Concept

Crazing

Publications associées (21)

Analysis and study of novel terpolymers composed of acrylamide, mono-charged and double-charged cationic monomers

Peter Käuper, Jutta Christine Wandrey, Ricardo Losada Mateo

The composition of novel terpolymers containing acrylamide (A), acryloyloxyethyltrimethylammonium chloride (Q), and bis-1,3(N,N,N-trimethylammonium)-2-propylmethacrylate dichloride (M) was analyzed combining FTIR and potentiometric titration. Calibration w ...

2009

Correlation of microstructural and mechanical properties in particle reinforced lead-free solders

Venkatesh Sivasubramaniam

Solders are widely used as interconnect material for the electronic industry. The solder interconnect provides both electrical contact and mechanical connection between the integrated circuit devices and their substrate. Thus solders with good reliability ...

EPFL2009

Microdeformation mechanisms in rubber toughened PMMA and PMMA-based copolymers

John Christopher Plummer, Laure Dupuits Lalande

The classical method of toughening polymethylmethacrylate (PMMA) is to incorporate composite rubber particles into the homopolymer matrix. This approach has been extended in the present work by (i) combining rubber toughening with chemical modification of ...

2006

Residual stress characterization in a single fibre composite specimen by using FBG sensor and the OLCR technique

Fabiano Colpo

The purpose of this thesis is to characterize internal strains in polymeric materials due to consolidation. In view of this, optical Fiber Bragg Grating sensors are an excellent non-destructive tool for internal strain characterization and damage detection ...

EPFL2006

Microdeformation in heterogeneous polymers revealed by electron microscopy

John Christopher Plummer, Pierre Stadelmann, Laure Dupuits Lalande

Recent investigations of the tensile fracture behaviour of representative glassy and semicrystalline impact-resistant polymers are reviewed, with emphasis on the microdeformation behaviour as revealed by electron microscopy of sections from bulk specimens, ...

2004

Microdeformation mechanisms in thin films of amorphous semi-aromatic polyamides

John Christopher Plummer

Optical and transmission electron microscopy have been used to investigate the microdeformation mechanisms in thin films of amorphous semi-aromatic polyamides with different chemical structures and chain lengths. In the chosen range of test temperatures (b ...

2003

Stress-initiated void formation during cure of a three-dimensionally constrained thermoset resin

Véronique Michaud, Paul Sunderland

During cure of epoxy resins, polymerization induces an increase in mechanical properties, which is accompanied by a volumetric shrinkage. When the resin is cured in a constrained mold to which it adheres, tensile stresses will hence develop, which may exce ...

2001

Determination of the rheological properties of thermoplastic composites for compression flow molding

Paul Sunderland

The influence of the fiber mat structure and the matrix rheology on the squeeze flow behavior of thermoplastic composites for compression flow molding has been investigated. An analytical model for isothermal squeeze flow has been developed and experimenta ...

2000

Functionally graded metals and metal-ceramic composites .2. Thermomechanical behaviour

Andreas Mortensen

Following a review of the processing of functionally graded metals and metal-ceramic composites in Part 1; this Part 2 of the two part series focuses on the thermomechanical behaviour. The paper begins with an overview of the fundamentals of thermoelastic ...

1997

NUMERICAL INVESTIGATION OF POLYMER CRAZE GROWTH AND FRACTURE

William Curtin

The craze formation and failure typical of many glassy polymers have been investigated using an elastic spring network to model both bulk and crazed polymer material. The elastic properties of the network springs were modified, using simple rules, to captu ...

1995

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