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**Mechanical Site**. Know here all about**What is stiffness?**in material engineering and its**importance in mechanical property**.**All About Stiffness**

__Stiffnessis the ability of__

**What is stiffness and it's importance in mechanical properties?****materials**to resist deformations under the action of loads. So this is stiffness that it will be the ability of any given material to resist deformation that is a material should not change its shape, when the load is applied and when we go on increasing the value of load then the deformation should be very very small. It should not increase with the increase in load.

### Example of Stiffness:

Like for example if I can say that if the load is 10 Newton then the deflection is around 1 mm if it is 20 Newton then the deflection becomes 10 mm. So it should not be like this the deformation should be slow that is the meaning of stiffness, you go on increasing the load value but the deflection is less so here.

### Deflection in Stiffness:

It is load to produce per unit deflection that is in order to produce a deflection of 1 mm. How much load should be applied that is in terms of Newton or if it is in terms of kilo Newton, then again to produce a deflection of 1 mm how much load in kilo Newton should be applied so that is the meaning of stiffness and it is mostly considered in the design of Springs.

So a very important property that while we are designing the Springs we will be considering the property of stiffness and here I can say that stiffness is given by the formula your stiffness. I'll denote it by K and that is equal to load which is W upon deflection as Delta.