Powertrain Components

Powertrain components as engines and gearboxes usually have a high number of bolted contact surfaces. These non-linear interactions between parts influence the stresses under load as well as the vibration behavior.

The example of a transfer case shows the stress distribution on the housing flange in assembled state. By including this housing as a flexible structure in a powertrain dynamic simulation, the time-dependent stresses within the housing and contact stresses can be evaluated. Based on these results, the durability of the housing and the leak-tightness can be analyzed.

A torsional damper bolted on a crank shaft is highly dynamically loaded. In areas where the contact pressure is reduced during peak-loads, fretting corrosion can be observed. During this investigation a full load run-up simulation was carried out with a crank train model including MAMBA for the contact interface between crankshaft and visco-damper. Based on the obtained results critical speeds, where the contact pressure reduces in the areas of the wear pattern, were identified.

Benefits

• Analysis of leak-tightness of bolted housings
• Evaluation of fretting corrosion due to dynamic loads
• Evaluation of full rpm range to include possible resonance effects