Numerical Investigation of Pyrotechnical Initiators and Their Impact in Airbag Inflator Applications: Ballistic Modeling and Functional Analysis

A numerical model describing the ballistic behavior of a commercially used initiator is presented in this article. This was built on principle conservation mass and energy multi-phase framework incorporated with multi-loaded conditions. After obtaining information about grain size distribution each composite, fixing factor proposed based surface area ratio composites. Thus, solid propellant burning process distributed described, burn rate parameters applied pyrotechnic compositions were re-evaluated for different preconditioned temperature levels according to Vieille’s law. The influence bridge wire metal cap further modeled concerning their characteristic properties observed measurements. validation entire closed bomb test showed quantitative agreement measured pressure evolution, while parameter study evaluating sensitivity component delivered some insights into product development process. Furthermore, configuration cold gas inflator utilized evaluate impact realistic application, where shock wave intensity during deployment serves main function design. Incorporated CFD simulations capture propagation, 0D-3D coupling strategy ballistics realized. Besides, simulation results reflected physical conditions proper manner. In particular, led better understanding interactions between components, which barely possible be quantified through could also combination other mechanical principles as devices such pin-puller, electric line cutters, or airbag inflators. detailed gained enabled us assess existing design quantitatively have control quality.