Drop Tower Testing
Drop Tower Testing - Related Videos
07:08
Modified Drop Tower Impact Tests for American Football Helmets
0 Views •
Cited by 5 •
2017
This article provides a novel technique to assess the performance characteristics of American football helmets by inclusion of faceguards during NOCSAE Standard drop tests. Additionally, two more impact locations are proposed to be added to the NOCSAE certification.
09:44
Laboratory Drop Towers for the Experimental Simulation of Dust-aggregate Collisions in the Early Solar System
0 Views •
Cited by 11 •
2014
We present a technique to achieve low-velocity to intermediate-velocity collisions between fragile dust aggregates in the laboratory. For this purpose, two vacuum drop-tower setups have been developed that allow collision velocities between <0.01 and ~10 m/sec. The collision events are recorded by high-speed imaging.
08:31
Place and Response Learning in the Open-field Tower Maze
0 Views •
Cited by 2 •
2015
The Open-field Tower Maze (OFTM) is a maze created to study the behavioral and neural mechanisms of spatial learning (e.g., place- or response-learning) in rats. This maze is especially useful for experimenters who want to use a non-stressful maze paradigm to investigate spatial learning in their research.
09:20
Picoinjection of Microfluidic Drops Without Metal Electrodes
0 Views •
Cited by 2 •
2014
We have developed a technique for picoinjecting microfluidic drops that does not require metal electrodes. As such, devices incorporating our technique are simpler to fabricate and to use.
01:13
Excess Pressure Inside a Drop and a Bubble
0 Views •
2023
The shape of a small drop of liquid can be considered spherical, neglecting the effect of gravity. This drop can further be considered as two equal hemispherical drops put together due to surface tension. The forces acting on the spherical drop are due to the pressure of the liquid inside the drop, the pressure due to air outside the drop, and the force due to the surface tension acting on the two hemispherical drops. where γ corresponds to the surface tension. Recalling that the force per...
FAQs
The released mass and controlled height determine the gravitational impact conditions applied to the test specimen. Keeping these variables known and repeatable allows researchers to compare responses across materials, devices, or constructs. Adjusting them changes the loading experienced during impact, helping reveal differences in structural performance, durability, injury response, or energy absorption.
Force, displacement, acceleration, and energy absorption provide complementary views of the response. Force indicates the loading transmitted to the specimen, displacement describes its movement, and acceleration captures rapid changes during impact. Energy absorption shows how much impact energy the material or device takes up, supporting evaluation of performance and possible failure behavior.
Energy absorption indicates how effectively a tested material, device, or biological construct takes in the energy delivered during impact. This measure is especially relevant when assessing protective devices, prosthetic components, or structures intended to limit damaging responses. Comparing energy absorption with force and displacement helps researchers interpret overall durability and structural performance.
A typical workflow establishes a known mass, sets a controlled release height, and releases the mass so gravity produces the impact. Sensors then record force, displacement, acceleration, and energy-related response during the event. Researchers use the resulting measurements to evaluate the specimen's behavior and compare performance under repeatable loading conditions.
Researchers can apply this method when a biomedical material or component must be evaluated under sudden loading rather than only gradual mechanical stress. Relevant targets include biomaterials, prosthetic components, protective devices, and tissue-engineered constructs. The results can inform safer designs, durability assessments, and analyses of how a system responds to real-world impacts.
The recorded impact data can identify how a biomedical system carries force, moves, accelerates, and absorbs energy during a sudden load. These observations help researchers assess structural performance and investigate failure. In bioengineering, that evidence can guide improvements to biomaterials, prosthetic components, protective devices, and tissue-engineered constructs intended to withstand impacts.