Twoim problemem jest to, że powszechną NICOŚĆ mylisz z osobistą PUSTKĄ

1.Wzór na wzgl.przewęż.próbki: Z=So-Su/Su *100%, Z-wzgl.przewę.próbki,So-początko.pole przekro.poprzeczne.próbki[mm2],                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Su-pole przekr.poprzeczn.prób.po zerwan.[mm2]./// 2.Wzór na granicę zerwania: Ru=Fu/Su[MPa],Fu-siła obciążająca w chwili                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           zerwan.próbki[N], Su-końcowe pole przekroju poprzecz.prób.po jej zerwan.[mm2]./// 3.Co to długość wyboczeniowa i od                                                                                                                                                                                                                                                                                                                                                                                                                                                                      czego zależy? - (lw)odpowiada długości po fali przedstawiającej linię ugięcia pręta przy wybocze.Zależy od sposo.zamocowan.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                obu końców pręta.(rysunki)./// 4.Co to środek skręcania ?-to pkt.leżący w płaszczyźnie przekroju poprzeczne.taki,że przechodz.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  przez niego dowoln.siła poprzeczna T nie wywoła skręcenia przekroju(samoskręcen.).W tym pkt.występuj.tylko zjawiska ścinan.                                                                                                                                                                                                                                                                                                                                                                                                                                                                   i zginania.///5.Jakie zjawiska zachodzą dzięki tensomet.elektroopo.?-zjawisk.zachodzące dzięki tensom.elektro.to zmiana wymia.                                                                                                                                                                                                                                                                                                                                                                                                                                                                  geometrycznych wraz zezmian.rezystancji./// 6.Napisz wzór na mod.Young'a na podst.ugięcia belki.; E=3/4 Pel^2/fbh^3[Pa][GPa],                                                                                                                                                                                                                                                                                                                                                                                                                                                                 P-siła obciążająca[kn], f-odległ.między skrajnymi czynnikami[mm], b,h-wym.belki(długo.,szeroko.)[mm] (rysunek)./// 7.Narysuj                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      wykres napręż.krytycznych...-(rysunek), σ kr-napręż.krytycz., λgr-smukłość graniczna, λ-smukło.pręta,Rm-granica Hooke'a, σH-                                                                                                                                                                                                                                                                                                                                                                                                                                                   naprężenie Hooke'a./// 8.Napisz wzór na sztywność na skręcanie...: G*Is [Nm2], wyznaczamy ze wzoru na kąt skręcania: φ=Ms*l/                                                                                                                                                                                                                                                                                                                                                                                                                                                              G*Is => GIs= Ms*l/ φ, Is- moment bezwładno.na skręcanie[m4]-biegunowy momen.bezwładnoś., G-moduł Kirchhoffa[Pa], Ms-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 mom.skręcający[Nm], φ-kąt skręcania[-]. ///9. Podaj spos.na wyznacza.mod.Younga: -metod.tensometryczną, -pomiar ugięcia belki.                                                                                                                                                                                                                                                                                                                                                                                                                                                                           /// 10.Moduł Kirchhoffa-współ.sprężystości. : z prawa Hooke'a: G=τ/γ [Pa], γ-kąt odkształc.postaciowe.[-], τ-naprężenie ścinając.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          [Pa], G-mod.Kirchho.[Pa]. W zależności od mod.Younga i licz.Poissona: G=E/2(1+ϑ) [Pa], E-mod.Younga[Pa], ϑ-liczba Poissona[-].                                                                                                                                                                                                                                                                                                                                                                                                                                                                       ///11.Podstawowe równanie tensometrii oporowej. : R=δL/S, R-rezystan.przewodnik.[om], δ-rezystan.właściw.przewodnika[om*                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 mm2/m], L-długość przewodnik.[m], S-pole przekroj.poprzecz.przewodnik.[mm2].///12.Współczynnik Poissona.: ϑ=-ε'/ ε , ϑ-wsp.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  proporcjonal.noszący nazwę liczb.Poissona,spełniający nierówność., ε'-odkształce.poprzeczne, ε-odkształ.wzdłużne. ///13.Prawo                                                                                                                                                                                                                                                                                                                                                                                                                                                                            Hooke-a: praw.mechanik.określające zależność odkształcen.od napręże.Głosi ono,że odkształcen.ciała pod wpływem działającej na                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     niego siły jest wprost proporcjonal.do tej siły.Współczynn.między siłą a odkształceniem jest często nazywany współczyn.(moduł.)                                                                                                                                                                                                                                                                                                                                                                                                                                                         sprężystości. δ=E* ε, E-mod.Younga[Pa], ε-względne odkształcen.liniowe zgodne z kierunk.obciążenia.///                      

                                                                                                                                                                                                                                                                                  14.Wzór na granic.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      14.Wzór na gran.plastycz.: Re=Fe/So[MPa], Fe-siła obciążająca odpowiadaj.wyraźnej gran.plastyczn.[N], So-początko. pole przek. poprz.                                                                                                                                                                                                                                                                                                                                                                                                                                                             [mm2]./// 15.Siła krytyczna.: Fkr=π^2E Imin/L [N], E-mod.Younga[Pa], Imin-najmniejszy moment bezwładno.przekroj.poprzeczne.                                                                                                                                                                                                                                                                                                                                                                                                                                                              pręt.[m4], L-dł.pręta[m]. Obowiązuje w przypadk.wyboczenia sprężyste.,czyli, gdy naprężen.krytyczn. są mniejsze od granicy sprężys.,                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               lub: Ukr= π^2E/ λ^2, λ-smukłość pręta./// 16.Graficzna interpretacja mod.Younga: Re-gran.plastyczno., Ru-gr.zerwania,Rm-gr.                                                                                                                                                                                                                                                                                                                                                                                                                                                   wytrzymało.,Rsp-gr.sprężystoś.,Rh-gran.prawa Hookea.///

 

 

1.Wzór na wzgl.przewęż.próbki: Z=So-Su/Su *100%, Z-wzgl.przewę.próbki,So-początko.pole przekro.poprzeczne.próbki[mm2],                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Su-pole przekr.poprzeczn.prób.po zerwan.[mm2]./// 2.Wzór na granicę zerwania: Ru=Fu/Su[MPa],Fu-siła obciążająca w chwili                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           ...

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