The design of adhesively joined components requires the ability to predict and model the joint response under expected operating conditions, including crash events for vehicle structures. Specifically, quantifying adhesive material damage accumulation from static and dynamic loading is essential to predict the response of bonded components in such scenarios. In this study, Vickers microhardness measurements were used as a forensic technique to quantify damage in bulk tensile samples for three structural epoxy adhesive materials: an untoughened epoxy; a toughened epoxy; and a high toughness epoxy. The samples were tested to failure over a range of strain rates (0.002–100 s−1), and hardness measurements were taken post-test along the gauge length. In general, for toughened epoxies the damage extended over much of the sample gauge length, while the un-toughened epoxy demonstrated damage localization at the failure location. The hardness data support the contention that mechanisms such as crazing and shear banding play a role in microhardness changes in toughened epoxies. Increments in strain rate led to an increase in the damage localization. Microhardness measurements were a valuable tool to quantify damage, with the limitation that the magnitude of change in hardness could be adhesive-specific, hypothesized to be related to competing damage mechanisms. The benefits of this approach include the ability to spatially quantify damage, to detect strain rate effects and to carry out measurement of damage post-test in support of constitutive modeling and failure analysis.
International Journal of Adhesion and Adhesives – Elsevier
Published: Apr 1, 2018
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera