All Outputs (46)

Friction and heat partition coefficients in incremental sheet forming process (2024)
Journal Article
Qin, Z., Gatea, S., & Ou, H. (2024). Friction and heat partition coefficients in incremental sheet forming process. Journal of Manufacturing Processes, 124, 503-523. https://doi.org/10.1016/j.jmapro.2024.06.015

To understand the thermo-mechanical behaviour in incremental sheet forming (ISF), it is important to precisely determine the interfacial and thermal-relevant parameters including coefficient of friction (COF) and heat partition coefficient (HPC), and... Read More about Friction and heat partition coefficients in incremental sheet forming process.

Spindle speed effect on the ISF processing of materials with different thermal conductivities (2024)
Presentation / Conference Contribution
Qin, Z., Gatea, S., & Ou, H. Spindle speed effect on the ISF processing of materials with different thermal conductivities. Presented at 27th International ESAFORM Conference on Material Forming (ESAFORM 2024), Toulouse, France

Incremental sheet forming (ISF) is an advanced forming technology with high flexibility and excellent adaptability. However, conventional ISF encounters challenges in processing of hard-to-deformed materials at room temperature. To address this probl... Read More about Spindle speed effect on the ISF processing of materials with different thermal conductivities.

Experimental testing and numerical modelling of ductile fracture of PEEK in incremental sheet forming process (2024)
Presentation / Conference Contribution
Gatea, S., & Ou, H. Experimental testing and numerical modelling of ductile fracture of PEEK in incremental sheet forming process. Presented at 27th International ESAFORM Conference on Material Forming (ESAFORM 2024), Toulouse, France

This research investigates the use of Hooputra-based damage model to predict fracture of polyether-ether-ketone (PEEK) material and its application to single point incremental forming (SPIF) process under different conditions. Flat PEEK sheets are us... Read More about Experimental testing and numerical modelling of ductile fracture of PEEK in incremental sheet forming process.

A new hybrid stretch forming and double-layer two-point incremental sheet forming process (2024)
Journal Article
Zhao, X., & Ou, H. (2024). A new hybrid stretch forming and double-layer two-point incremental sheet forming process. Journal of Materials Research and Technology, 30, 3485-3509. https://doi.org/10.1016/j.jmrt.2024.04.093

This research presents a new hybrid stretch forming and double-layer two-point incremental sheet forming
(hybrid stretch forming and DL-TPIF). The novelty of the proposed hybrid process is first to employ double-layer
blank sheets in the conventi... Read More about A new hybrid stretch forming and double-layer two-point incremental sheet forming process.

Heat-assisted friction stir incremental sheet forming of thermoplastics (2024)
Journal Article
Zhu, H., & Ou, H. (2024). Heat-assisted friction stir incremental sheet forming of thermoplastics. Journal of Materials Processing Technology, 328, Article 118396. https://doi.org/10.1016/j.jmatprotec.2024.118396

Incremental sheet forming (ISF) has been attracting increasing interests for customised manufacture of thermoplastics, but the application in high-performance and hard-to-form thermoplastics is still a challenge. This paper develops a new heat-assist... Read More about Heat-assisted friction stir incremental sheet forming of thermoplastics.

A new flexible multi-point incremental sheet forming process with multi-layer sheets (2023)
Journal Article
Zhao, X., & Ou, H. (2023). A new flexible multi-point incremental sheet forming process with multi-layer sheets. Journal of Materials Processing Technology, 322, Article 118214. https://doi.org/10.1016/j.jmatprotec.2023.118214

In this research, a new flexible multi-point incremental sheet forming process with multi-layer sheets (F-MPIF-MLS) was proposed. The novelty of this new forming process is demonstrated by two specific aspects of contribution. The first is the develo... Read More about A new flexible multi-point incremental sheet forming process with multi-layer sheets.

Modelling of Stress Evolution and Its Effect on Formability in Tension Under Cyclic Bending Plus Compression (2023)
Presentation / Conference Contribution
Peng, W., & Ou, H. (2023, September). Modelling of Stress Evolution and Its Effect on Formability in Tension Under Cyclic Bending Plus Compression. Presented at 14th International Conference on the Technology of Plasticity, Cannes, France

Single point incremental forming (SPIF) and Double-sided incremental forming (DSIF) are two main variants of incremental sheet forming (ISF) processes. Tension under cyclic bending (TCB) have been developed as a means for experimental evaluation and... Read More about Modelling of Stress Evolution and Its Effect on Formability in Tension Under Cyclic Bending Plus Compression.

