000			02243nam a22001577a 4500
082			_a670
100			_a Osama, Muhammad _9134537
245			_aImproving Damping of Automotive Suspension
264			_aIslamabad : _bSMME-NUST , _c2026.
300			_a76p. ; _bSoft Copy _c30cm.
500			_aMost heavy-duty automotive suspensions use high-strength helical steel springs, which have linear elastic behavior but very little intrinsic material damping. So, auxiliary hydraulic dampers are the only things that keep the vehicle stable and comfortable to ride in. In very rough off-road conditions, these fluid-based dampers are very likely to break down or lose their effectiveness due to heat, which makes armored SUVs and other strategic logistics and defense platforms very vulnerable. This study presents a new polymer-metal composite (PMC) spring topology that is meant to provide built-in passive damping and fail-safe mechanical redundancy. To do this, a high-strength SAE 9254 steel coil spring was completely covered in a thermoset neoprene (chloroprene rubber) shell. A custom compression molding workflow was created to make sure that the adhesion between the two surfaces was strong and that there was no delamination. We used a servo hydraulic universal testing machine (UTM) to test dynamic performance under cyclic loading conditions. We then added the resulting coefficients to a quarter car model on Simulink as well as 7-degree-of-freedom (7-dof) full-car vehicle dynamics model on MATLAB. Tests in the real-world show that composite architecture causes strong non-linear viscoelasticity. Transient oscillations die down quickly, according to time-domain analysis. This means that the suspension settles down much faster after a shock event. These results show that composite springs wrapped in neoprene are a theoretically long lasting, fail-safe building solution that improves dynamic stability and completely protects the structural steel core from corrosion-related fatigue.
650			_aMS Design and Manufacturing Engineering _9119567
700			_aSupervisor: Dr. Najm Ul Qadir _9134538
856			_u http://10.250.8.41:8080/xmlui/handle/123456789/57652
942			_2ddc _cTHE
999			_c617516 _d617516