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Why metals break on dynamic load but not on static load of same magnitude?

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That isn't necessarily true. If the metal is under repeated dynamic loading, it becomes a matter of material fatigue and not strength. For instance, if you bend a paper clip back and forth repeatedly, it becomes easy to break. The material properties have changed (more brittle) due to the repeated dynamic load.

In the case of impact or blast loading, it is actually the opposite. Materials often have the ability to withstand much larger loads than they could statically, but for very short durations (on the scale of milliseconds).

because i said so.

Dynamic load- Any load which is nonstatic, such as a wind load or a moving live load.

Static Load - Any load, as on a structure, which does not change in magnitude or position with time
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What are static load and dynamic load?

 A static load is the effect of gravity on an object or structure.    A dynamic load is the forces that move or change when acting on a structure.    Example

What is the dead load and a live load and a dynamic load in a building?

  Dead load is the total load of all of the components of the building that generally do not change over time, such as the steel columns, concrete floors, bricks, roofing

What is dynamic loading?

  loading which cause movement of the object or structure is called dynamic loading

What is Static and dynamic loads?

static is a study of force and their effects of eullibrium. Or loads that involve gravity (if you drop something from a high spot it would feel heavier than if you placed it)

Is safe working load of rope same as breaking strain?

No. There should always be a margin between safe working load and breaking strain, in case the load is heavier than you thought, or if the rope is beginning to get a bit fraye

What is static load?

A static load is the effect of gravity on an object.

What is the difference between static load and dynamic load?

A static load is applied to remain static without any build up of energy. Example a sandbag put slowly on a floor. When the sandbag put on a cart and wheeled on the floor, it

What are electrical static and dynamic load?

The load which is not varying w.r.t time i.e fix load is known as  static whereas the load whose magnitude changes arbitrarily e.g you  switch on the light, switch off the l
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What is a static load on a chair?

the static load of a chair is 3-4 in hieght and 4-4 in width thus this equals yo moma + my balls= a hole lot of stuff all over her face