Abstract
Mosquitoes are extraordinary in their ability to penetrate the epidermis layer into human skin with a natural ultimate microneedle without pain, named mosquito's fascicle. The mosquito usages a very small force to pierce into the skin. This force is at least four or three orders of magnitude smaller than the insertion force for a synthetic microneedle with an ultra-sharp tip to penetrate into the layer of human skin. In order to comprehend the piercing mechanism of the mosquito's fascicle into the human skin tissue, using new techniques as the variational iteration method. to analysis of elastic stability for mosquito's fascicle with the elastic foundation is conducted. Solutions for these types of problems are not a simple procedure since the equations of stability criteria are highly nonlinear. This study presents the application of the variational iteration method for obtaining the solutions for restrained mosquito's fascicle. The study proves that the variational iteration method is a very efficient and promising approach in the elastic stability analysis of specified problems. A good agreement occurs between the present results and the experimental measurements.