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Dr Christopher York

Profile
Publications
Supervision
Teaching

Senior Lecturer (Infrastructure and Environment)

telephone: 01413304345
email: Christopher.York@glasgow.ac.uk

personal website: http://userweb.eng.gla.ac.uk/christopher.york/

Biography

I gained a first in Civil Engineering in 1990 and completed a PhD in Structural Engineering in 1993; both at the University of Wales, Cardiff.

Following a two-year period of post-doctoral research at the University of Wales, Cardiff, investigating structural optimisation methodologies for application to lightweight air-vehicle design, I joined the University of Edinburgh in 1995 as a Lecturer in Civil Engineering.

My continuing research interests in lightweight structures attracted me to Glasgow in 2001: the only institution in Scotland delivering an Aeronautical Engineering degree program, thus offering an opportunity to engage in research led teaching.

An industrial secondment with BAE Systems in 2004, involving structural optimisation studies for the future Joint Strike Fighter, provided the catalyst that gave rise to my current research interests in the thermo-mechanical behaviour of coupled laminated composite materials.

Research Interests

Research interests in laminated composite materials at the University of Glasgow focus specifically on the characterisation and behaviour of structural laminates, particularly with respect to buckling and vibration response. These activities are associated with Computational mechanics: simulation and modelling and Computational material science research within the Infrastructure and Environment division of the school of engineering.

Current research activities are focused on the development of a unified approach to the characterisation of coupled laminated composites involving: algorithm development for identification and characterisation of coupled laminate stacking sequence configurations, the vast majority possessing unique forms of mechanical coupling behaviour not previously identified; critical assessments of the benefits, or otherwise, to a wide range of functional and/or structural material applications and; development of laminate benchmark configurations, with properties exhibiting behaviour similar to conventional (metallic) materials, and against which all unique forms of laminate behaviour, arising from isolated and combined mechanical coupling effects, are being characterised.

Recent discoveries include twenty-four unique classes of mechanically coupled laminate.
One new laminate class possesses in-plane coupling behaviour only, i.e. extension-shearing coupling. Such laminates can be configured to produce bending-twisting coupling in wing-box type structures, which can be exploited to great effect in the design for passive load alleviation in wind-turbine blades, or for aero-elastic compliance in helicopter rotor-blades. Similar behaviour can also be achieved by using less sophisticated designs, such as applying off-axis material alignment to otherwise balanced and symmetric laminates, but additional forms of coupling behaviour arise in these cases, leading to detrimental effects on both stiffness and strength.
Other exotic forms of mechanical coupling have also been newly discovered, and contrary to long held misconceptions, a surprisingly broad range of these designs can be manufactured without the undesirable warping distortions that generally result from the high temperature curing process. Such laminate designs may be described as Hygro-Thermally Curvature-Stable (HTCS) or warp-free and are likely to become an import enabling technology in future ‘smart’ structures.

PhD opportunities in mechanics of composite materials are available within the Aerospace Sciences and Infrastructure and Environment research divisions.

Expertise

Buckling and Vibration analysis of prismatic and skewed repetitive aerospace panel structures.
Minimum mass design of composite panel structures subject to buckling and material strength constraints.
Tailoring of Thermo-Mechanical behaviour in Laminated Composite Materials.

List all by: Type | Date

Jump to: 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2006 | 2004 | 2003 | 2002 | 2001

Number of items: 38.

2013

York, C.B. (2013) Tapered hygo-thermally curvature-stable laminates with non-standard ply orientations. Composites Part A: Applied Science and Manufacturing, 44 . pp. 140-148. ISSN 1359-835X (doi:10.1016/j.compositesa.2012.08.023)

Shamsudin, M.H., Chen, J., and York, C.B. (2013) Bounds on the Compression Buckling Strength of Hygro-Thermally Curvature-Stable Laminate with Extension-Twisting Coupling. International Journal of Structural Integrity . ISSN 1757-9864 (In Press)

2012

Baker, N., Butler, R., and York, C.B. (2012) Damage tolerance of fully orthotropic laminates in compression. Composites Science and Technology, 72 (10). pp. 1083-1089. ISSN 0266-3538 (doi:10.1016/j.compscitech.2011.09.010)

York, C.B. (2012) Extension-twist coupled laminates for aero-elastic compliant blade design. In: 53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, 23-26 April 2012, Honolulu, Hawaii.