A new analytical model for force prediction in incremental sheet forming (2023)
Journal Article
Zhu, H., & Ou, H. (2023). A new analytical model for force prediction in incremental sheet forming. Journal of Materials Processing Technology, 318, Article 118037. https://doi.org/10.1016/j.jmatprotec.2023.118037

A new analytical model for forming force prediction in the whole process of incremental sheet forming (ISF) is presented in this work. The modelling of contact region, thickness distribution and strain components are carried out as the basis for the... Read More about A new analytical model for force prediction in incremental sheet forming.

Micromechanical Modeling of the Deformation and Damage Behavior of Al6092/SiC Particle Metal Matrix Composites (2023)
Journal Article
Gatea, S., Jwad, T., Chen, F., & Ou, H. (2023). Micromechanical Modeling of the Deformation and Damage Behavior of Al6092/SiC Particle Metal Matrix Composites. Journal of Materials Engineering and Performance, 32, 10680-10701. https://doi.org/10.1007/s11665-023-07907-4

To enhance the performance and design of metal matrix composites, it is extremely important to gain a better understanding of how the microstructure influences the deformation and damage behavior of metal matrix composites under different loading con... Read More about Micromechanical Modeling of the Deformation and Damage Behavior of Al6092/SiC Particle Metal Matrix Composites.

Deformation mechanisms and fracture in tension under cyclic bending plus compression, single point and double-sided incremental sheet forming processes (2022)
Journal Article
Peng, W., & Ou, H. (2023). Deformation mechanisms and fracture in tension under cyclic bending plus compression, single point and double-sided incremental sheet forming processes. International Journal of Machine Tools and Manufacture, 184, Article 103980. https://doi.org/10.1016/j.ijmachtools.2022.103980

This study investigates the deformation and fracture mechanisms of two testing methods, tension under cyclic bending (TCB) and tension under cyclic bending plus compression (TCBC) and their relationship to single point (SPIF) and double-sided (DSIF)... Read More about Deformation mechanisms and fracture in tension under cyclic bending plus compression, single point and double-sided incremental sheet forming processes.

Hybrid vacuum-robotic forming of reinforced composite laminates (2022)
Journal Article
Elkington, M. P., Mistry, P. J., Johnson, M. S., & Ou, H. (2023). Hybrid vacuum-robotic forming of reinforced composite laminates. Journal of Reinforced Plastics and Composites, 42(11-12), 611-623. https://doi.org/10.1177/07316844221135211

A methodology is presented to implement robotic actuators into diaphragm forming of composite laminates. This Hybrid Vacuum-Robotic (HyVR) process is specifically targeted to prevent ‘bridging’ type defects. Examples are presented of successfully for... Read More about Hybrid vacuum-robotic forming of reinforced composite laminates.

Heat generation, plastic deformation and residual stresses in friction stir welding of aluminium alloy (2022)
Journal Article
Salih, O. S., Ou, H., & Sun, W. (2023). Heat generation, plastic deformation and residual stresses in friction stir welding of aluminium alloy. International Journal of Mechanical Sciences, 238, Article 107827. https://doi.org/10.1016/j.ijmecsci.2022.107827

The interactions among thermal history, plastic deformation and residual stresses in the friction stir welding (FSW) process under different welding parameters have been widely considered a crucial issue and still not fully understood. In the present... Read More about Heat generation, plastic deformation and residual stresses in friction stir welding of aluminium alloy.

Coupled quantitative modeling of microstructural evolution and plastic flow during continuous dynamic recrystallization (2022)
Journal Article
Chen, F., Tian, X., Wu, G., Zhu, H., Ou, H., & Cui, Z. (2022). Coupled quantitative modeling of microstructural evolution and plastic flow during continuous dynamic recrystallization. International Journal of Plasticity, 156, Article 103372. https://doi.org/10.1016/j.ijplas.2022.103372

Continuous dynamic recrystallization (cDRX) dominates microstructural evolution during the hot working of metallic materials with high stacking fault energy (SFE), such as aluminum alloys. However, in reality, a lack of quantitative and visual modeli... Read More about Coupled quantitative modeling of microstructural evolution and plastic flow during continuous dynamic recrystallization.

