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Tegnologie

Graad 7

Strukture en kommunikasie

Module 20

Strukture

Strukture

Toon kennis en begrip van strukture ten opsigte van:

  • spesifieke eienskappe en gebruik van materiaal (bv. waterbestandheid, termiese isolering, brandbestandheid);
  • stabiliteit (bv. basisgrootte, swaartepunt);
  • versterking (bv. rimpeling, laminering, verstewiging);
  • las- en voegtegnieke.

SPESIFIEKE EIENSKAPPE EN GEBRUIK VAN MATERIAAL

Agtergrond

Strukture moet ontwerp en gebou word sodat dit die kragte wat daarop inwerk, kan weerstaan. Die sterkte van ‘n struktuur word bepaal deur

  • die sterkte van die materiaal waarvan dit gemaak is;
  • die gehalte van die verbindings tussen die dele;
  • die vorm van die struktuurdele;
  • die manier hoe die dele gerangskik is.

TERMIESE ISOLERING is wanneer sekere materiale soos plastiek sterk gemaak word sodat hulle hitte kan weerstaan. As hulle eers in ‘n spesifieke vorm gegiet is, kan hulle nie weer van vorm verander nie, aangesien hulle weerstand teen hitte bied. Omdat hulle so hard is , kan hulle wel maklik kraak en breek. Voorbeelde hiervan is die bakwerk van sekere voertuie, sommige gomme, werkoppervlaktes in kombuise, die handvatsels van potte en panne, die bedekkings van skakelaars en sommige bakke, bekers en glase van plastiek.

Opdrag 1:

Om voorbeelde van strukture te soek

LU/AS 2.1.1

Soek voorbeelde van strukture wat met termiese isolering gevorm is en plak dit op ‘n vel papier.

Voorwerpe wat BRANDBESTAND is, toon ‘n weerstand teen hoë hitte. Voorwerpe wat WATERBESTAND is, is waterdig gemaak en kan maklik onder water gedompel word sonder om nat te word.

Versterking

Maniere om sekere strukture te versterk, is deur:

  • RIMPELING, bv. blikke vir opstapeling, en asbesdakplate;
  • LAMINERING, bv. deur plekmatjies of hout oor te trek met plastiek.

Omdat hout terugspring na sy normale posisie as dit gebuig word, is dit nie maklik om geboë of gekurfde voorwerpe uit reguit stukke hout te maak nie. Die praktiese manier om hout permanent te buig, is deur LAMINERING. Party stoele word met gelamineerde hout gemaak. Dun lae hout word aanmekaar gegom. Dit is maklik om ‘n dun laag hout te buig. Elke laag het gom aan en word gebuig oor ‘n vorm en in dié posisie gehou tot die gom droog is. Tennisrakette en dakbalke kan so gevorm word. Het jy al gehoor van gelamineerde vloere? Hoe word dit gemaak?

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.
verwerking:2.2 kennis en begrip toon van hoe stowwe/materiaal verwerk kan word om eienskappe te verander of te verbeter (bv. sterkte, brandbestandheid, waterdigtheid, smaak, volume, tekstuur

Questions & Answers

what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
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
How can I make nanorobot?
Lily
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
how can I make nanorobot?
Lily
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
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Source:  OpenStax, Tegnologie graad 7. OpenStax CNX. Sep 10, 2009 Download for free at http://cnx.org/content/col11031/1.1
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