Chapter 3: Flexural Test

What is flexural strength?

• Behaviour of a material when it is subjected to a compressive load at a relatively low and uniform rate of loading

• The ability of the material to withstand bending forces applied perpendicular to its longitudinal axis.

• Measurement of the ability of material to withstand forces that tend to pull it apart

How many times support span need to multiply with sample thickness for it length?

• 8

• 24

• 16

How many method for plastic flexural test to be conduct in ASTM 790?

• 1

• 4

• 2

Which one of these answer is NOT flexural parameter?

• Flexural hardness

• Flexural modulus

• Flexural strength

The loading nose and support span

must have cylindrical surfaces to avoid excessive indentation. True or false?

• True

• False

Specimen alignment is MORE DIFFICULT

for tensile compared to flexural specimen which much more easier. True or false?

• True

• False

Injection molding made from Injection molding has LOW flexural strength compared to the compression molding sample. True or false?

• True

• False

How many force involved in Four point method of flexural test?

• 1

• 2

• 3

• 4

What are method number for this flexural configuration?

• Method 1

• Method 2

• method 3

• Method 4

For ASTM D 790 the test is stopped

when the specimen reaches 10%

deflection or the specimen breaks

before 10%. True or false?

• True

• False