Recorded Webinar: Efficient model set up for pre-stress analysis of bolted powertrain components.

Date : 30 July, 2020 


Duration: 60 Minutes

Bolted connections can be found in plenty of automotive components including powertrain, engine cylinder head, steering, wheel, seat attachments, and safety belt to mention a few. There are typically thousands of fasteners on a car. A connection failure will lead to warranty related issues. If the overall stiffness needs to be simulated, such joints can be ignored. However, the local region of the bolted connection needs to be assessed in several cases for potential safety issues.

In Finite Element Analysis (FEA), there are several ways of modeling a bolted joint. The classical approaches include the well-established 1D bolt and the method of splitting the bolt into two disjoint parts in Marc and introducing overclosure tyings. These methods either have limitations in terms of accuracy or make setting up of the model with multiple bolts time-consuming. In this webinar, the setting up of a bolt entity is explained. Marc allows users to easily perform bolt modeling using bolt model entities. The feature creates a control node automatically at a desired location. All of the elements and the control node together are used to define the bolt entity. Bolt pretension, locking and loosening in terms of a gradual release of force or displacement can be taken into account during the simulation.

Another aspect of the nonlinear simulation of a system with bolts is the definition of contact surfaces. Marc has various features including the automatic contact algorithm which makes the set-up of contacts easy for the users. In addition, in Marc 2020, for bolted assemblies, a linear contact feature that enhances the capabilities of contact for linear and quasi-linear simulations has been introduced. The primary consideration in linear contact is that displacements and rotations are very small and that the parts are initially in contact.

In this webinar, apart from the presentation, the set-up of a bolted connection assembly is shown by highlighting the various features in the Mentat user interface. A small cylinder head joint with two bolts and a larger assembly with several bolts are shown.


Speaker

Dr. Narayanan Ramanujam,
Technical Manager, MSC Software India 

Narayanan Ramanujam graduated with a Bachelors in Mechanical Engineering degree from Birla Institute of Technology and Science, Pilani. Subsequently, he obtained a Masters and Ph.D. degree in Mechanical Engineering in the year 2007 with focus in composite mechanics from State University of New York at Stony Brook. He has over 12 years of industrial experience in several industries.

He worked Goodyear Tire and Rubber Company for six years. He also worked for the simulation industry and shipbuilding industry. He joined MSC Software in 2018. He is a part of the pre-sales team, taking care of the nonlinear analysis product portfolio.


Pramod Deshpande
Solutions Architect, Advanced Technical Solutions

Pramod Deshpande has a Master's Degree from IIT, Bombay and more than 16 years of experience in the field of simulation. Pramod is an expert in nonlinear, manufacturing solutions and advanced automation projects.


Nitish Wani
Technical Specialist , Automotive solutions

Nitish Wani has an extensive experience in the field of structural, durability domain from leading Automotive OEMs, where he has worked extensively to develop various vehicle platforms.

Mr Nitish Wani currently works with various OEMs and suppliers to develop their fatigue, optimization and strutural simulation processes.

He holds a Bacholers Degree from Pune University, and has an overall experience of 9 years in field of simulation.


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