4 IntroductionEngineering is:“ The profession in which a knowledge of the mathematical and natural sciences gained by study, experience, and practice is applied with judgment to develop ways to use economically the materials and forces of nature for the benefit of mankind ““ The application of science to the needs of humanity”“The creative application of scientific principles to design or develop structures, machines, apparatus, or manufacturing processes, or works utilizing them singly or in combination; or to construct or operate the same with full cognizance of their design; or to forecast their behavior under specific operating conditions; all as respects an intended function, economics of operation and safety to life and property”“Engineering is the discipline and profession of applying scientific knowledge and utilizing natural laws and physical resources in order to design and implement materials , structures, machines, devices, systems, and processes that realize a desired objective and meet specified criteria”
5 Water supply and distribution Electronics Radio and Television Greatest Engineering Achievements of the 20th CenturyElectrificationAutomobileAirplaneWater supply and distributionElectronicsRadio and TelevisionAgricultural MechanizationComputersTelephoneAir Conditioning and RefrigerationHighwaysSpacecraftInternetImagingHousehold AppliancesHealth TechnologiesPetroleum and Petrochemical TechnologiesLaser and Fiber OpticsNuclear TechnologiesHigh-performance Materials
7 What does a MECHANICAL engineer do??? Mechanical Engineering and Our WorldWhat does a MECHANICAL engineer do???
8 Mechanical Engineering and Our World Mechanical engineering is an engineering discipline that involves the application of principles of physics for analysis, design, manufacturing, and maintenance of mechanical systems.Mechanical engineers use the core principles as well as other knowledge in the field to design and analyze motor vehicles, aircraft, heating and cooling system, watercraft, manufacturing plants, industrial equipment and machinery, robotics, medical devices and MORE!
9 Mechanical Engineering Some core subjects in mechanical engineering are:Statics and dynamicsStrength of materialsSolid dynamicsInstrumentation and measurementThermodynamics, heat transfer, energy conversion, and HVACFluid mechanics, and fluid dynamicsMechanism design (including kinematics and dynamics)Manufacturing processesHydraulics and pneumaticsEngineering designMechatronics and control theoryOtherA combination of these core subjects, leads to research in engineering: Creating solutions for humans needs!
10 Disciplines of Mechanical Engineering Thermal Science:The discipline that encompasses:ThermodynamicsFluid mechanicsHeat transfer
11 Disciplines of Mechanical Engineering Dynamics Vibrations and Acoustics:Characterization of mechanical components, structures, systems and materials, to support product development, safety, weight minimization and component optimization for aerospace, automotive, electronics and general manufacturing.
18 Disciplines of Mechanical Engineering Polymer Engineering:Focuses on advancing technologies for a wide range of polymer and polymeric composite manufacturing processes.
19 Disciplines of Mechanical Engineering Biomechanical Engineering:It deals with the development of fundamental and applied engineering knowledge related to biomechanical systems, and the application of engineering expertise towards the design and development of leading-edge technologies to help people with disabilities.
20 Disciplines of Mechanical Engineering Energy EngineeringStudies different types of energy (electrical, mechanical, fuel, …) to implement efficient systems that can be usedBoom of Green Energy
21 Disciplines of Mechanical Engineering Computer Aided EngineeringApply mathematical theories, computationally efficient algorithms, and other tools for modeling, design, and simulation of a wide range of engineering artifacts and processes.Some focus areas can be mechanical, micro/nano-mechanical, electro-mechanical, thermal, fluid, and other multi-disciplinary and multi-scale systems.
24 ConclusionMechanical engineers are professional problem-solvers who strive to find practical solutions that will benefit people or society.
25 The drive from Oakland to Pinewood: Brain teaserThe drive from Oakland to Pinewood:I covered the uphill distance of 70 Km at 42 km per hour. The return journey from Pinewood to Oakland was downhill, and I managed to drive at 56 km per hour. What was my average speed for the entire journey?
26 Brain teaserAverage speed = Total distance / Total time Total distance = 2 × 70km. Time for uphill journey (from Oakland to Pinewood) = 70 / 42 hours. Time for downhill journey (from Pinewood to Oakland) = 70 / 56 hours. Total time = (70 / 42) + (70 / 56) Average speed = Total distance / Total time = 48km per hour. The common mistake made in solving this problem is to assume the average speed to be the arithmetic mean, i.e., ( )/ 2 = 49 km per hour.