Saturday 01 February 2025
A team of researchers has made a breakthrough in understanding how needles penetrate soft solids, like skin or tissue. Their study sheds light on the complex interplay between the needle and the material it’s piercing, and could have significant implications for medical procedures.
When a needle is inserted into a soft solid, friction and adhesion play a crucial role in determining how easily the needle moves through the material. The researchers found that at low toughness levels, adhesion dominates, while at high toughness levels, friction takes over. This means that the force required to push the needle through the material changes depending on the properties of both the needle and the material.
The team used a combination of experiments and computer simulations to investigate this phenomenon. They created a model system where a needle was inserted into a soft solid, and measured the force required to advance the needle by a certain distance. The results were then compared with theoretical predictions based on the properties of the material and the needle.
The researchers found that their model accurately predicted the experimental results, and could be used to estimate the force required to push a needle through a soft solid given its properties. This has significant implications for medical procedures such as injections or biopsies, where precise control over the penetration force is crucial.
The study also highlights the importance of considering the interfacial properties between the needle and the material it’s piercing. The researchers found that the adhesion shear stress, which is the force required to overcome the attraction between the two surfaces, plays a critical role in determining the penetration force.
This research has far-reaching implications for our understanding of soft solids and their behavior under different conditions. It could also lead to the development of new medical devices or techniques that take into account the complex interactions between needles and soft materials.
In addition to its practical applications, this study highlights the importance of interdisciplinary research, bringing together experts from fields such as biology, engineering, and materials science to tackle complex problems. The results demonstrate the power of combining theoretical models with experimental data to gain a deeper understanding of complex phenomena.
Cite this article: “Unraveling the Complex Interplay between Needles and Soft Solids”, The Science Archive, 2025.
Needle Penetration, Soft Solids, Friction, Adhesion, Toughness, Medical Procedures, Computer Simulations, Material Properties, Interfacial Properties, Biopsies.
