On the correlation between fracture toughness and crash resistance of advanced high strength steels
| Autor: | A. Lara, D. Frómeta, Jessica Calvo, C. Suppan, P. Larour, J. Rehrl, Daniel Casellas, Silvia Molas |
|---|---|
| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament d'Enginyeria Minera, Industrial i TIC, Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica, Universitat Politècnica de Catalunya. PROCOMAME - Processos de Conformació de Materials Metàl·lics |
| Předmět: |
Toughness
Materials science Metals--Fracture 0211 other engineering and technologies Crash 02 engineering and technology Crash resistance Crash tests Steel High strength Fracture toughness 0203 mechanical engineering Metalls--Fractura Acer d'alta resistència Essential work of fracture General Materials Science Enginyeria dels materials::Assaig de materials [Àrees temàtiques de la UPC] Strength of materials Axial impact tests Resistència de materials 021101 geological & geomatics engineering business.industry Mechanical Engineering Metals -- Fracture Fracture mechanics Structural engineering Enginyeria dels materials::Metal·lúrgia [Àrees temàtiques de la UPC] Cracking 020303 mechanical engineering & transports Metalls -- Fractura Mechanics of Materials Solid mechanics Fracture (geology) Crashworthiness Advanced high strength steels business |
| Zdroj: | Recercat. Dipósit de la Recerca de Catalunya instname UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) |
| Popis: | Automotive industry players have devoted large efforts to identify the material parameters governing the crash resistance of Advanced High Strength Steels (AHSS). Such knowledge is essential to improve impact performance prediction and optimize new steel development. Nevertheless, there is still an open discussion about which are the most relevant properties on AHSS crashworthiness. In this work, the authors investigate the correlation between the fracture toughness of different AHSS and their crash failure behaviour. Fracture toughness is measured in the frame of fracture mechanics, through the essential work of fracture methodology. Two fracture resistance parameters are characterized: the fracture toughness at cracking initiation, wei, and the essential work of fracture, we. Toughness values are compared with the results of axial impact tests, which are evaluated according to the energy absorbed and the cracking behaviour observed in crash boxes. Results show that fracture toughness permits to describe different crash events in terms of crack initiation and crack propagation and allows ranking AHSS impact resistance; steels with higher we present better crash performance. Therefore, fracture toughness is proposed as a key material property to predict the crash resistance of AHSS and as a relevant design parameter for crash resistant parts. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|