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Experimental investigation of high velocity oblique impact and residual tensile strength of carbon/epoxy laminates (2019)
Journal Article
Kristnama, A. R., Xu, X., Nowell, D., Wisnom, M. R., & Hallett, S. R. (2019). Experimental investigation of high velocity oblique impact and residual tensile strength of carbon/epoxy laminates. Composites Science and Technology, 182, Article 107772. https://doi.org/10.1016/j.compscitech.2019.107772

Composite components are required to be resilient against Foreign Object Damage (FOD) induced by localised high velocity impact events. Here an experimental investigation into high velocity oblique impacts and residual tensile strength of thin quasi-... Read More about Experimental investigation of high velocity oblique impact and residual tensile strength of carbon/epoxy laminates.

Deducing the R-curve for trans-laminar fracture from a virtual Over-height Compact Tension (OCT) test (2018)
Journal Article
Xu, X., Wisnom, M. R., & Hallett, S. R. (2019). Deducing the R-curve for trans-laminar fracture from a virtual Over-height Compact Tension (OCT) test. Composites Part A: Applied Science and Manufacturing, 118, 162-170. https://doi.org/10.1016/j.compositesa.2018.12.027

The R-curve for Mode I trans-laminar fracture energy in quasi-isotropic IM7/8552 carbon/epoxy laminates is here deduced numerically from a virtual Over-height Compact Tension (OCT) test. A High-fidelity Finite Element Method (Hi-FEM) using the explic... Read More about Deducing the R-curve for trans-laminar fracture from a virtual Over-height Compact Tension (OCT) test.

Thickness effect on Mode I trans-laminar fracture toughness of quasi-isotropic carbon/epoxy laminates (2018)
Journal Article
Xu, X., Paul, A., & Wisnom, M. R. (2019). Thickness effect on Mode I trans-laminar fracture toughness of quasi-isotropic carbon/epoxy laminates. Composite Structures, 210, 145-151. https://doi.org/10.1016/j.compstruct.2018.11.045

The thickness dependency of trans-laminar fracture toughness was studied in centre-notched quasi-isotropic IM7/8552 carbon/epoxy laminates with central double 0° plies with thicknesses between 1 and 8 mm. A reduction in trans-laminar fracture toughne... Read More about Thickness effect on Mode I trans-laminar fracture toughness of quasi-isotropic carbon/epoxy laminates.

Experimental determination of Through-Thickness Compression (TTC) enhancement factor for Mode II fracture energy (2018)
Journal Article
Xu, X., Wisnom, M. R., Sun, X., Rev, T., & Hallett, S. R. (2018). Experimental determination of Through-Thickness Compression (TTC) enhancement factor for Mode II fracture energy. Composites Science and Technology, 165, 66-73. https://doi.org/10.1016/j.compscitech.2018.06.012

Mode II fracture energy, GIIC, is a critical parameter for determining the propagation of delamination in composite laminates. Its value can be affected by Through-Thickness Compression (TTC) stress acting on the crack tip and here this effect has be... Read More about Experimental determination of Through-Thickness Compression (TTC) enhancement factor for Mode II fracture energy.

Predicting notched tensile strength of full-scale composite structures from small coupons using fracture mechanics (2017)
Journal Article
Xu, X., Takeda, S., Aoki, Y., Hallett, S. R., & Wisnom, M. R. (2017). Predicting notched tensile strength of full-scale composite structures from small coupons using fracture mechanics. Composite Structures, 180, 386-394. https://doi.org/10.1016/j.compstruct.2017.08.026

The initial fracture propagation within a full-scale stiffened quasi-isotropic composite panel and coupons with stringer feet under tensile loads was investigated. The specimens were made from Non-Crimp Fabric through Vacuum assisted Resin Transfer M... Read More about Predicting notched tensile strength of full-scale composite structures from small coupons using fracture mechanics.

Unification of strength scaling between unidirectional, quasi-isotropic, and notched carbon/epoxy laminates (2016)
Journal Article
Xu, X., Wisnom, M. R., Chang, K., & Hallett, S. R. (2016). Unification of strength scaling between unidirectional, quasi-isotropic, and notched carbon/epoxy laminates. Composites Part A: Applied Science and Manufacturing, 90, 296-305. https://doi.org/10.1016/j.compositesa.2016.07.019

An investigation into size effects and notch sensitivity in quasi-isotropic carbon/epoxy laminates was carried out. The purpose is to draw a complete picture of the strength scaling in unidirectional, quasi-isotropic, and notched carbon/epoxy laminat... Read More about Unification of strength scaling between unidirectional, quasi-isotropic, and notched carbon/epoxy laminates.

A numerical investigation into size effects in centre-notched quasi-isotropic carbon/epoxy laminates (2015)
Journal Article
Xu, X., Wisnom, M. R., Li, X., & Hallett, S. R. (2015). A numerical investigation into size effects in centre-notched quasi-isotropic carbon/epoxy laminates. Composites Science and Technology, 111, 32-39. https://doi.org/10.1016/j.compscitech.2015.03.001

Numerical modelling of scaled centre-notched [45/90/-45/0]4s carbon/epoxy laminates was carried out. The in-plane dimensions of the models were scaled up by a factor of up to 16. A Finite Element (FE) method using the explicit code LS-Dyna was applie... Read More about A numerical investigation into size effects in centre-notched quasi-isotropic carbon/epoxy laminates.

Scaling of fracture response in over-height compact tension tests (2014)
Journal Article
Xu, X., Wisnom, M. R., Mahadik, Y., & Hallett, S. R. (2015). Scaling of fracture response in over-height compact tension tests. Composites Part A: Applied Science and Manufacturing, 69, 40-48. https://doi.org/10.1016/j.compositesa.2014.11.002

An experimental investigation into in-plane scaled Over-height Compact Tension (OCT) [45/90/-45/0]4s carbon/epoxy laminates was carried out to study the scaling of fracture response. The dimensions of the baseline specimens were scaled up and down by... Read More about Scaling of fracture response in over-height compact tension tests.

An experimental investigation into size effects in quasi-isotropic carbon/epoxy laminates with sharp and blunt notches (2014)
Journal Article
Xu, X., Wisnom, M. R., Mahadik, Y., & Hallett, S. R. (2014). An experimental investigation into size effects in quasi-isotropic carbon/epoxy laminates with sharp and blunt notches. Composites Science and Technology, 100, 220-227. https://doi.org/10.1016/j.compscitech.2014.06.002

An experimental investigation into size effects in notched [45/90/-45/0]4s carbon/epoxy laminates is carried out. The in-plane dimensions of the quasi-isotropic laminates are scaled up by a factor of up to 8. Larger Scale 16 specimens with only their... Read More about An experimental investigation into size effects in quasi-isotropic carbon/epoxy laminates with sharp and blunt notches.