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Multiscale Approach to the Mechanical Behavior of Woven Fiber Reinforced Ceramic Matrix Composites

发布时间: 2010-04-19 09:44 | 【 【打印】【关闭】

SEMINAR

Multiscale Approach to the Mechanical Behavior of Woven Fiber Reinforced Ceramic Matrix Composites

Speaker:

Prof. Jacques Lamon

CNRS/Institute of Applied Science MATEIS Laboratory

Lyon, FRANCE

时间:2010 年 4 月 19 日(星期一)下午 3:30

地点:2号楼607会议室

联系人:董绍明研究员

曾宇平研究员

张国军研究员

欢迎广大科研人员和研究生参与讨论!

Abstract:

Ceramic matrix composites (CMCs) are very attractive materials for structural applications at high temperatures. However, they exhibit a lot of features, which result from a heterogeneous and complex microstructure. The 2D woven CMCs like the SiC-matrix ones display a multiple length scale structure (from millimetre to micrometer) and they involve ceramic constituents that are sensitive to size effects and stochastic fracture in terms of initiation and location of cracks. Furthermore, they contain dissimilar constituents with comparable or contrasting properties. Stress-induced damage plays a significant role in the potential use of Ceramic Matrix Composites as structural components. It involves matrix cracking and it depends on several factors including length scale, loading conditions, mechanical properties of constituents and composite structure. Multifilament tows represent a fundamental entity in textile composites. They progressively carry the load as the matrix is damaged, and they control the composite ultimate failure. Multifilament tows are elastic and damage tolerant.

Microstructure/properties relations are therefore of primary importance with a view to designing high-performance materials as well as components. For these reasons, a multiscale approach has been employed for several years for the investigation of CMCs including Carbon and SiC matrix composites. This approach is based on experimental work and it involves modelling of mechanical behavior at successive length scales. This approach is discussed in the present paper.

EMPLOYMENT HISTORY
From 01/2010

Director of Research, CNRS (National Centre of Scientific Research), France

Group leader: Durability of Materials.

National Institute of Applied Science, MATEIS Laboratory, Lyon, France

06/99 – 01/2010 

Director of Research, CNRS (National Centre of Scientific Research), France

Group leader: ThermoMechanical Behaviour of Fibre-Reinforced Ceramics and Carbon

        Laboratory for Composite Materials (LCTS), University of Bordeaux.

Professor at the University of Bordeaux (France);

Consultant for Snecma Company.

01/85 – 05/89   

Project Leader, Battelle Institute, Geneva Research Centre (Switzerland): Fracture of ceramics and fibre-reinforced ceramics.

Consultant for Rhône Poulenc Company.

02/82 – 12/84   

Research Scientist, Ecole Nationale Supérieure des Mines de Paris (School of Mines), University of Paris, France. Fracture of ceramics and fibre-reinforced ceramics.

Consultant for Renault Company.     

01/81 – 01/82  

Visiting Scientist, University of Berkeley, California, Ceramics Group of Prof. A. G. Evans. Fracture of ceramics.

01/79 – 12/80   

Researcher, Ecole Nationale Supérieure des Mines de Paris (School of Mines), University of Paris, France.

Fracture of ceramics and fibre-reinforced ceramics.

EDUCATION

12/78: Ph. D. in Materials Science, Ecole Nationale Supérieure des Mines de Paris (School of Mines), University of Paris, France.

06/74: M.S., Science and Engineering, Ecole Nationale Superieure des Mines de Saint

Etienne ( School of Mines), France.

06/71: B.S., Mathematics & Physics, Lycée Pierre de Fermat, Toulouse, France.

AWARDS
1989: Seymour Cray Award (Seymour Cray Co., Switzerland) for research work on failure prediction and computer code for ceramics design.

2006: Fellow of the American Ceramic Society

2007: First Prize of Best Paper Awards (American Ceramic Society)