Materials testing in the plastics industry often involves instrumented multi-axial puncture tests as described in the international standard ISO 6603-2 and in ASTM D3763. While in Europe, the typical fall height is one meter, which means an impact velocity of 4.4 m/s, many international specifications in the automotive industry stipulate slower speeds of 2.2 m/s, which require relatively large drop weights, as well as higher speeds of 6.6 m/s, which require a greater fall height or acceleration of the drop weight tester. Additional test types, such as instrumented Charpy, Izod, or impact tensile tests are also useful in materials development.
Composites testing often involves pre-damaging prepared test plates. The compression test that follows is called a Compression After Impact (CAI) test and is described in many national and international standards.
When examining components, the mechanical characteristics of complete assemblies or systems are tested. Familiar examples include the testing of safety gear, such as helmets, protectors, or bullet-proof vests. Often, the engineer of a component wants to validate the design in its used condition. Drop weight testers are suitable for characterizing these properties using a wide range of deformation speeds and temperatures.
Zwick Roell has been delivering quality testing systems for impact testing for years. Its product line includes pendulum impact testers for metals and plastics, drop weight testers with an energy range of only a few joules to 100,000 joules, as well as high-speed testing machines.
Based on their years of experience, Zwick will present a new product line of drop weight testers under the Amsler brand in October at testXpo 2017 – the International Forum for Materials Testing. Zwick rounds out its portfolio of impact testing for a wide range of applications with the following products:
Amsler HIT230F – The small impact tester for puncture tests and CAI tests With a maximum impact velocity of 4.4 m/s and drop weights between 2 and 23 kg, this impact tester is optimal for puncture tests to ISO 6603-2 and CAI pre-damaging to a variety of standards. It is particularly outstanding because the test area is easily accessible, test series can be performed rapidly, and tempered test plates can be inserted directly. When it comes to efficiency and ergonomics, this impact tester can't be beat.
Amsler HIT600F – The universal impact tester for materials testing Testing at low impact speeds of 2.2 m/s requires a large drop weight. If tests are performed at 6.6 m/s, acceleration is required. This drop weight tester covers both requirements, making it the perfect testing instrument for the requirements of many specification standards in the automotive industry. Just like the HIT230F, the HIT600F's feeding and safety concept is optimized for ergonomic use and safety. Simply insert pretempered test plates that are then hit in less than 5 seconds, making a temperature chamber unnecessary for many puncture tests. This impact tester can also perform CAI, Charpy, and Izod tests.
Amsler HIT1100F – One instrument for both materials and components testing Components testing can often be a challenge for an impact tester. The impact surface of the component is often not at an exact right angle to the direction of impact, which means the guides must be massive Some components must even be fixed in special grips. To facilitate this, the impact tester is equipped with a T-slot plate for easy arrangement of the tooling. If the test is performed at high or low temperatures, the entire test setup must be housed in a temperature chamber. The Amsler HIT1100F is ideal for this type of testing and, thanks to tooling designed for this purpose, can be used for a wide variety of standardized tests in materials testing.
Amsler HIT2000F – One instrument for both materials and components testing This impact tester is similar to the Amsler HIT1100F but has a greater impact height and higher impact energy.