J/m2↔kJ/m2 1 kJ/m2 = 1000 J/m2. J/m2↔mJ/um2 1 mJ/um2 = 1000000000 J/m2.
Multiply the Izod value by 2.738223. 3 Record your new value. This is the Charpy value obtained by multiplying Izod by the Charpy constant.
Impact strength is calculated by dividing the impact energy in J (or ft-lb) by the thickness of the sample. The test result is typically the average of 5 samples. The ISO impact strength is expressed in kJ/m2. Impact strength is calculated by dividing the impact energy in J by the area under the notch.
In the IZOD test, the notch direction points towards the firing pin, which is pivotally mounted. While in the Charpy test, the notch direction is positioned away from the firing pin. The impact test is mainly performed by two types of notches i.e. H. U notch & V notch.
Both Charpy and Izod impact tests are popular methods of determining the impact strength or toughness of a material. In other words, these tests measure the total amount of energy a material can absorb. This energy absorption is directly related to the brittleness of the material.
“Tensile strength is a measure of the maximum stress that a metal can withstand before it begins to break. Fracture toughness (impact strength) is a measure of the energy required to break a material containing a crack.
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Impact strength – also called impact strength – is the amount of energy that a material can withstand when the named load is applied suddenly. It can also be defined as the force threshold per unit area before the material breaks .