Abstract
Particle reinforced plastics (PRP) have highly stiffness and flexible workability. Therefore, they were widely used as efficient repair material for damages including cracks and erosions. However, delamination behavior and strength of lining-applied PRP have not been clarified. In this study, we examined tensile test using particle-reinforced resin material bonded on 2 types of tensile test pieces; one is made by polycarbonate as transparent material to observe delamination behavior, and the other is made by SUS304 to evaluate delamination strength for practical use. Each test was carried out with tension rate of 1.0 mm/min and strains of PRP, PC and SUS304 were measured by strain Gages. As the result of PRP bonded on PC tensile test piece, relationship between delamination behavior and strain was clarified. At first, delamination of PRP started and gradually propagated with increasing strain of PRP. After that, steep delamination occurred and strain of PRP steeply decreased. The result indicated that steep delamination of PRP can be determined by its strain. In the result of PRP bonded on SUS304 tensile test piece, steep delamination could be also observed as steep decrease of PRP strain. Strains of tensile test pieces at steep delamination for PC and SUS304 were different; strain of PC tensile test piece at steep delamination was higher than strain at 0.2 proof stress of PRP. Strain of SUS304 tensile test piece was smaller than that at 0.2 proof stress of PRP.
