Fatigue resistance evaluation of high Mn-TWIP steel through damage mechanics: A new method based on stiffness evolution

Parareda, Sergi; Casellas, Daniel; Lara, A.; Mateo, A.

doi:10.1016/j.ijfatigue.2021.106643

Cited by 7 publications

(4 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, new, robust, flexible, and easily implementable testing methods are required to determine fatigue behaviour in a fast and experimentally easy way. Recently, the authors of the present work presented the stiffness method with convincing results for TWIP steel [20]. The stiffness method monitors the damage evolution during a fatigue test through strain measurements.…”

Section: Introductionmentioning

confidence: 80%

A damage-based uniaxial fatigue life prediction method for metallic materials

et al. 2023

Self Cite

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 80%

A damage-based uniaxial fatigue life prediction method for metallic materials

et al. 2023

Self Cite

View full text Add to dashboard Cite

“…At least 15 specimens were used for each material in the staircase tests according to Dixon-Mood method [37]. Moreover, the fatigue resistance of the warm-forming materials was determined by testing 3 specimens using the stiffness method described in the reference [38]. The stepwise method consisted in increasing the maximum stress (σ max ) after a loading block of 6000 cycles.…”

Section: Fatigue Testsmentioning

confidence: 99%

Understanding the Fatigue Notch Sensitivity of High-Strength Steels through Fracture Toughness

Parareda

Frómeta

Casellas

et al. 2023

Metals

Self Cite

View full text Add to dashboard Cite

This study presents an innovative approach for selecting high-strength materials for fatigue dimensioning parts, considering both fracture toughness and fatigue performance. Warm and hot forming processes enable the construction of high-strength parts above 1000 MPa with complex geometries, making them suitable for lightweight chassis in automotive and freight applications. This research reveals that high-strength steels can experience up to a 40% reduction in fatigue performance due to manufacturing defects introduced during punching and trimming. Fracture toughness has been proposed as a good indicator of notch sensitivity, with a strong correlation of 0.83 between fracture toughness and fatigue notch sensitivity. Therefore, by combining fracture toughness measurements and fatigue resistance obtained through the rapid fatigue test, it becomes possible to quickly identify the most fatigue-resistant materials to deal with defects. Among the nine materials analysed, warm-formed steels show promising characteristics for lightweight chassis construction, with high fatigue resistance and fracture toughness exceeding the proposed fracture threshold of 250 kJ/m2.

show abstract

“…The obtained fatigue limit will be compared with results obtained by the rapid testing approach to check its accuracy. The stiffness method relies on the measurement of the fatigue damage through the determination of the specimen inelastic strains (p) after each successive fatigue block [7]. The p is then plotted against the maximum stress (max) of each block.…”

Section: Fatigue Testsmentioning

confidence: 99%

Fracture toughness to assess the effect of trimming on the fatigue behaviour of high-strength steels for chassis parts

Parareda

Frómeta

Casellas

et al. 2023

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

High-strength steels are widely used in vehicle body-in-white, offering a good balance between crashworthiness and lightweight design. The increased requirements of heavier electric vehicles, in terms of fatigue resistance and crashworthiness, highlight that chassis parts have remarkable lightweighting potential. However, applying these grades in chassis parts is not straightforward, as the forming processes, like trimming, may introduce surface defects that compromise the fatigue resistance of the component. This work presents a material selection strategy for the applicability of high-strength steels in chassis parts of electric vehicles. The proposed approach allows the evaluation of the key parameters of the chassis parts in a simple way. The crash performance is evaluated through fracture toughness using the essential work of fracture (EWF) methodology. The method is applied to thin high-strength steel sheets employing double-edge notched tensile specimens (DENT). On the other hand, fatigue performance is investigated in terms of fatigue resistance for both notched and unnotched specimens. The results for different complex-phase and dual-phase steels show a good agreement between the EWF and the fatigue notch factor. The method could help apply high-strength steel to chassis parts, as designers will have a tool to focus the expensive fatigue tests on the best material candidates.

show abstract

Fatigue resistance evaluation of high Mn-TWIP steel through damage mechanics: A new method based on stiffness evolution

Cited by 7 publications

References 58 publications

A damage-based uniaxial fatigue life prediction method for metallic materials

A damage-based uniaxial fatigue life prediction method for metallic materials

Understanding the Fatigue Notch Sensitivity of High-Strength Steels through Fracture Toughness

Fracture toughness to assess the effect of trimming on the fatigue behaviour of high-strength steels for chassis parts

Contact Info

Product

Resources

About