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Tegnologie

Graad 8

Strukture

Module 3

Versterking van strukture

Aktiwiteit 3

Hoe versterk ons strukture?

  • Reghoekige voorwerpe is nie altyd van die stewigste nie. ‘n Reghoek verander maklik in die vorm van ‘n ruit, indien ‘n krag daarop uitgeoefen word. ’n Driehoek is beslis die figuur wat die grootste stewigheid gee. Dink gou aan die raam van jou fiets. Is daar enige driehoeke?

Opdrag 3

  • Neem vier kartonstrokies elk ongeveer 150 mm lank en maak ‘n vierkant deur die strokies met gesplete papierspelde by die hoeke te bevestig. Toets die sterkte van jou struktuur deur daarteen te druk. Versterk dit nou deur stutte in te voeg!

LU 2.2
  • Dié soort versterking staan bekend as driehoeksversterking en word in alle raamstrukture gebruik. Dit is veral sigbaar in brûe, hyskrane en dakkappe.

Opdrag 4

  1. Die boekrak hieronder moet versterk word. Voeg ‘n stut(te) in om die rak te versterk.
  1. ‘n Bokkie waarop ‘n tafelblad rus se pote is met ‘n tou verbind. Sal die struktuur spanningkragte of samedrukkingkragte kan weerstaan? Verduidelik jou antwoord en gee ‘n oplossing vir die probleem.
LU 2.2

Assessering

LU 2
tegnologiese kennis en begrip Die leerder is in staat om relevante tegnologiese kennis te verstaan en dit eties en verantwoordelik toe te pas.
Dit is duidelik wanneer die leerder:
strukture:2.1 kennis en begrip van raamstrukture toon:
  • die gebruik en toepassing van basiese strukturele komponente (kolomme, balke, boë);
  • tegnieke vir die versterking van raamstrukture (driehoekvorming, webbe en oriëntering en dwarsdeursnitoppervlak en lede); hoe raamstrukture sterk gemaak kan word (bv. verband tussen die grootte en vorm van die basis, die swaartekragpunt en punt van stabiliteit;
verwerking:2.2 kennis en begrip toon van hoe stowwe/materiaal verwerk kan word om die eienskappe daarvan te verander of te verbeter deur dit te wysig ten einde dit geskik vir spesifieke doeleindes te maak:
  • om kragte te kan weerstaan (spanning, kompressie, buiging);
  • om sterkte of lewensduur te laat toeneem;
  • hoe spesifieke kenmerke wat vir verpakking geskik is, bewerkstellig kan word.

Questions & Answers

what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Tegnologie graad 8. OpenStax CNX. Sep 13, 2009 Download for free at http://cnx.org/content/col11051/1.1
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