Identify Strain Distribution on Glass Material with Polariscope

For many years, glass is used as a structural building material. Structural calculations on glass are conservative as the strength is quite uncertain. The strength of glass can range from 20 MPa to 150 MPa. This is caused by flaws, which are not visible to the human eye. So, it is difficult to predict glass strength. The glass materials are used for making packaging products like glass containers and bottles. These products are mainly demanded by industries due to its non-reactive nature. It is the choice of many industries like the pharma industry, chemical manufacturing unit, processed food manufacturing plant, etc.

Glass material breaks easily and due to this problem of internal strain, they show volatility in its behaviour. The glass bottles that are poor in quality and get damaged and breakdown easily without any external force exerted on it and such damages can retain in itself for long without any sound of cracking. These stress cannot be seen with unaided eyes and are major cause for future breakage. To avoid such product failures, the packing material must be tested before the production process using a Polariscope Reference for Glass.

The quality assurance program must be conducted using an efficient testing procedure. Some of the known defects are ridges and furrows in the glass material. These are some defects which are identified easily with unaided eyes. These defects are identified under the category of external defects. There are also some internal strains and stress that are produced due to inefficient manufacturing process. These are air bubbles, uneven thickness etc.

The main reason for setting a flaw detection system is the continuous contraction and expansion that occurs in the glass material due to the modifying environmental conditions. When glass items are transmitted to overseas locations, they experience a sudden change from extremely cold region to extremely hot region. Due to this reason, the glass materials create stress distribution on any area of the glass which can be difficult to identify without taking help from a machine.

Polariscope works on the optical property of birefringence. This phenomenon creates a stressed transparent or translucent material like plastic or glass to show a characteristic range of colors when seen through polarised light. When properly interpreted, photoelastic colors indicates both the magnitude and direction of residual stresses.

Polariscope Strain Viewer is available in various models such as large, small modular instruments that are free-standing, installed on a wall, on a table top or even on a production line.

To get the best price for Pacorr’s Polariscope Strain Viewer, Contact our support team.