This project began in 2021 when Team ME 41 was tasked with designing and fabricating a simple test rig to measure the effects of transverse vibration on bolted joints. Team ME 41 based the design on the Junker Test, a machine that simulates real-world vibrational conditions acting on a bolted joint. In 2022, Team ME 40 continued the work by identifying relationships between various bolt parameters, such as thread size, vibration amplitudes, and initial preload, and their effects on loosening. Most recently, in 2023, Team ME 37 created loosening curve models to better understand the correlation between bolt parameters and their susceptibility to loosening. This project is currently ongoing with Team ME 30 in 2024, continuing the investigation of bolted joint loosening caused by vibrations, focusing on three key objectives: 1. Increased deflection sensitivity to detect relative motion as small as 0.001”. 2. Evaluate preload loss under both transverse and axial loading to replicate real-world conditions. 3. Develop a 2D finite element analysis (FEA) model to predict deflections and assess the stiffness of the test rig.