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Unformatted text preview: 1 Student’s Name__________________ ID______________ Date _______ Student’s Name__________________ ID______________ Date _______ MECH 624 Module 4: Matrix-Fiber Interface Spring 2010-11 (Team) HW #4 Date Assigned: October 8, 2010 Due Date: October 14, 2010 ________________________________________________ PROBLEM 4.1 Three-point bend specimens were produced from an aligned continuous fibre composite of 4 mm thickness. The dimensions of the specimens were 4 x 10 x 120 mm (specimen A) and 4 x 10 x 50 mm (specimen B). The span betw een the lowe r loadi ng poin ts was 10 mm less than the specimen length. Account for the following experimental observations: (a) Specimen A failed by tensile fracture from a line midway between the lower loading points at a force of 1164 N. (b) S p e c i m e n B f a i l e d b y s h e a r a t t h e m i d p l a n e a t a f o r c e o f 2 6 7 N. 2 QUESTIONS : 1. All interfaces between the matrix and the reinforcement are stable and will never change during service even at high temperatures. and will never change during service even at high temperatures....
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- Fall '10