Summary
Summary Tegnologie opsomming Kw 1 Graad 9 CAPS
Hierdie opsomming sluit in: - Kragte - Gelyke en ongelyke laste - Sterkte van materiale onder die inwerking van kragte - Eienskappe van verskeie konstruksie materiale
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StruktureKragte
Statiese en dinamiese kragte
Strukture dra altyd ‘n las.
Die lading kan staties of dinamies wees.
Statiese kragte beweeg nie.
Dinamiese kragte beweeg en verander.
Dinamiese kragte is gewoonlik groter as statiese kragte.
Alle strukture moet dinamiese laste kan weerstaan, selfs al dra hulle hoofsaaklik statiese laste.
Goed ontwerpte strukture moet alle soorte kragte wat op hulle onwerk, kan weerstaan.
‘n Brug is ‘n baie goeie voorbeeld van ‘n kombinasie van statiese en dinamiese kragte.
Gelyke en ongelyke laste
‘n Gelyke las is een waarvan die gewig egalig oor ‘n struktuur versprei is.
‘n Ongelyke las is een waarin die gewig op een deel van die struktuur groter is as op ‘n ander deel van
die struktuur.
Sterkte van materiale onde die inwerking van kragte
Alle strukture in die wereld, mensgemaak en natuurlik, is onderhewig aan kragte, soos spanning,
drukkragte, buiging en wringing.
Wanneer ‘n mens ‘n struktuur ontwerp, moet jy seker maak dat die materiaale wat jy gebruik, die
inwerking van kragte op die strukture kan weerstaan.
Ons gaan die uitwerking van die volgende kragte ondersoek:
• Spanning
• Kompressie
• Buiging van balke
• Wringing
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