Stress Strain Curve For Metals Ceramics And Polymers

The brittle polymer red curve elastically deforms and fractures before deforming plastically.

Stress strain curve for metals ceramics and polymers. Stress strain curve is the plot of stress and strain of a material or metal on the graph. In engineering and materials science a stress strain curve for a material gives the relationship between stress and strain it is obtained by gradually applying load to a test coupon and measuring the deformation from which the stress and strain can be determined see tensile testing these curves reveal many of the properties of a material such as the young s modulus the yield strength. The stress strain curve can provide information about a material s strength toughness stiffness ductility and more. Stress strain curves for two brittle materials.

Polymers exhibit a wide range of stress strain behaviors as shown in the figure below. Stress strain curves for metals ceramics and polymers objective we are interested about studying and comparing stress strain curves of metals ceramics and polymers. Primarily differences are due to their different chemical bonding properties homework 1. After plotting the stress and its corresponding strain on the graph we get a curve and this curve is called stress strain curve or stress strain diagram.

Strain is the percent change in the length of the material. For brittle ceramics a three point bending apparatus shown in the figure below is used determine the stress strain behavior and the measurement results are used to calculate an equivalent modulus of elasticity. In this the stress is plotted on the y axis and its corresponding strain on the x axis.