Damage micromechanisms and notch sensitivity of glass-fiber non-woven felts: An experimental and numerical study |
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Authors: | Alvaro Ridruejo Javier LLorca |
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Institution: | a Departamento de Ciencia de Materiales, Universidad Politécnica de Madrid, E. T. S. de Ingenieros de Caminos, 28040 Madrid, Spain b Instituto Madrileño de Estudios Avanzados de Materiales (Instituto IMDEA Materiales), C/ Profesor Aranguren s/n, 28040 Madrid, Spain |
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Abstract: | The deformation and damage micromechanisms of a glass-fiber non-woven felt were analyzed with a combination of experiments and simulations. Tensile tests were carried out on unnotched and notched rectangular panels to ascertain the physical phenomena which control the development of damage. It was found that fracture began by interbundle bond fracture followed by frictional sliding between bundles, leading to the localization of damage in a wide band. The mechanical behavior of the non-woven felt until final fracture was modeled by the finite element simulation of a 2D random network in which the geometric characteristics of the network and the constituent properties were obtained from experiments on the actual non-woven felt. The simulation results were in very good agreement with the experiments in terms of the macroscopic response and of the microscopic mechanisms. They contributed to explain different features of the experimental data, including the effect of specimen dimensions on the strength and the notch-insensitive behavior of the material. |
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Keywords: | Micromechanical modeling Non-woven fabrics Damage Experimental micromechanics |
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