How does the Modulus of Elasticity affect design planning?
The high Ultimate Strength to a low Modulus of Elasticity (E) Ratio, deflection is the limiting design factor. Deflection is a function of Modulus of Elasticity, all other factors being equal (i.e. shape). Does the Modulus of Elasticity change with the different sizes of FRP rebar? No. It is an inherent physical property of the material. What is the mode of failure? Glass does not yield. Yield strength and ultimate strength are the same point. Glass is a brittle, not a ductile material. How does the flexibility, or low Modulus of Elasticity, affect design? The designer deals with deflection by using more FRP reinforcement than he would in designing for steel, i.e., more or larger bars; or by using deeper beams, etc. What form is the Stress/Strain curve? The Stress/Strain curve is a straight line to failure, at a slope equal to E, up to Ultimate Strength of approximately 150,000 psi (approximately 4 times ASTM Grade 40 steel) What is the Fatigue and Stress/Strain Relationship? The Unive
