# Eccentric load and direct load

## Eccentric Load

**Eccentric load**– When the load whose line of action does not directly coincide with the axis of the body then it is called eccentric load. And the distance between the actual axis of the body and the point of loading is called eccentric limit. It always acts on the eccentricity (e) from the centroids of all cross- section of a body.

**’ .**

*Eccentricity is denoted by ‘e*

Eccentric load plan |

Eccentric load elevation |

**eccentricity**.

## Direct Load

**Direct load**– When the load whose line of action directly coincides with the axis of the body Then it is called an axial load and direct load. Axial load / direct load is always act on the centroids of the cross – section of a body;

Direct load plan |

Direct load elevation |

**σd**

**is denoted by direct stress**)

**Tensile load / Tensile force****Compressive load / Compressive force**

### Tensile Load

**Tensile load** – When the two equal and opposite forces pull is axially applied on a body, then it is called as tensile load / tensile force the body is subjected to tension which causes increase in the length of a body.

Tensile Force |

### Compressive Load

**Compressive load** – When the two equal and opposite forces push is axially applied on a body, then it is called as compressive load / compressive force the body is subjected to compression which causes decrease in the length of a body.

**eccentric load and direct load**term introduced as

**bending stress and direct stress**

### Bending Stress

**Bending Stress**– When the load is acting it does not coincide with the axis of the body then, the resistance per unit area is called bending stress.

**Bending stress is denoted by ( σb )**

Bending Stress |

*Bending stress*( σb ) =M/I x Y

### Direct Stress

**Direct Stress** – When the load is acting *axially *( along the axis ) then the resistance per unit area is* called **direct stress.*

Direct Stress |

*Direct stress*( σd ) = P/A N/mm sq.

*Compressive load*

#### Stress distribution diagram

**Bending stress is less then direct stress (σd > σb)**

**Bending stress is equal to the direct stress (σd = σb)**

**Bending stress is more than direct stress (σd < σb)**

*bending stress is less than direct stress*(σd > σb) than the stress throughout the section will be of the same nature i.e, compressive nature. The stress distribution diagram is shown below.

*bending stress is equal to direct stress*(σd = σb) than the stress throughout the section will be of the same nature. i.e, compressive nature. The stress distribution diagram is shown below.

(σd = σb) |

3. *If bending stress is more than direct stress* (σd < σb) then the stress will be partly tensile and partly compressive both. The stress distribution diagram is shown below.

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