Coarse number and lab section
Letter of Transmittal
- Deflection and Loading Tables and Graphs
- Fiber Glass loading and deflection Table and Graphs
Where :
P= load,
L= span length,
b=width,
and d=depth
- Calculation of flexural strain:
εf= 6∆d/L2
Where ∆ represents maximum deflection
- Calculation of modulus of rupture MOR
MOR=Mc/I
Where M = moment at mid-span
C=d/2
I= Moment of inertia
- Calculation of tangential modulus of elasticity
Et=PL3/48I∆
Where
P= load
∆=deflection at centre span
I=moment of inertia
L=span length
- Calculations
Glass fiber parameters
- Modulus of Rupture (MOR)
MOR=Mc/I
I= pr2 =20*1.842 =67.712 lb Inch.2
M= 0.945*20=18.9 lb Inch
MOR=18.9*0.057567.712=0.016lb/Inch2
- Tangential Modulus of elasticity
Et=PL3/48I∆
Et=20*1.84^3/(48*67.712*0.09)= 0.4259 Lb/in2
- Flexural yield Strength
σ=3PL/(2bd2)
σ=3*20*1.892*0.46*0.115=1071lb/in3
Assumptions,
P=20lb
Maximum deflection at 20lb = 0.09inches
Carbon Fiber Parameters
- Modulus of Rupture (MOR)
MOR=Mc/I
I= pr2 = 20*1.282= 32.768 lb Inch.2
M=0.64*20=12.8 lb Inch.
MOR=12.8*0.0432.768=0.0156 lb/Inch2
- Tangential Modulus of elasticity
Et=PL348I∆
Et=20*1.28348*32.768*0.078=0.3419lb/inch2
- Flexural yield Strength
σ=3PL/(2bd2)
σ=3*20*1.282*0.32*0.082=1920lb/inch3
Assumptions,
P=20lb
Maximum deflection at 20lb = 0.078inches
