Effect of nanoclay (Kaolinite) on mechanical properties of epoxy-fiber composite

Kaolinite Drag-out Interfacial shear strength carbon fiber kevlar fiber رٍثأت ةدام يونانلا نٍطلا ( Kaolinite ) ىلع صئاصخلا تٍكٍناكٍملا بكرمل فاٍللأا ًسكوبٌلإا ذٍجم ذعر ذمحأ نسح ذمحم ماشه قاشعلا , تٍسداملا ,ءاٌضٍفلا مسل ,تٍبشخلا تٍلك ,تٍسداملا تعماج :تٍحاخفملا ثاملكلا لا ــــ خ ـــ صلا ـــ ت جٍىٍلواك بحسلا صحف ةول ًىٍبلا صملا نوبساكلا فاٍلا شلفكلا فاٍلا ًمسكوبٌا بمكاشخمل ًمىٍبلا صمملا ةومل يامسحل دشمفىملا لمٍللا بحمسلا صمحف صاذخخمسا ممح لام همم ًمسكوبٌ ا تفوفمنمل ضمٌضعخبو شملفكلاو نوبساممكلا همم ةسومممم فامٍلا ةذمعل و شبٌامف تمٍكٍواكٍملا صاوخلا ياسحل كلرو تفوفنملا ىلا)جٍىٍلواك( يلاكوواىلا هم تٍوصو بسو تفاضا افاض ا شٍثأح تساسدو سوممملا لٍللا وط ةداٌص كلزكو ًىٍبلا صملا ةول ىلع تفوفنملا ًف ث لٍللاو تفوفنملا هٍب كصلاخلا ةول ًف يشٍثأحو . JOURNAL OF KUFA–PHYSICS | Vol. 12, No. 1 (2020) Hisham MHasan, Ahmed R Majeed 39 adhesion strength can help in evaluating the mechanical behavior and capabilities of composite materials [1,3]. A large number of analytical techniques have been developed for understanding interfacial adhesion of Kevlar and carbon fibers reinforced epoxy matrix such as drag-out adhesion test of U-shaped single fiber specimen, the interfacial shear strength which interfacial parameter calculated used by Kelly-Tyson-analytical model [4]. Drag-out micromechanical test of U-shaped specimen [4].To measure the maximum drag-out force or peak force from force-displacement curve by S.Nuriel [1]. By adding kaolinite as nanocly to the epoxy matrix for increasing the bond between fiber and matrix due to increasing the interfacial shear strength at the interface[5] 2. THEORY One of the more important tests is dragging out and using to calculate peak force with displacement to get interfacial shear strength this test, the theory was putting by Nuriel model The drag out use a form of U-shape for testing, that sample has a free length and tow embedded A force is applied at appoint on free length in the direction normal to fibers as in figure(1) A hook applies a tensile from the left (A)and the right (B)edge (H) is a distance normally to baseline (AB) this force causes attention (T) that exerts to debond the fiber from matrix. Fig.(1): Shows pulling fiber during test Fig.(2): Dragging out test In dragging out that described in figure (2) as follow: ( ) ( )