OpenRadioss is an innovative open-source solution designed to democratize explicit dynamics simulations through accessible, high-performance tools for academia and industry. This work contributes to the ongoing collaborative efforts within the OpenRadioss community by presenting simple yet representative Smoothed Particle Hydrodynamics (SPH) models. These models serve as benchmark test cases and enable users to verify and validate code accuracy and computational performance. Considering the sensitivity of SPH methods to numerical parameters, such as kernel functions and numerical stability corrections, systematic investigation of these effects is essential. Hence, models addressing common computational mechanics scenarios—such as Bending Column, Taylor Impact, and High-Velocity Impact tests—are explored under varied numerical configurations. By comparing these configurations, the study identifies the most accurate and stable numerical setups for macro- and micro-scale impacts, providing valuable simulation support for ballistic damage analysis and needle-free injection applications.