Abstract
Keywords: longitudinal modulus of elasticity
The longitudinal modulus of elasticity in the case of potato creeping stalk, is an important parameter in establishing the required demands for the specific machinery which pull out the potato creeping stalk. For experimental determination of longitudinal modulus of elasticity belonging to the potato creeping stalk, have been used two distinct methods: the vibration method and the method of simple bar lean on the ends and overloaded with a concentrated charge.
The first method establishes on an analytical way a relation which allows the calculation of elasticity modulus when the dimension of creeping stalk sample are known as well as moment of inertial and the oscillation period of the sample embed at one end and exposed to a vibration status.
The second method of elasticity modulus determination operates with ratio between the variation of loaded charge belonging to the creeping stalk sample and increasing of deformation read to dial gauge indicator. The obtain results through the above two mentioned methods do not registries differences bigger than 6.5%.