What is flexural modulus and flexural strength?
In mechanics, the flexural modulus or bending modulus is an intensive property that is computed as the ratio of stress to strain in flexural deformation, or the tendency for a material to resist bending. The flexural modulus defined using the 3-point bend test assumes a linear stress strain response.
How do you interpret the flexural modulus?
The stiffness of plastics is described by flexural modulus (the ability of a material to bend), which is measured in pounds per square inch (psi). The higher the flexural modulus, the stiffer the material; the lower the flexural modulus, the more flexible it is.
What is the material PC?
Polycarbonate (PC) plastics are a naturally transparent amorphous thermoplastic. Although they are made commercially available in a variety of colors (perhaps translucent and perhaps not), the raw material allows for the internal transmission of light nearly in the same capacity as glass.
What is the elastic modulus of polycarbonate?
Polycarbonate
| Young’s modulus | 2200 | MPa |
|---|---|---|
| Density | 1210 | kg/m3 |
| Resistivity | 2.1E+20 | Ohm*mm2/m |
| Breakdown potential | 41 | kV/mm |
| Dielectric loss factor | 0.00075 |
How do you calculate flexural strength from flexural modulus?
Three-Point Test Flexural Strength Calculation So to calculate the flexural strength (σ), multiply the force by the length of the sample, and then multiply this by three. Then multiply the depth of the sample by itself (i.e., square it), multiply the result by the width of the sample and then multiply this by two.
What is a high flexural modulus?
The flexural modulus is inversely related to deflection – a lower deflection would result in a higher modulus. So a higher flexural modulus material is ‘stiffer’ than a lower flexural modulus material.
Is PC material hard or soft?
Hello from Dreem and thanks for your inquiry. PC (polycarbonate) is a high-impact resistant rigid plastic and has been used as an inner case material since the Fibonacci’s introduction. TPU (thermoplastic polyurethane) is a flexible plastic, less rigid than PC, but not to the soft flexibility of silicone.
What is the representative Young’s modulus for polycarbonate PC in KSI?
Polycarbonate ( PC ) – Conductive Polycarbonate – Properties – Supplier Data by Goodfellow
| Property | Minimum Value (S.I.) | Units (Imp.) |
|---|---|---|
| Poisson’s Ratio | 0.3182 | NULL |
| Shear Modulus | 5.03 | 106 psi |
| Tensile Strength | 124 | ksi |
| Young’s Modulus | 13.5 | 106 psi |
What is the elastic modulus of aluminum?
69
| Material | Tensile Modulus (Young’s Modulus, Modulus of Elasticity) – E – (GPa) | Ultimate Tensile Strength – σu – (MPa) |
|---|---|---|
| Aluminum | 69 | 110 |
| Aluminum Alloys | 70 | |
| Antimony | 78 | |
| Aramid | 70 – 112 |
How is flexural modulus calculated?
Flexural Modulus or Bend Modulus Flexural Modulus denotes the ability of a material to bend. The flexural modulus is represented by the slope of the initial straight line portion of the stress-strain curve and is calculated by dividing the change in stress by the corresponding change in strain.
What is the formula for flexural strength?
Flexural strength test Flexural strength is calculated using the equation: F= PL/ (bd 2 )———-3 Where, F= Flexural strength of concrete (in MPa). P= Failure load (in N). L= Effective span of the beam (400mm). b= Breadth of the beam (100mm).
What is the unit of flexural modulus?
The International Standard unit of Flexural Modulus is the pascal (Pa or N/m 2 or m -1 .kg.s -2 ). The practical units used are megapascals (MPa or N/mm 2) or gigapascals (GPa or kN/mm 2 ). In the US customary units, it is expressed as pounds (force) per square inch (psi).
What is Bend modulus of elasticity?
Flexural Modulus or Bend Modulus. Stiffness (or rigidity) is a property of a polymers that is described by Flexural modulus or bending modulus of elasticity. It is therefore one of the most important properties of solid materials. Flexural Modulus denotes the ability of a material to bend.
What is the difference between tensile modulus and stress pattern?
The values are significantly different from the tensile modulus because the stress pattern in the specimen is a combination of tension and compression. The data is useful for comparing the strength and stiffness of different plastics when a load carrying part is subjected to bending in service.
What is the relationship between aspect ratio and flexural modulus?
Higher the aspect ratio, high is the stiffness. For example, talc has high aspect ratio, typically 20:1, and is one of the most efficient minerals for improving flexural modulus.