Impact Tests
Impact tests, including the Izod and Charpy tests, are methods used to evaluate the toughness or impact resistance of materials, especially metals and polymers. These tests help assess how well a material can withstand sudden loading or impact without breaking or fracturing.
1. Izod Impact Test:
The Izod impact test is a standardized test used to measure the impact resistance of materials, particularly polymers and plastics. It is named after its inventor, Edwin Gilbert Izod. In this test, a notched or unnotched specimen of the material is clamped vertically as a pendulum swings into it. The pendulum’s energy is gradually transferred to the specimen, causing it to fracture. The energy absorbed by the material before fracture occurs is measured in joules or foot-pounds and is referred to as the Izod impact strength.
Key aspects of the Izod impact test:
The test can be conducted at various temperatures to evaluate a material’s performance under different conditions.
The notch in the specimen helps create a stress concentration point, making the test sensitive to material defects and notches.
2. Charpy Impact Test:
The Charpy impact test is another widely used method for assessing the impact resistance or toughness of materials, especially metals and alloys. It is named after its inventor, Georges Charpy. In this test, a notched or unnotched specimen is supported horizontally as a pendulum is released from a known height to strike and fracture the specimen. The energy absorbed by the specimen during fracture is measured in joules or foot-pounds and is referred to as the Charpy impact energy.
Key aspects of the Charpy impact test:
Our Facility:
- Equipment Name: Impact Tester
- Mark/Model: LLOYD, USA
- Range: Upto 500 N
- Test Standard: ASTM D 256, ISO 180