For linear elastic homogeneous material, the shear stress along any radial line of the shaft also varies linearly, from zero at its axis to a maximum at its outer boundary. This maximum shear stress must not exceed the proportional limit. / Vir lineêre elastiese homogene materiaal, wissel die skuifspanning langs enige radiale lyn van die dryfas ook lineêr, van nul by sy as tot 'n maksimum by sy buitenste grens. Hierdie maksimum skuifspanning moet nie die proporsionele limiet oorskry nie.

The torsion formula is based on the requirement that the resultant torque on the cross section is equal to the torque produced by the shear stress distribution about the longitudinal axis of the shaft. It is required that the shaft or tube have a circular cross section and that it is made of homogeneous material which has linear elastic behavior. / Die torsie formule is gebaseer op die vereiste dat die resulterende wringkrag (torsie) op die deursnit gelyk is aan die wringkrag wat deur die skuifspanningverdeling om die lengte-as van die dryfas geproduseer word. Dit word vereis dat die dryfas of buis 'n sirkelvormige deursnit het en dat dit van homogene materiaal gemaak is wat lineêre elastiese gedrag het.

Due to the properties of shear, the linear shear stress distribution within the plane of the cross section is not distributed along an adjacent axial plane of the shaft. / As gevolg van die eienskappe van skuif word die lineêre skuifspanningverdeling binne die vlak van die dwarssnit nie langs 'n aangrensende aksiale vlak van die dryfas versprei nie.

When a shaft having a circular cross section is subjected to a torque, the cross section remains plane while radial lines rotate. This causes a shear strain within the material that varies linearly along any radial line, from zero at the axis of the shaft to a maximum at its outer boundary. / Wanneer 'n dryfas met 'n sirkelvormige deursnit aan 'n wringkrag onderwerp word, bly die deursnit vlak terwyl radiale lyne roteer. Dit veroorsaak 'n skuifspanning binne die materiaal wat lineêr langs enige radiale lyn varieer, van nul by die as van die dryfas tot 'n maksimum by sy buitenste grens.

None are false. / Geeneen is vals nie.