CALIBRATION OF CHABOCHE KINEMATIC HARDENING MODEL PARAMETERS BY OPTIMISATION

Year 2024, , 354 - 372, 27.12.2024

Alişan Araslı , İlyas Kacar

https://doi.org/10.55071/ticaretfbd.1449025

Abstract

Drag links are used in the automotive industry mostly, and during painting, their ends are protected against paint by two types of cap productions. While one is machined, the other is cold formed. In this study, a finite element simulation for the deformation process of a drag link’s cap made from St52 alloy is performed. For the plasticity model, Chaboche’s nonlinear kinematic hardening rule is used with the associated flow rule and Von Mises yield criterion. Chaboche’s parameters are determined by low cycle fatigue test by applying curve fitting methods to one hysteresis loop. Furthermore, the Chaboche model parameters are calibrated by the optimization process. The final diameters of the cap measurements are compared with those obtained from the optimized model. Therefore, a comprehensive methodology is presented for the determination and calibration of Chaboche kinematic hardening model parameters. Chaboches calibrated parameters are YS=370,73 MPa, C=3513,5 MPa, and =47,958 while their initial values are YS=360 MPa, C=3500 MPa, and =90.

Keywords

Chaboche model, kinematic hardening, optimization, low cycle fatigue, Cold forming, plasticity

CHABOCHE KİNEMATİK PEKLEŞME MODELİ PARAMETRELERİNİN OPTİMİZASYON İLE KALİBRE EDİLMESİ

Abstract

Rot kolu çoğunlukla otomotiv endüstrisinde kullanılmakta ve boyama sırasında uçları iki tip kapak üretim yöntemiyle boyaya karşı korunmaktadır. Bunlardan biri talaşlı imalat, diğeri ise soğuk şekillendirmedir. Bu çalışmada, St52 alaşımından yapılmış bir rot kolunun kapağının deformasyon işlemi için bir sonlu elemanlar simülasyonu gerçekleştirilmiştir. Plastisite modelini oluşturmak için Chaboche'nin doğrusal olmayan kinematik pekleşme kuralı, ilişkili akış kuralı ve Von Mises akma kriteri kullanılmıştır. Chaboche parametreleri, bir histerezis döngüsüne eğri uydurma yöntemleri uygulanarak düşük çevrimli yorulma testi ile belirlenmiştir. Ayrıca, Chaboche model parametreleri optimizasyon işlemi ile kalibre edilmiştir. Kapak ölçümlerinin nihai çapları, optimize edilmiş modelden elde edilenlerle karşılaştırılmıştır. Chaboche kinematik pekleşme modelinin parametrelerinin belirlenmesi ve kalibrasyonu için kapsamlı bir yöntem sunulmuştur. Kalibre edilen Chaboche parametreleri YS=370,73 MPa, C=3513,5 MPa ve =47,958 iken başlangıç değerleri YS=360 MPa, C=3500 MPa ve =90'dır.

Keywords

Chaboche modeli, kinematik pekleşme, optimizasyon, düşük çevrimli yorulma, soğuk şekillendirme, plastisite

Supporting Institution

Ditaş Doğan Yedek Parça Imalat ve Teknik A.Ş. We

Thanks

This work was supported by Ditaş Doğan Yedek Parça Imalat ve Teknik A.Ş. We would like to thank them for their support. We would like to thank Dr. Mehmet Seyhan, Ka-radeniz Technical University for providing the opportunity to use Ansys® software for simulations for educational purpos-es. We are very grateful to the reviewers for their valuable comments, which have been utilized to improve the quality of the paper.

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