Numerical and experimental investigation of formability in incremental sheet forming of particle-reinforced metal matrix composite sheets (2022)
Journal Article
Gatea, S., Tawfiq, T. A. S., & Ou, H. (2022). Numerical and experimental investigation of formability in incremental sheet forming of particle-reinforced metal matrix composite sheets. International Journal of Advanced Manufacturing Technology, 120(3-4), 1889-1900. https://doi.org/10.1007/s00170-022-08881-2

Aluminium matrix composites (AMCs) have a high strength-to-weight ratio, high stiffness, and good damage resistance under a wide range of operating conditions, making them a viable alternative to traditional materials in a variety of technical applic... Read More about Numerical and experimental investigation of formability in incremental sheet forming of particle-reinforced metal matrix composite sheets.

Constitutive modelling of hot deformation behaviour of metallic materials (2021)
Journal Article
Zhu, H., & Ou, H. (2022). Constitutive modelling of hot deformation behaviour of metallic materials. Materials Science and Engineering: A, 832, Article 142473. https://doi.org/10.1016/j.msea.2021.142473

The complexity of hot deformation behaviours of metallic materials is acknowledged in decades of study. The present work uses a new constitutive model by Zhu-Ou-Popov (ZOP model) and its modifications to predict the hot deformation behaviours of meta... Read More about Constitutive modelling of hot deformation behaviour of metallic materials.

PEEK based cranial reconstruction using thermal assisted incremental sheet forming (2021)
Journal Article
Chen, L.-F., Chen, F., Gatea, S., & Ou, H. (2022). PEEK based cranial reconstruction using thermal assisted incremental sheet forming. Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, 236(6-7), 997-1004. https://doi.org/10.1177/09544054211045904

Compared to conventional sheet forming operations, incremental sheet forming (ISF) is a flexible forming technique that can achieve higher formability in terms of localized deformation. Due to excellent mechanical properties and X-ray penetration, po... Read More about PEEK based cranial reconstruction using thermal assisted incremental sheet forming.

Multiscale modeling of discontinuous dynamic recrystallization during hot working by coupling multilevel cellular automaton and finite element method (2021)
Journal Article
Chen, F., Zhu, H., Chen, W., Ou, H., & Cui, Z. (2021). Multiscale modeling of discontinuous dynamic recrystallization during hot working by coupling multilevel cellular automaton and finite element method. International Journal of Plasticity, 145, Article 103064. https://doi.org/10.1016/j.ijplas.2021.103064

Discontinuous dynamic recrystallization (dDRX) is considered an effective way to obtain fine grain microstructures during hot working of materials with low-to-medium stacking fault energy (SFE). However, to date, investigation and modeling of dDRX in... Read More about Multiscale modeling of discontinuous dynamic recrystallization during hot working by coupling multilevel cellular automaton and finite element method.

Surface roughness analysis of medical grade titanium sheets formed by single point incremental forming (2021)
Journal Article
Gatea, S., & Ou, H. (2021). Surface roughness analysis of medical grade titanium sheets formed by single point incremental forming. International Journal of Advanced Manufacturing Technology, 114, 2975–2990. https://doi.org/10.1007/s00170-021-07056-9

Single point incremental forming (SPIF) process has proven benefits in terms of formability, flexibility, and low cost as compared to conventional sheet forming, although it has some issues such as dimensional accuracy and low quality of surface fini... Read More about Surface roughness analysis of medical grade titanium sheets formed by single point incremental forming.

A new phenomenological constitutive model for thermoplastics (2021)
Journal Article
Zhu, H., Ou, H., & Popov, A. (2021). A new phenomenological constitutive model for thermoplastics. Mechanics of Materials, 157, Article 103817. https://doi.org/10.1016/j.mechmat.2021.103817

A new phenomenological constitutive model is proposed to predict the mechanical behaviour of thermoplastics in the current research. The new constitutive model and the method to determine the parameters of the model are introduced. In the new model,... Read More about A new phenomenological constitutive model for thermoplastics.

Incremental sheet forming of thermoplastics: a review (2020)
Journal Article
Zhu, H., Ou, H., & Popov, A. (2020). Incremental sheet forming of thermoplastics: a review. International Journal of Advanced Manufacturing Technology, 111, 565-587. https://doi.org/10.1007/s00170-020-06056-5

Incremental sheet forming (ISF) is a promising flexible manufacturing process, which has been tested in sheet forming of various metallic materials. Although ISF based forming of thermoplastics is relatively new, it has drawn considerable interests a... Read More about Incremental sheet forming of thermoplastics: a review.