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A New Damage Index to Monitor the Range of the Penetration Process in Thick Laminates by Giovanni Belingardi; Maria Pia Cavatorta; Davide Salvatore Paolino is a Engineering article available to read on EtoBox.

What is A New Damage Index to Monitor the Range of the Penetration Process in Thick Laminates about?

A damage variable (damage degree DD) representing the ratio between the absorbed energy and the impact energy was introduced in 1998 by Belingardi and Vadori to assess damage accumulation caused by low velocity impacts. More recently, repeated impact tests carried out on thick laminates pointed out the significance and extent of the penetration process in thick laminates, which the DD is unable to monitor as, by definition, it reaches the value of one at penetration to remain unchanged over the entire penetration process. In the present paper, a new damage variable (damage index DI) is proposed to overcome shortcomings of the DD with respect to thick laminates. By introducing the displacement of the impactor into the definition of the DI, the depth of the penetration process is taken into account. Normalization by the displacement of the quasi-static perforation test allows for a non-dimensional damage variable which is shown to reach the value of one at perforation. Validity of the approach is proven against impact data obtained for different fibre-matrix architectures and laminate thickness. Results show that the DI can effectively differentiate between penetration and perforatio

Who reads A New Damage Index to Monitor the Range of the Penetration Process in Thick Laminates?

Author

Giovanni Belingardi; Maria Pia Cavatorta; Davide Salvatore Paolino

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0266-3538)

Published

2008

Language

EN

Field

Engineering (Physical Sciences)