Multiaxial Impact

Multiaxial Impact ASTM D3763, ASTM D7192, ISO 6603, ISO 7765

High Speed Impact Test: Determining Material Toughness and Energy Absorption

The High Speed Impact test is a sophisticated method used to determine the toughness and energy absorption capacity of materials during an impact event. This test is commonly used to evaluate materials that may be subjected to high-speed impact, such as in automotive or aerospace applications. By varying the speed of impact, the test can simulate actual impact values, providing valuable data for specifying appropriate materials for these applications.

The test uses an instrumented impact tester called the Instron Dynatup 9250HV, which includes a "Tup" with an impact head and load cell that provides full force and energy curves during the millisecond of impact. This data is then used to calculate numerous values related to material toughness and total energy absorption, such as maximum force, energy at maximum force, and total energy to break.

While the test can be performed at ambient temperatures, it is often necessary to evaluate materials at temperatures that simulate their intended end use environment. For example, many materials exhibit lower impact strength at reduced temperatures, making it necessary to test them in a freezer. To address this, the 9250HV includes a thermal chamber that allows testing of specimens at both elevated and reduced temperatures without the need to transfer the specimens from an oven or freezer just prior to testing. This provides better control and consistency of test results at non-ambient temperatures.

To perform the test, the specimen is clamped onto the testing platform and the crosshead, with the attached Tup, is raised to the appropriate height before being released to impact the specimen at a specified speed. A load-deflection curve is then produced. The size and shape of the specimen can vary, and the equipment is capable of testing any size or shape that will fit into the impact tester, including 4" x 4" plaques or 4" diameter disks, and even actual parts.

In addition to specifying appropriate materials for high-speed impact applications, the test is also used to evaluate the effect of secondary finishing operations or other environmental factors on plastic impact properties. Overall, the High Speed Impact test provides crucial data for designers and engineers to make informed decisions about the suitability of materials for various applications.

HIGH SPEED PUNCTURE MULTIAXIAL IMPACT ASTM D3763, ASTM D7192, ISO 6603, ISO 7765

Multiaxial impact testing is a critical method for evaluating the performance of composite materials, which are widely used in various industries, including aerospace, automotive, and sports equipment. This type of testing assesses the impact resistance of composite materials under different loading conditions, providing valuable insights into material behavior and potential failure modes.

The testing process involves subjecting composite material specimens to a series of impacts from different directions and at varying energy levels, replicating real-world scenarios where materials may encounter multiple impacts. The multiaxial impact testing method aims to simulate these scenarios, allowing engineers and materials scientists to assess the material's response and durability.

The data obtained from multiaxial impact testing can be used to determine the material's toughness, fracture behavior, and failure mechanisms. These results are essential for understanding the material's performance in specific applications and for developing optimized designs and manufacturing processes.

One of the benefits of multiaxial impact testing is its ability to detect damage or failure modes that may not be apparent in traditional uniaxial impact testing. By subjecting the material to impacts from different directions, multiaxial testing can reveal hidden flaws or weaknesses in the material that could cause premature failure under real-world conditions.

Multiaxial impact testing can also be used to evaluate the effectiveness of different composite manufacturing techniques, such as layup orientation and the use of reinforcements. By varying these parameters, we can determine their impact on the material's performance and identify the optimal manufacturing approach for specific applications.

Multiaxial impact testing is a critical method for evaluating composite material performance, providing valuable insights into the material's response to different loading conditions and potential failure modes. The data obtained from these tests can inform material selection, design, and manufacturing decisions, ultimately leading to improved product performance and durability.