Stress

Stress

Stress is the internal restoring force developed per unit area when a body is deformed.

### Formula

$$Stress=\frac{F}{A}$$

### Terminologies

- F → Normal force acting on body.

- A → Cross-sectional area.

### SI Unit

$$Nm^{-2}=Pascal$$

### Dimensions

$$[Stress]=[ML^{-1}T^{-2}]$$

### Types of Stress

### Longitudinal Stress

$$\sigma=\frac{F}{A}$$

### Bulk Stress

$$P=\frac{F}{A}$$

### Shear Stress

$$\tau=\frac{F}{A}$$

### Usage

- Used to study strength of materials.