• The instant technology disclosure refers to the detailed outline of the apparatus, methodology, and outcomes of high strain rate tensile testing, contributing valuable insights in the fields of Materials Science And Engineering.

Apparatus Description:

• Explanation of the key components, such as the drop mass tower, guide rods, hoist, and dynamic load cell.
• Details on the fixture design, including the first and second moving discs, fixed discs, and holders for securing the test specimen.

Methodology:

• Step-by-step procedures for conducting high strain rate tensile testing using the disclosed apparatus.
• Description of how the drop mass is released at different heights to achieve varying strain rates. Insights in the measurements taken, including impact velocity & load-time history.

Materials Tested:

• Identification of materials subjected to testing, such as epoxy or glass/epoxy composites.
• Other polymer-reinforced composites or metals, broadening the applicability of the technology.
• Mention of the strain rates applied during the experiments, providing a context for results.

Results and Observations:

• Addressing the need for understanding material behavior under high-speed impacts, especially in industries like automotive and aerospace.
• Presentation of findings from the experiments, including stress-strain responses and changes in material properties under different strain rates.
• Highlighting the apparatus’s ability to reveal differences in material behavior under dynamic and quasi-static conditions, crucial for comprehensive analysis.

Discussion on Tensile Properties:

• Interpretation of the observed trends in tensile modulus, tensile strength, and failure strain at varying strain rates.
• Possible explanations for the observed changes, such as the influence of the viscoelastic nature of the polymeric matrix.