JD88
Oct21-09, 09:28 PM
If I wanted to determine the principle stresses on the surface of a circular tube could I use a 45deg planar rectangular rosette to measure the strains \epsilonx, \epsilony and \gammaxy? I only ask because on a flat surface the gauges could be oriented along the x-axis, the y-axis and 45 deg between them, but is this still true on a curved surface?
Lets say the y-axis is parallel to the axis of the tube. The x-axis is obviously perpendicular to the y-axis but this means the x-axis is tangent to the surface of the tube. So is it still valid to say I am measuring \epsilonx ? Should I be using cylindrical coordinates in stead of x and y?
Is there some other way to determine the principle stresses on the surface of a circular tube?
Lets say the y-axis is parallel to the axis of the tube. The x-axis is obviously perpendicular to the y-axis but this means the x-axis is tangent to the surface of the tube. So is it still valid to say I am measuring \epsilonx ? Should I be using cylindrical coordinates in stead of x and y?
Is there some other way to determine the principle stresses on the surface of a circular tube?