Abstract
This paper reports the results of tests carried out under the supervision of Prof. Earl D. Hay in the materials-testing laboratory of the University of Kansas to determine the bearing strength of commercially available high-impact molded and laminated plastic sheets and resin-bonded birch plywood. Curves are shown for load versus deformation in per cent of bearing-pin diameter, and load versus permanent set in per cent of bearing-pin diameter. The tests demonstrated the inferiority of plywoods in bearing strength as compared with the reinforced plastics. Heating in most cases improves the bearing strength of specimens, while soaking them in water definitely decreases their strength, as compared with results on specimens conditioned at room temperature and a relative humidity of 55 per cent.
