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Two-dimensional quasi-static delamination in composite laminates under Mode-I and Mode-II conditions

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Intralaminar fracture of unidirectional carbon/epoxy composite: experimental results and numerical analysis

John Botsis, Georgios Pappas

Fracture of carbon fiber reinforced polymers (CFRPs) is dominated by large scale fiber bridging which acts as a very important toughening mechanism. The objective of this paper is to investigate the intralaminar Mode I fracture in a unidirectional CFRP com ...

Elsevier2016

Bridging effects on Mixed Mode delamination: experiments and numerical simulation

Marco Borotto

Composite materials and, in particular, Carbon Fibre Reinforced Polymers (CFRP) have been well studied and developed in the past years due to their advanced mechanical characteristics. These materials are used in several different application fields, such ...

EPFL2016

Studies on large scale bridging in delamination of unidirectional and cross-ply laminates

Ebrahim Farmand Ashtiani

Delamination propagation in fibrous laminates is often accompanied by development of a damage zone, within which intact fibers bridge the crack faces that constitutes a major toughening mechanism. A direct experimental assessment of the crack closure tract ...

EPFL2016

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Fatigue delamination growth in composites is accompanied by large scale bridging (LSB) that yields important toughening effects. However, the extent of this mechanism depends on the laminate geometry rendering its modeling a challenging task. This work pre ...

Elsevier2016

An Alternative to Conventional Measurement Techniques for Evaluating Crack Propagations and Crack Width Openings

Ardalan Hosseini

In the scope of this study, the capability of particle image velocimetry (PIV) method to monitor cracking behavior of cement-based materials was investigated. Load-crack opening width curves for beam specimens were obtained both from conventional measureme ...

2016

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Large scale bridging is an important toughening mechanism in composite laminates that depends on the specimen geometry as well as the constituent materials. In this work, an iterative approach is applied to identify the effect of specimen thickness on trac ...

Elsevier2015

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The mixed-mode fatigue and fracture behaviors of adhesively-bonded pultruded glass fiber-reinforced polymer joints are presented in this chapter. These behaviors are based on experimental investigations using asymmetric mixed-mode bending specimens. In suc ...

Elsevier2015

Block and variable amplitude fatigue and fracture behavior of adhesively-bonded composite structural joints

Anastasios Vassilopoulos

The fatigue behavior of adhesively-bonded glass fiber-reinforced polymer (GFRP) joints is affected by the loading sequence. Analysis of several experimental data for composite materials and adhesively-bonded composite joints showed that the loading sequenc ...

Elsevier2015

Simulating the effect of fiber bridging and asymmetry on the fracture behavior of adhesively-bonded composite joints

Thomas Keller, Anastasios Vassilopoulos, Moslem Shahverdi

The fracture behavior of adhesively-bonded pultruded double cantilever beam specimens is studied in this chapter. The crack propagates along paths away from the symmetry plane and is accompanied by fiber bridging. Finite element models are developed to qua ...

Elsevier2015

Failure of Ceramic Composites in Non-Uniform Stress Fields

Varun Parameswaran Rajan

Continuous-fiber ceramic matrix composites (CMCs) are of interest as hot-section components in gas turbine engines due to their refractoriness and low density relative to metallic alloys. In service, CMCs will be subjected to spatially inhomogeneous temper ...

University of California Santa Barbara2014