Evaluation of the Bauschinger Effect on a Steel Sheet Specimen Subjected to In-plane Reverse Loading Test

Introduction

From the viewpoint of reducing environmental impacts, the improvement of fuel efficiency and the extension of the driving range of electric vehicles for practical use are key factors for vehicle development. One solution that is expected to be promising is weight saving of the car body. New light-weight high-strength materials such as CFRP are attracting attention while in terms of metal materials featuring good formability, higher strength is being sought for by employing highly tensile materials. In dies manufacturing for presses, the spring-back phenomenon is an issue causing forming failures that need to be coped with by trial and error, which requires tremendous time and costs. In recent years, on the other hand, computer aided engineering (CAE) analytical technologies are utilized in various fields to simulate product designs on a computer for reducing the number of times and costs of trial production. Regarding dies manufacturing for presses, simulation is also coming to be used to predict the spring- back phenomenon in die design as an effective tool to achieve drastic cost reductions. This article presents an example of evaluating the Bauschinger effect on a 1 mm thick cold rolled steel sheet (SPCC) without buckling the sheet, using a Bauschinger effect measuring fixture.

December 3, 2018 GMT