Surface stress measurement techniques in metal forming

Abstract This paper describes and classifies stress measurement techniques used in metal forming to provide research workers with a critical evaluation of usable methods. Eight techniques are considered; pressure transmitting pins, photoelasticity, ridged metallic sheets, paper sheets, split tools, strain gauged tools, orifices in tools and visioplasticity. In addition to these, some new transducer designs using optics and conical pins are presented. These are particularly useful for pressure measurement in hot forming operations.

[1]  J. B. Hawkyard,et al.  A split-platen pressure cell for the measurement of pressure distribution in upsetting operations , 1971 .

[2]  T. Dean,et al.  Surface Stress Measurements using Conical Oblique Pins on a Forging Die Mandrel , 1987 .

[3]  Mads Peter Schreiber.  Combined physical and numerical simulation in metalforming , 1985 .

[4]  Surface Stresses in Cold Forward Extrusion , 1983 .

[5]  G. T. V. Rooyen,et al.  Distribution of interface stress in plane strain and axial symmetric compression , 1959 .

[6]  E. P. Unksov,et al.  A photoelastic investigation of contact stresses in the backward extrusion process , 1975 .

[7]  E. Orowan,et al.  A Photoelastic Dynamometer for Rapidly Varying Forces , 1950 .

[8]  Trevor A. Dean,et al.  A new pin design for pressure measurement in metal forming processes , 1987 .

[9]  S. Dwivedi.  Plane strain visioplasticity for dynamic and quasi-static deformation processes , 1983 .

[10]  V. Maegaard.  The use of the model technique in the prediction of the pressure distribution over the tool surfaces in cold forging , 1985 .

[11]  Tarras Wanheim,et al.  Development of friction tests for lubrication in model-material experiments , 1985 .

[12]  F A Khayyat,et al.  A photoelastic examination of the stresses in rolls during rolling , 1969 .

[13]  J. B. Hawkyard,et al.  Pressure-Distribution Measurements in Rotary Forging: , 1977 .

[14]  J. G. Wistreich,et al.  Measurement of die pressures in wire drawing by photoelastic methods , 1952 .

[15]  G. T. V. Rooyen,et al.  A study of interface friction in plastic compression , 1960 .

[16]  P. Bariani,et al.  Contact pressure distribution in circular tube expansion using a conical plug , 1982 .