York, C.B., and Kennedy, D. (2012) Application of Quasi-Homogeneous Anisotropic Laminates in Grid-stiffened Panel Design. In: 53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, 23 - 26 April 2012, Honolulu, Hawaii.

Li, D., and York, C.B. (2012) Natural frequency prediction for laminated rectangular plates with extension-bending or extension-twisting and shearing-bending coupling. In: 1st International Conference on Mechanics of Nano, Micro and Macro Composite Structures, 18-20 June 2012, Torino, Italy.

Shamsudin, M., Chen, J., and York, C.B. (2012) Buckling response of hygro-thermally curvature-stable laminates with extension-twisting coupling. In: 1st International Conference of the International Journal of Structural Integrity, 25-28 June 2012, Porto, Portugal.

Shamsudin, M., and York, C.B. (2012) Thermo-mechanical behaviour of balanced plain weave laminates. In: Aerotech IV Conference on Recent Advances in Aerospace Technology, 21-22 Nov 2012, Kuala Lumpur, Malaysia.

York, C.B. (2012) Coupled quasi-homogeneous anisotropic laminates. In: 17th International Conference on Mechanics of Composite Materials, 28 May - 1 June 2010, Jurmala, Latvia.

2011

Shamsudin, M.H., Rousseau, J., Verchery, G., and York, C.B. (2011) Experimental validation of the mechanical coupling response for hygro-thermally curvature-stable laminated composite materials. In: 6th International Conference "Supply on the wings" in conjunction with AIRTEC 2011, International Aerospace Supply Fair, 2-4 November 2011, Exhibition Center, Frankfurt / Main, Germany.

Baker, N., Butler, R., and York, C.B. (2011) Maximizing compression after impact strength of uncoupled symmetric and non-symmetric laminates. In: 52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, 4-7 April 2011, Denver, Colorado.

Rhead, A., Butler, R., and York, C.B. (2011) Damage tolerance of asymmetric fully orthotropic laminates in compression. In: 11th Deformation and Fracture of Composites and 5th Structural Integrity and Multi-Scale Modelling Conference, 12-15 Apr 2011, Cambridge, UK.

Rousseau, J., Verchery, G., and York, C.B. (2011) Experimental validation of design concepts for laminated composite materials with thermal and/or mechanical coupling response. In: 11th Deformation and Fracture of Composites and 5th Structural Integrity and Multi-Scale Modelling Conference, 12-15 Apr 2011, Cambridge, UK.

York, C.B. (2011) КВАЗИОДНОРОДНЫЕ ОРТОТРОПНЫЕ СЛОИСТЫЕ КОМПОЗИТЫ С ИЗГИБНО-МЕМБРАННЫМ ВЗАИМОДЕЙСТВИЕМ. КВАЗИОДНОРОДНЫЕ ОРТОТРОПНЫЕ СЛОИСТЫЕ КОМПОЗИТЫ С ИЗГИБНО-МЕМБРАННЫМ ВЗАИМОДЕЙСТВИЕМ, 47 (4). pp. 579-606.

York, C.B. (2011) Coupled quasi-homogeneous orthotropic laminates. Mechanics of Composite Materials, 47 (4). pp. 405-426. ISSN 0191-5665 (doi:10.1007/s11029-011-9219-5)

York, C.B. (2011) Hygro-thermally curvature-stable laminates with non-standard ply orientations. In: 18th International Conference on Composite Materials, 21-26 Aug 2011, Jeju Island, South Korea.

York, C.B. (2011) Unified approach to the characterization of coupled composite laminates: Hygro-thermally curvature-stable configurations. International Journal of Structural Integrity, 2 (4). pp. 406-436. ISSN 1757-9864 (doi:10.1108/17579861111183920)

2010

York, C.B. (2010) A unified approach to the characterization of coupled composite laminates: benchmark configurations and special cases. Journal of Aerospace Engineering, 23 (4). 219-242 . ISSN 0893-1321 (doi:10.1061/(ASCE)AS.1943-5525.0000036)

York, C.B. (2010) Design concepts for laminated composite materials with thermal and/or mechanical coupling response. In: 1st EASN Association Workshop on Aerostructures, 7 - 8th September 2010, Serenes, Paris, France.

