Single-strand strainware technique: comparison with existing methods and a proposed photostrain technique.
Wade-LV; Krokosky-EM; Zelonka-JR
Exp Mech 1971 Mar; 11(3):142-144
This paper is the third of three papers evaluating a refined internal strainwire technique. This final paper evaluates the technique by comparing it with two elastic solutions, with a photoelastic solution, and with a new proposed photostrain technique. The problem chosen as the basis of comparison was a plane-stress problem of a plate with a circular hole under uniform tension. The proposed technique is experimental in nature and combines parts of the results of a photoelastic solution with those yielded by a three-wire internal strain-gage-rosette analysis to completely fix the state of stress in the model. The scientific techniques used to compare the three-wire strain technique and photostrain technique are as follows: two elastic solutions, one evaluated at a point and one arrived at by integrating the stress functions over a finite length; a finite- element solution; a photoelastic analysis using the shear-differance technique to separate the principal stresses; and a three-wire- rosette analysis. A comparison is made of the values of principal stresses yielded by these methods.
Electric-power-transmission-lines; Electric-properties; Electrical-conductivity; Electrical-equipment; Electrical-properties; Electrical-transmission
OP; Journal Article