION CODE FOR FINITE ELEMENTS. THIS ACTIVITY, THAT IS ORGANIZED FOR GROUPS OF 2-4 STUDENTS, INDUCES THEM TO COMMUNICATE EFFICIENTLY IN ORDER TO SOLVE THE VERY SPECIFIC PROBLEMS OF PROGRAMMING OR MORE GENERAL OF THE DESIGN OF THE CALCULATION MODELS.
Prerequisites
IT IS REQUIRED A KNOWLEDGE LEVEL EQUIVALENT TO WHAT DELIVERED IN THE THREE-YEAR UNDERGRADUATE DEGREE IN MECHANICAL ENGINEERING IN THE FOLLOWING TOPICS: MATHEMATICS, PHYSICS, MECHANICAL DESIGN, STRENGTH OF MATERIALS, MACHINE DESIGN, SOFTWARE PROGRAMMING.
Contents
MECHANICAL OF DEFORMABLE CONTINUOUS (4H).
LINEAR ELASTIC FRACTURE MECHANICS: STRESS INTENSITY FACTOR, ENERGY RELEASE RATE, PLASTIC ZONE, DESIGN CRITERIA WITH DAMAGE TOLERANCE CONCEPTS (12H).
BASIC THEORY OF PLASTICITY AND APPLICATIONS WITH SIMPLE STRESS REDISTRIBUTION PROBLEMS (10H).
J-INTEGRAL AND MECHANIC OF THE ELASTO-PLASTIC FRACTURE (12H).
FATIGUE CRACK PROPAGATION: CUMULATIVE DAMAGE, RETARDATION MODELS (6H).
VISCOELASTICITY: LINEAR MODELS, NONLINEAR MODELS, TERTIARY STAGE MODELING BY CONTINUUM DAMAGE (8H).
FINITE ELEMENT METHOD (GENERAL THEORY) (8H).
SIMPLE ELEMENTS: ROD, BEAM, TRIANGULAR PLANE, ISOPARAMETRIC QUADRILATERAL (12H).
PRODUCTION OF SIMPLE CALCULATION SOFTWARE TO SOLVE STATIC PROBLEMS OF RETICULAR STRUCTURES, BEAM ASSEMBLIES, SIMPLE PLANE PROBLEMS, CALCULATION OF FRACTURE MECHANICS PARAMETERS, THERMOELASTICITY PROBLEMS (18H).
Teaching Methods
FRONTAL LECTURES FOLLOWED BY EXERCISES FOR EACH THEORETICAL TOPIC.
CREATING WORKGROUPS FOR WRITING SOFTWARE FOR FEM APPLICATIONS.
ASSIGNMENT SIMPLE PROBLEMS TO ENCOURAGE AUTONOMOUS SOLUTION DEVELOPMENT.
ASSIGNMENT OF DESIGN PROBLEMS TO BE DISCUSSED AT THE FINAL EXAM.
Verification of learning
VALIDATION IN CLASSROOM OF THE PROBLEMS ASSIGNED.
ORAL EXAMINATION IN WHICH:
- THE KNOWLEDGE OF THEORY AND THE ABILITY TO APPLY IT TO NEW PROBLEMS OCCUR.
- THE DESIGN REPORT IS DISCUSSED AND THE OPERATION OF THE FEM SOFTWARE.
Texts
G. CRICRÌ - ELEMENTI DI MECCANICA DELLA FRATTURA
T. L. ANDERSON - FRACTURE MECHANICS: FUNDAMENTALS AND APPLICATIONS
BELLONI, LO CONTE - COSTRUZIONE DI MACCHINE
C. A. FELIPPA - INTRODUCTION TO FINITE ELEMENT METHODS
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