Contribution to Guided Waves Analysis at Low Frequency in Thin Absorbing Plates with Application to the Non Destructive Testing of Paper
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Begun in 1973, the Review of Progress in Quantitative Nondestructive Evaluation (QNDE) is the premier international NDE meeting designed to provide an interface between research and early engineering through the presentation of current ideas and results focused on facilitating a rapid transfer to engineering development.
This site provides free, public access to papers presented at the annual QNDE conference between 1983 and 1999, and abstracts for papers presented at the conference since 2001.
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Abstract
The paper is a cellulose fiber base material and consequently it is heterogeneous at different scales. In addition, the paper exhibits two preferential axes of fiber orientation, from which it is easy to define the characteristics of an elementary bi-dimensional fiber network. A third axis, perpendicular to the first, corresponds to the stacking direction of individual networks. Following the example of composite layered media modeling, the paper presents three perpendicular planes of material symmetry. In other words, the paper is commonly assumed to be an orthotropic material [1]. The paper presents also various mechanical behaviors such as elasticity, viscoelasticity, non-linear elasticity. Furthermore the paper properties depend on both the temperature and the hygrometry [2]. At last, paper materials exist in the form of sheets; their thickness (100 µm on average) is very small beside their other dimensions.