Effect of the stress concentration factor on the final fracture zone of aluminium AW 6063 T6 for rotating bending specimens

Strzelecki, Przemysław; Wachowski, Marcin

doi:10.1016/j.mtcomm.2022.103766

Cited by 4 publications

(1 citation statement)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Though the research conducted is based on the load that displaces the arm when the vehicle is at rest, random vibration analysis can be performed, and the obtained response equations can be applied as a load spectrum with different amplitude loading to partially resemble realtime loading conditions [3]. Through these simulations, the vibrational fatigue experienced by the component can be evaluated [4].…”

Section: Introductionmentioning

confidence: 99%

Numerical estimation of the influence of pre-induced micro-cracks in the stress concentration zone on the SIFs of a lower suspension arm

SOLOMON¹,

Griškevičius²

2023

mech

View full text Add to dashboard Cite

Structural steel is ductile in nature, this is the reason it is used in most of the Sectors in the manufacturing industry. Despite its structural strength, it faces compelling and challenging failures due to unstable, fatigue, dynamic and shock loads. This research study evaluates the structural response on one of these loading conditions using the finite element method. The design of a lower suspension arm of an automobile is modelled in Solidworks 2020 and is solved for static elastic conditions in Ansys 2021 R1. A set of pre-induced fractures are then integrated into the computational model in the Stress concentration zones in different parts of the body and solved independently. A total of five micro-cracks are induced with each crack consisting of six contours. For the numerical simulation of lower suspension arm, real-time loading conditions must be attained to resemble real-world loading scenario. Hence, 4 modes of solving were chosen which would depict the real-world failure scenario where the suspension lower arm can attain maximum loads. The maximum load values are estimated in each mode and is integrated into the model with predefined boundary conditions for the computational approach. A detailed numerical comparative conclusion is drawn regarding the SIFs of every mode and the crack that pertains maximum crack propagation rate.

show abstract

Section: Introductionmentioning

confidence: 99%

Numerical estimation of the influence of pre-induced micro-cracks in the stress concentration zone on the SIFs of a lower suspension arm

SOLOMON¹,

Griškevičius²

2023

mech

View full text Add to dashboard Cite

show abstract

Simulation of heavy-duty crankshaft sub-dynamics and experimental study of wear mechanisms

Zhu,

Cong,

Yuan

et al. 2023

Materials Today Communications

View full text Add to dashboard Cite

Effect of Pre-Existing Micro-Defects on Cutting Force and Machined Surface Quality Involved in the Ball-End Milling Repairing of Flawed KDP Crystal Surfaces

et al. 2022

View full text Add to dashboard Cite

When serving in extremely high-power laser conditions, KH2PO4 (KDP) surfaces are susceptible to incur laser damage points (also known as defects). Using micro-ball end milling cutters to repair and remove the pre-existing damage points on the flawed KDP crystal surface is the most effective method to control the growth of laser damage points on KDP crystal surfaces and prolong their service life. However, there are various forms of micro-defects (such as pits, scratches and brittle fractures) around the laser damage points on KDP crystal surfaces which possess remarkable effects on the micro-milling repair process and consequently deteriorate the repair quality. In this work, combined with nano-indentation experiments, elastic–plastic mechanics and fracture mechanics theory, a constitutive model considering the anisotropic property of KDP crystals and a three-dimensional (3D) finite element model (FEM) were established to simulate the cutting force and surface topography involved in the ball-end milling repairing of flawed KDP crystal surfaces. Besides, the micro-milling experiments were conducted to evaluate the change of cutting force and machined surface quality in the presence of micro-defects with various feed rates. The results show that micro-defects would induce the fluctuation of cutting force and a change of the undeformed cutting thickness (UCT) in the process of repairing the damage points on the crystal surface, which would lead to the brittle–ductile transition (BDT) and affect the machined surface quality. The machined surface quality was found to be deteriorated by the pre-existing micro-defects when the UCT was small (the UCT was less than 375 nm). On the contrary, brittle mode cutting in the local area can be transformed into ductile mode cutting, resulting in an improvement of repaired surface quality that is exhibited by the cutting force and microtopography. This work has great theoretical significance and engineering practical value for the promotion and application of micro-milling repairing technology in the practical manufacturing and operation of KDP optics applied to high-power laser systems.

show abstract

Effect of the stress concentration factor on the final fracture zone of aluminium AW 6063 T6 for rotating bending specimens

Cited by 4 publications

References 56 publications

Numerical estimation of the influence of pre-induced micro-cracks in the stress concentration zone on the SIFs of a lower suspension arm

Numerical estimation of the influence of pre-induced micro-cracks in the stress concentration zone on the SIFs of a lower suspension arm

Simulation of heavy-duty crankshaft sub-dynamics and experimental study of wear mechanisms

Effect of Pre-Existing Micro-Defects on Cutting Force and Machined Surface Quality Involved in the Ball-End Milling Repairing of Flawed KDP Crystal Surfaces

Contact Info

Product

Resources

About