Abstract
Abstract This paper investigated the response and residual compression properties of honeycomb sandwich structures subjected to single quasi-static indentation (QSI) and repeated QSI (RQSI). The damage depth after repeated low-velocity impact (LVI) was considered as the governing parameter during the QSI experiments. Three-dimensional digital image correlation method was applied to determine deformation of the front panels after LVI and QSI to describe damage to honeycomb structures. For specimens with the same depth, it is found that the residual strength of QSI was less than that of LVI and close to that of RQSI. Results indicated that it is more reasonable to describe the damage by volume than by depth.
Highlights
Honeycomb sandwich structures have extensively been used in engineering applications, such as aerospace, automotives, and ships because of their remarkable properties like high strength/stiffness-to-weight ratio, excellentNumerous studies have focused on experimental and analytical investigations on the dynamic response of sandwich structures subjected to low-velocity impact (LVI) [7]
An extensive experimental investigation was undertaken to determine the response and residual compression properties of honeycomb sandwich structures subjected to single QSI (SQSI) and repeated quasi-static indentation (QSI) (RQSIs) as well as the LVI
Two issues need to be addressed more comprehensively: (1) ongoing deformation process during the SQSI and RQSI and (2) residual compression properties of honeycomb sandwich structures subjected to the SQSI and RQSI
Summary
Honeycomb sandwich structures have extensively been used in engineering applications, such as aerospace, automotives, and ships because of their remarkable properties like high strength/stiffness-to-weight ratio, excellent. Numerous studies have focused on experimental and analytical investigations on the dynamic response of sandwich structures subjected to low-velocity impact (LVI) [7]. Residual compression and response of honeycomb sandwich structures 405 with the number of impacts [20]. Both energy absorption and energy absorption efficiency increased initially, decreased rapidly after repeated impacts with each impact energy level [21]. Based on the above finding, quasi-static loading is considered prevalent and important in studying the mechanical behaviors of sandwich structures [24]. An extensive experimental investigation was undertaken to determine the response and residual compression properties of honeycomb sandwich structures subjected to SQSI and repeated QSIs (RQSIs) as well as the LVI. The onset of damage processing and failure modes were obtained from the strain distributions and digital images
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