Effects of ply clustering in laminated composite plates under low-velocity impact loading

Abstract

Please cite this article as: González, E.V., Maimí, P., Camanho, P.P., Lopes, C.S., Blanco, N., Effects of ply clustering in laminated composite plates under low-velocity impact loading, Composites Science and Technology (2010), doi: 10.1016/j.compscitech.2010 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.Effects of ply clustering in laminated composite plates under low-velocity impact loading AbstractThis paper presents a study of the effects of ply clustering on polymer-based laminated composite plates subjected to a drop-weight impact loading. The tools used to define the impact configurations, as well as the experimental results obtained, are described in detail.These tools are simplified analytical models for the description of the impact behavior and of the damage thresholds that result in a significant reduction on the structure stiffness and strength, caused by delamination. The results obtained demonstrate that the analytical tools are useful to define the impact configurations, to obtain a preliminary understanding of the effects of each parameter that can influence the response, and to interpret the experimental results. It is concluded that ply clustering reduces the damage resistance of the structure.However, the damage tolerance assessed by the compression after impact tests is unaffected by ply clustering.

Comparative experimental analysis of the effect caused by artificial and real induced damage in composite laminates

“…Another important aspect to consider is the influence of the boundary conditions of the test device. This observation is in agreement with previous published studies Pérez et al (2014); Gonzàlez et al (2011).…”

Effect of tow-drop gaps on the damage resistance and tolerance of Variable-Stiffness Panels

“…F d represents the initial value at which a significant change in the stiffness properties is detected. Its value is also associated with the development of a first significant delamination [29]. After this point, the response is affected by a large variety of damage mechanisms -matrix cracking, fiber-matrix interface debonding, delamination and fiber breakage.…”

“…By reducing the mismatch angles between the adjacent layers, the response is improved in terms of smaller indentation, less damage dissipated energy, delaminations and higher residual strength. In addition, even for laminates with good stiffness properties, the clustering of plies can lead to large delaminations because there are less potential interfaces for delaminations, resulting in a lower damage resistance of the structure [29].…”

Bamboo Bundle Corrugated Laminated Composites (BCLC). Part II. Damage Analysis under Low Velocity Impact Loading

“…The impact is a serious and complex phenomenon, because invisible damage of various kinds occurs easily in composites. Four principle types of damage in composite materials generally occur, i.e., matrix cracking, fiber-matrix interface debonding, delamination, and fiber breakage (Soutis and Curtis 1996;González et al 2011). Together these failures can have a deleterious effect on the mechanical and physical properties of the composites.…”

“…Together these failures can have a deleterious effect on the mechanical and physical properties of the composites. Furthermore, impact behavior depends on many parameters, including structure (shape, thickness, stacking sequence, density, material properties, and boundary conditions), impact (velocity, impact angle, shape, size, and mass), and environment (temperature and relative humidity) (Fu et al 2010;González et al 2011). Hence, a full understanding of the impact damage mechanisms and impact behavior is essential to the design of a novel corrugated structure manufactured using bamboo bundle.…”