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Samenvatting H2 SGDM
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H2 van SGDM (S. Gothivarekar) gebaseerd op zijn cursus
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H2 stijfheid en elasticiteit van materialen2.1 inleiding
Elastisch gedrag = wanneer een object vervormd onder belasting en zijn originele
vorm terug neemt wanneer de belasting weggenomen wordt
Doorbuigen van springplank
Vliegtuigvleugel
Rekker
…
Stijfheid = weerstand die een voorwerp biedt tegen vervorming
Soms willen we een hoge stijfheid (brug, hoge gebouwen)
Soms willen we een lage stijfheid (poolstok, elastiek voor bungee springen)
k = stijfheid (voor een veer de veerconstante)
Fz
k= [N/m] Fz = axiale kracht
∆L
ΔL = L- L0 (verlenging van de staaf)
2.2 karakteriseren van materialen onder uniaxiale belasting
Stijfheid hangt niet alleen af van materiaaleigenschappen, maar ook van afmetingen &
vorm. Om hier onderscheid in te maken: spanning en rek.
Uniaxiale belasting = belasting in 1 richting (trekken of duwen)
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