Weaver, P.M., O’Donnell, M.P., and York, C.B. (2010) Approximations for warp free laminate configurations. In: 51st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 12 - 15 April 2010 , Orlando, Florida.

York, C.B., and Weaver, P.M. (2010) Balanced and symmetric laminates – new perspectives on an old design rule. In: Proc. 51st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 12 - 15 April 2010 , Orlando, Florida. .

York, C.B. (2010) Coupled quasi-homogeneous orthotropic laminates. In: 16th International Conference on Mechanics of Composite Materials, 24-28 May 2010, Riga, Latvia.

2009

York, C.B. (2009) Approximations for fully isotropic laminate configurations (coupled laminate derivatives). In: 17th International Conference on Composite Materials, 27 - 31st July 2009, Edinburgh, Scotland.

York, C.B. (2009) Characterization of non-symmetric forms of fully orthotropic laminates. Journal of Aircraft, 46 (4). pp. 1114-1125. ISSN 0021-8669 (doi:10.2514/1.32938)

2008

York, C.B. (2008) Approximations for fully isotropic laminate configurations. In: 26th Congress of International Council of the Aeronautical Sciences, 14-19 Sept 2008, Anchorage, Alaska.

York, C.B. (2008) On composite laminates with extensional anisotropy. In: 49th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, 7 -10 April 2008, Schaumburg, Illinois.

York, C.B. (2008) Stacking sequences for extensionally isotropic, fully isotropic and quasi-homogeneous orthotropic laminates. In: 49th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, 7 -10 April 2008, Schaumburg, Illinois.

2007

York, C.B. (2007) Buckling interaction in regular arrays of rigidly supported composite laminated plates with orthogrid, isogrid, and anisogrid planform. Journal of the American Helicopter Society, 52 (4). pp. 343-359. ISSN 0002-8711

York, C.B. (2007) Characterization of ply mixing rules for non-symmetric forms of fully orthotropic laminates. In: 48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, 23-26 April 2007, Honolulu, Hawaii.

2006

York, C.B. (2006) Buckling analysis and minimum-mass design procedures for composite wing-box structures. Journal of Aircraft, 43 (2). pp. 528-536. ISSN 0021-8669

2004

York, C.B. (2004) Natural frequency response of rigid cellular supported composite plates. In: 24th International Congress of the Aeronautical Sciences, 29th August - 3rd September, Yokohama, Japan.

York, C.B., and Kennedy, D (2004) Minimum mass design of composite wing box structures incorporating syntactic core fibre replacement. In: 6th World Congress on Computational Mechanics with 2nd Asian-Pacific Congress on Computational Mechanics, 5th - 10th September, Beijing, China.

2003

York, C.B. (2003) Buckling interaction in regular arrays of distorted hexagonal plates. Aeronautical Journal, 107 (1074). pp. 461-468. ISSN 0001-9240

2002

Huyton, P.B., and York, C.B. (2002) Buckling of skew plates with planform taper. In: 43rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 22-25 April 2002, Denver, Colorado.

2001

Huyton, P, and York, C.B. (2001) Buckling of skew plates with continuity or rotational edge restraint. Journal of Aerospace Engineering, 14 (3). pp. 92-101. ISSN 0893-1321 (doi:10.1061/(ASCE)0893-1321(2001)14:3(92))

Huyton, P., and York, C.B. (2001) Wing panel geometry and implications for design. In: 2nd International Conference on Advanced Engineering Design, 24-26 June 2001, Glasgow.

York, C.B. (2001) Elastic buckling interaction in regular arrays of distorted composite hexagonal plates. In: American Helicopter Society Hampton Roads Chapter, Structure Specialists' Meeting, 30th October - 1st November, Williamsburg, VA,USA.

York, C.B. (2001) Elastic buckling interaction in regular arrays of thin polygonal plates. In: 42nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, 16-19 April 2001, Seattle,WA,USA.

This list was generated on Fri May 3 17:21:18 2013 BST.

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