Publications de Moslem Shahverdi

Mixed-mode quasi-static fracture behavior of GFRP/balsa sandwiches

Thomas Keller, Anastasios Vassilopoulos, Moslem Shahverdi

EPFL - CCLab Composite Construction Laboratory2018

Feasibility of iron-based shape memory alloy strips for prestressed strengthening of steel plates

Elyas Ghafoori, Moslem Shahverdi, Ardalan Hosseini, Masoud Motavalli

Iron-based shape memory alloys (Fe-SMAs) are advanced materials that can be used as prestressing elements for strengthening and rehabilitation of civil structures. In this paper, the results of a feasibility study on the application of shape memory effect ...

2017

Fracture mechanics-based progressive damage modelling of adhesively bonded fibre-reinforced polymer joints

Thomas Keller, Anastasios Vassilopoulos, Roohollah Sarfaraz Khabbaz, Moslem Shahverdi, Aida Cameselle Molares

A quasi-static progressive damage model for prediction of the fracture behaviour and strength of adhesively bonded fibre-reinforced polymer joints is introduced in this paper. The model is based on the development of a mixed-mode failure criterion as a fun ...

Wiley2017

Mixed-Mode I/II fracture behavior of asymmetric composite joints

Thomas Keller, Anastasios Vassilopoulos, Moslem Shahverdi

The partitioning of the total strain energy release rate, G(tot), into the Mode I, G(I), and Mode II, G(II), components is challenging, especially in asymmetric cracks. Although many researchers have studied the fracture behavior of composite materials und ...

Elsevier Science Bv2016

Analytical model of asymmetrical mixed-mode bending test of adhesively bonded GFRP joint

Anastasios Vassilopoulos, Moslem Shahverdi

This paper presents new analytical model of asymmetric mixed-mode bending (MMB) specimen of adhesively bonded pultruded GFRP joints. An easily applicable relationship for the calculation of the strain energy release rate of the asymmetric MMB specimens is ...

2015

Analytical modeling of mixed-Mode bending behavior of asymmetric adhesively bonded pultruded GFRP joints

Anastasios Vassilopoulos, Moslem Shahverdi

This paper presents a semi-analytical methodology for the fracture mechanics assessment of asymmetric adhesively bonded composite joints. The method is based on the classical lamination theory, the simple beam theory and the extended global method. Experim ...

Elsevier2015

Analytical model of asymmetrical Mixed-Mode Bending test of adhesively bonded GFRP joint

Anastasios Vassilopoulos, Moslem Shahverdi

This paper presents new analytical model of asymmetric mixed-mode bending (MMB) specimen of adhesively bonded pultruded GFRP joints. An easily applicable relationship for the calculation of the strain energy release rate of the asymmetric MMB specimens is ...

2015

MODELING THE PROGRESSIVE DAMAGE OF ADHESIVELY BONDED JOINTS

Thomas Keller, Anastasios Vassilopoulos, Roohollah Sarfaraz Khabbaz, Moslem Shahverdi

A quasi-static progressive damage model based on the fracture mechanics approach was developed for adhesively-bonded pultruded glass fiber-reinforced polymer (GFRP) joints. The model comprises the implementation in a numerical algorithm of a mixed-mode fra ...

2014

Mixed-mode quasi-static failure criteria for adhesively-bonded pultruded GFRP joints

Thomas Keller, Anastasios Vassilopoulos, Moslem Shahverdi

The strain energy release rates of adhesively-bonded pultruded GFRP joints were determined experimentally. The crack propagated in the adherend along paths outside the symmetry plane accompanied by fiber bridging. A new method, designated the "extended glo ...

Elsevier2014

Mixed-Mode I/II fracture behavior of asymmetric adhesively-bonded pultruded composite joints

Thomas Keller, Anastasios Vassilopoulos, Moslem Shahverdi

The mixed-mode fracture behavior of adhesively-bonded pultruded glass fiber-reinforced polymer joints was experimentally investigated using asymmetric mixed-mode bending specimens. The crack propagated along paths outside the symmetry plane and, therefore, ...

Elsevier2014

Mixed-mode fatigue failure criteria for adhesively-bonded pultruded GFRP joints

Thomas Keller, Anastasios Vassilopoulos, Moslem Shahverdi

The behavior of adhesively-bonded pultruded GFRP joints under cyclic loading was experimentally investigated. Three specimen types were examined: double cantilever beam, end load split, and mixed-mode bending specimens for Mode I, Mode II, and mixed-Mode I ...

Elsevier2013

Mixed-Mode Static and Fatigue Failure Criteria for Adhesively-Bonded FRP Joints

Moslem Shahverdi

Fiber-reinforced polymer (FRP) composites are increasingly used in many load-bearing structures. Joints are the most critical structural elements as they often become the weak links in engineering structures. Bonding and bolting are two of the main joini ...

EPFL2013

Modeling effects of asymmetry and fiber bridging on Mode I fracture behavior of bonded pultruded composite joints

Thomas Keller, Anastasios Vassilopoulos, Moslem Shahverdi

The fracture behavior of adhesively-bonded pultruded double cantilever beam specimens was experimentally investigated. The pultruded adherends comprised two mat layers on each side with a roving layer in the middle. An epoxy adhesive was used to form the d ...

Elsevier2013

Experimental investigation of R-ratio effects on fatigue crack growth of adhesively-bonded pultruded GFRP DCB joints under CA loading

Thomas Keller, Anastasios Vassilopoulos, Moslem Shahverdi

A series of fatigue experiments was performed in order to investigate the effect of the R-ratio on the fatigue/fracture behavior of adhesively-bonded pultruded GFRP double cantilever beam joints. Constant amplitude fatigue experiments were carried out unde ...

Elsevier Sci Ltd2012

A total fatigue life model for the prediction of the R-ratio effects on fatigue crack growth of adhesively-bonded pultruded GFRP DCB joints

Thomas Keller, Anastasios Vassilopoulos, Moslem Shahverdi

A new phenomenological fatigue crack growth formulation for the modeling and the prediction of the Model fatigue behavior of adhesively-bonded pultruded glass fiber-reinforced polymer double cantilever beam joints under different R-ratios is introduced. Th ...

Elsevier2012

A phenomenological analysis of Mode I fracture of adhesively-bonded pultruded GFRP joints

Thomas Keller, Anastasios Vassilopoulos, Moslem Shahverdi

The fracture behavior of adhesively-bonded pultruded joints was experimentally investigated under Mode I loading using double cantilever beam specimens. The pultruded adherends comprised two mat layers on each side with a roving layer in the middle. An epo ...

Elsevier2011