Contact Dr Mehdi Yasaee

Areas of expertise


Dr Yasaee received his MEng degree in Mechanical Engineering in 2008 at Imperial College. He obtained his PhD from the Aerospace Department at University of Bristol in 2012, investigating the management of delamination damage in composite materials using discrete interleaving technologies.
He then joined Rolls-Royce Composites University Technology Centre (UTC) as a Research Associate where his research was focussed on the experimental characterisation of through thickness reinforced (TTR) composites under quasi-static and dynamic impact loading. In 2016, Dr Yasaee joined Cranfield University as a Lecturer in Lightweight Structures.

Current activities

Dr Yasaee's research interests include developing advanced materials for purpose of improved strength, fatigue and impact damage resistance. His expertise are in:
  • Fracture and damage analysis of composite materials
  • Hierarchical toughened damage tolerant composites
  • Dynamic impact characterisation of materials 
  • Analytical and numerical model development
  • Simulation of composite structures delamination damage and failure 
  • Functionally graded and topological optimisation of hybrid composite/metal structures
  • Advanced Materials
  • Aircraft Structure Design and Integration

Current Projects:
Powerplant Integration with Platform Systems (PIPS) program
An £8.9m joint Innovate UK and Rolls-Royce funded program with aim to investigate greater integration of the Structural, Thermal/ Fluid and Control Systems of power-plant with the airframe to achieve lighter, more fuel efficient power-plants of the future. Dr Yasaee is involved with the structures work package in PIPS which has a target of significant structural weight reduction in the wing, pylon and engine integration by systematic structural system design optimisation with extensive full scale experimental validation.

Dr Yasaee is the principal supervisor of the following PhD student:
Mr Peter Liu - PhD Title: Optimisation of composite hybrid structures
In this project a bespoke multi-material topological optimisation methodology is being developed with capability to design efficient hybrid composite/metal structures. 
The novelty of the methodology is to avoid complex geometries produced by classical topological optimisation routines. This means optimised hybrid composite/metal structures can be realised for any design space with the benefit of being cost effective to manufacture.


Rolls-Royce, plc


Articles In Journals

Conference Papers

  • Yasaee M, Mohamed M & Hallett SR (2017) Testing of z-pinned laminates with multiple delaminations. In: 20th International Conference on Compsite Materials (ICCM20), 2015, Copenhagen, 19 July 2015 - 24 July 2017.
  • M'membe B, Gannon S, Yasaee M, Hallett SR & Partridge IK (2015) Delamination resistance of composites using inclined Z-pins. In: 20th International Conference on Composite Materials (ICCM20), Copenhagen, 19-24 July 2015.
  • M'membe B, Yasaee M, Hallett SR & Partridge IK (2014) Effect of inclined insertion on the delamination resistance of Z-pinned composites. In: 16th European conference on composite materials (ECCM16), Seville, 22-26 June 2014.
  • M'membe B, Yasaee M, Hallett S & Partridge I (2014) Effect of inclined insertion on the delamination resistance of Z-pinned composites. In: 16th European conference on composite materials (ECCM16), Seville, 22 June 2014.
  • Yasaee M, Mohamed G, Allegri G & Hallett S (2014) Delamination resistance of through thickness reinforced composites. In: 16th European conference on composite materials (ECCM16), Seville, 22 June 2014.
  • Mohamed G, Helenon F, Allegri G, Yasaee M & Hallett SR (2013) Predicting the through-thickness enhancement of z-pinned composite laminates. In: 19th International Conference on Composite Materials (ICCM19), Montreal, 28 July - 2 August 2013.
  • Yasaee M, Lander JK, Allegri G & Hallett SR (2013) Characterisation of bridging mechanisms in a single z-pinned composite laminate. In: Comptest 2013 - 6th International conference on composites testing model identification, Aalborg, 22-24 April 2013.
  • McCombe GP, Yasaee M, Trask RS & Bond IP (2012) Inhibiting delaminations in fibre reinforced plastic laminates with dropped plies. In: 15th European Conference on Composite Materials (ECCM15), 2012, Venice, 24-28 June 2012.
  • Yasaee M, Bond I & Trask R (2011) Novel compartmentalisation of low velocity impact damage. In: 2nd joint US-Canada conference on composites, Montreal, 26 September 2011.
  • Malkin R, Yasaee M, Bond I & Trask R (2011) Ductility in composites: Influence of ply-cuts on the flexural behavior of carbon fibre reinforced polymer (CFRP). In: 26th annual technical conference of the American Society for Composites 2011, Montreal, 26 September 2011.