Kagawa Y.Hsueh C.-H.CHUN-HWAY HSUEH2019-09-252019-09-25199909215093https://scholars.lib.ntu.edu.tw/handle/123456789/424969Interface debonding, sliding and protrusion behavior in tungsten fiber-reinforced epoxy matrix model composite under 'protrusion test' have been studied. Interface shear-sliding resistance of the composite is obtained from three routes: (i) applied stress-sliding length relation; (ii) applied maximum stress-protruded fiber length at loading; and (iii) applied maximum stress and protruded fiber length after unloading. The shear sliding stress is obtained applying a constant shear stress analysis. It is found that interface debonding proceeds spontaneously with the increase of applied stress from the surface at a soft metal side and one unit of debonding is about twice the fiber radius. The constant interface shear stress approach could explain applied stress-interface sliding length relation below a maximum critical applied stress. The shear sliding stresses obtained from the three routes agree and the agreement demonstrated possibility of obtaining the constant shear frictional stress using a protruded fiber length after complete unloading. However, care should be taken to eliminate Poisson's effect; i.e. a maximum applied stress exists for a given composite and experimental condition.Composite materialFiber protrusion behaviorShear sliding stressjournal article10.1016/S0921-5093(99)00166-52-s2.0-0033226604https://www2.scopus.com/inward/record.uri?eid=2-s2.0-0033226604&doi=10.1016%2fS0921-5093%2899%2900166-5&partnerID=40&md5=72e144c2c39d79f4e2eade371c6c6f41