Question

3a. Give the name and significance of the equation below and define all the terms used. Pe= Pror+ PmOm 3b. If the density of glass fiber reinforced epoxy composite is 2.1 g/cm' and those for the glass fibers and epoxy resin matrix are 2.6 g/cm and 1.2 g/cm", respectively, calculate the volume fraction of glass fibers needed to fabricate the composite.

Answer 1

Ans 3a

1 Pe- P Qf & Pmom This equation is used for fabrication of Aber geloen composit matericel production which states that density of composit material m Fiber glass lie directly proportional to sum of multiplicoption of volume bruction and density of liber and mostly perpectively where sc. Density of composit material If a Density of alber- Ima Dansity of mortalxi om a volume Duetion of matrix. or volume beretion of Aber. om. Nolume of motory total volume of composit bor s volume of riber total volume of composit

Ans 3b

1 Scc Density of composit. 21 910m Som & Density of mataly - 1.2 g / m3 er - Density of libre a 2.6 alam Volume bruction of glass liber com be calculated based on following equation, Sc Dege & Clour) em 21 = Vox 2.6 & (I- Or) 1.2 2.1 = 2.6 Of of 1.2.1.2 DE Luvra 0.9 14 Tur= 0.64 so wolume fruction of glass fibre is 0.64