lecture1 - Lecture #1 ENG 104 Mechanics of Materials -...

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Unformatted text preview: Lecture #1 ENG 104 Mechanics of Materials - Winter 2010 ADMINISTR‘ATION (HOUSE-KEEPING) Instructor: Mark Modera fl 7/6) 23 Telephone: 754-7671 / Email: mpmodera@ucdavis.edu VIA/{5 30 Office Hours: T, Th 11:30AM—1230PM; 3120 Eng ||l fl 2 :/ Teaching Assistants: Alma Garcia agarci@ucdavis.edu Garry (Hung—Jung Hung) hhung@ucdavis.edu M W r” Text: ‘ Mechanics of Materials - 5th Edition by Beer et al. Grading: Homework 25%, Midterm Exam 35%, Final exam 40% Homework Policy: EA a 38 0mm! @gp Homework Assign: Tuesday (at end of class) Homework Due: Thursday one week after assignment (before midnight) Late Homework: One day late => 10% deduction Less than one week late => 50% deduction Must be your own work Show all work Encouraged to discuss principles with classmates Homework is key to grasping the material Solutions posted one week after due date Exams: Require thought, but not tricks Lay out the problem and show all intermediate calculations No points for what you have in your head, but not on paper Open book and open notes SUBJECT MATTER OVERVIEW ” The study of the behaviorpf material (solid) bodies that are subjected to imposed forces’k‘ (MC! 10.? WWM MM} Why do we want to do this? ...A large part of engineering involves designing and analyzing structures that must safely sustain various loads when serving their functions... For example: Bridges, buildings, dams, machines, vehicles, airplanes, body parts Importance of Subject Matter As engineers, we are responsible for creating load—bearing structures that meet particular performance criteria. Most basic criterion is that a structure/maohine-element retain a shape and form to fulfill its intended function: if an airplane wing twists too much, the plane will not fly If a support element bends too much, a bridge falls down lfthe wind bends a glass window on a high-rise too far, it breaks and spews glass all over the occupants or the street below Load bearing structures must be designed against DIFFERENT TYPES OF FAlLURE: 1. Excessive deformation 3% a. /(J l 2. Permanent deformation Mme, ’fi/i’ vff/ 3. Fracture How do we do this as engineers? 1. Model/ analyze things 2. Measure/test things 3. Design things This course is focused on the first of these interrelated activitiesll 3 basic ingredients of solid mechanics problems: N What happens if they do not? ~ VH3 5 GI” . f I ' I I 2/ OVQI‘WJ ‘ 2. KINEMATICS. Geometrical and deformation consrderations 1. EQUILIBRIUM: forces and moments at any point in a body must balance “rt-'- 5 w) z i 3. MATERIAL PERFORMANCE: Relation between deformations and the forces that cause them (fi// ‘ Statically Indeterminate: Need to use all three to solve the problem - Statics (E35) Covered #1 - Not enough equations for the number of unknowns #3 is new to you ‘ I @éé f 4/ {\Q N 3 ( 7:855 S _ _, My e ., f f » é, ,igiiVéflnMan’EOé/ysick/Sjéd-Q‘é‘efiéféa/ . f ,. , 45mg: “pubic/271‘s. f0...e?L/z’./£bnwn/ ,, A. ‘ A ” ¥ " FM/"Je ,. , f ., ,, ,, faker/m,122mmflax/7952.....742we 02+ Suaéc *"' mth -..;“WV...,...7.-..,-.‘_,_.-_.-,._.....H , ,_ .A-A.V_,__.,_-. ,, ..___-k--.....A-.‘.-_._-..H-~v.,.H.__.,.. .0611? 72,0 6+ n; Vet—Lwr—wmrmaf Plane '» - wfwah - O ,, , u a .A . , .. _, a .. .. _ Lifbau-m, T Bibi? m3. , .. . .7 ., fl flog ,. . . ,, ,V. -';,_ i.l\,,.\/_\ “ NM": I A ‘IXAA k \IZ_ WA ‘7 AV @3 w J ’v- "' ,. . 6% Swm ‘ V . a i \«Comesddw‘mgfloflflnmsmndtléég J . _V .. 7. .. , , @z ,. ._ \ \v . ‘ N _. Q 7 7K? A. .. _. ‘57“ “é'i'b 31$ mama“ C9 $¢¢k§h it, V g. .:9:;(5(:kwa+é&cmg , ¥ A, , H V.’ K ’ H , h dag _ fianjemfly to.__, /‘” WWW? mmA «gm-Fm * ' of,‘ : @f/QHAQ’ QM unfi‘bm »_ _- ~- * _‘ c633 manta: Maegxmga ms SW amt ’6' me 9d (a \ES 0 thfl‘HL/ISSQS 0 \ds; VD’YSJPithMg e‘rfl‘ (Jflié'd‘p’) ovevfiechm K ~‘x ,, A ,_ " W ' ‘ N A - wrumfimmfivsfimawmewr ~- - 3:3" mm “133' V ~hl ‘9; ~31“ M2 a Cfiwkw ('9‘ther “(as O» (7) pm (if: 6 how/w atcmécebmzf—QQ MILO RICEFEQ' ' -_,,,- WWW.-.»?;n:h.W.;,-,__--T,_fl,_‘.m,-‘_k....4-w..,_-.,‘.,W, _, H ._ . ,.-__, r,,.__._w__.“wan/“Mm.” ,, 7w ,. r ,, i mmiégif Qmm . @rfi'mfififi " ' _, ,_ _©739’7}-‘30¢%§9047V5>W ’ “7%?17247, , e_ _i ~ ~ ~ _ L e ._ v ” ,e ’ fl ' " , 5L9. d‘mm-g rmfund‘eca fiaLAfie___, . rams, , **~~+vwmww«w~wmmwmnmw;gm::::*— ,_ 1% CWWWW 5, '9 ‘1 ‘P f" ' " ...-_(.‘e.ct_mi~-.w.m_w 817mm {'hgenemfi, ,, d j 'r'mfiof)méflhempdfis..o£:%begbdd9té1fi@-VW HOMEWORK ASSIGNMENT Pmbbms Due: 13,113,140,147,153,168 Jan 14 ...
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This note was uploaded on 04/09/2010 for the course ENGR ENG104 taught by Professor Modera during the Winter '10 term at UC Davis.

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lecture1 - Lecture #1 ENG 104 Mechanics of Materials -...

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