@Article{cmes.2020.09099,
AUTHOR = {Meijuan Shan, Libin Zhao, Wei Huang, Fengrui Liu, Jianyu Zhang},
TITLE = {Effect Mechanisms of Hygrothermal Environments on Failure of Single-Lap and Double-Lap CFRP-Aluminum Bolted Joints},
JOURNAL = {Computer Modeling in Engineering \& Sciences},
VOLUME = {123},
YEAR = {2020},
NUMBER = {1},
PAGES = {101--127},
URL = {http://www.techscience.com/CMES/v123n1/38486},
ISSN = {1526-1506},
ABSTRACT = {The high demands for load-carrying capability and structural efficiency of
composite-metal bolted joints trigger in-depth investigations on failure mechanisms of the
joints in hygrothermal environments. However, few studies have been presented to exhaustively reveal hygrothermal effects on the failure of CFRP-metal bolted joints, which
differ from CFRP-CFRP or metal-metal bolted joints because of the remarkably different
material properties of CFRPs and metals. In this paper, hygrothermal effects on tensile failures
of single-lap and double-lap CFRP-aluminum bolted joints were experimentally and
numerically investigated. A novel numerical model, in which a hygrothermal-included
progressive damage model of composites was established and elastic-plastic models of metals
were built, was proposed to predict the failures of the CFRP-metal bolted joints in hygrothermal
environments and validated by corresponding experiments. Different failure mechanisms of
single-lap and double-lap CFRP-aluminum bolted joints, under 23°C/Dry and 70°C/Wet
conditions, were revealed, respectively. It follows that both the collapse failures of the
single-lap and double-lap bolted joints were dominated by the bearing failure of the CFRP
hole laminate in the two conditions, indicating that the hygrothermal environment did not
change the macro failure modes of the joints. However, the hygrothermal environment
considerably shortened the damage propagation processes and reduced the strength of the
joints. Besides, the hygrothermal environment weakened the load-transfer capability of the
single-lap joint more severely than the double-lap joint because it aggravated the secondary
bending effects of the single-lap joint obviously.},
DOI = {10.32604/cmes.2020.09099}
}