Laminated composites with a core layer sandwiched between orthogonal mechanically-prestrained laminae exhibit two weakly-coupled cylindrical shapes where each shape is influenced only by one prestrained lamina. This study investigates the domain of bistability and actuation requirements of such bistable laminated composites. An analytical model is constructed as follows: point-wise displacements and areal dimensions are scaled; strain energy and actuation work are computed using high-order displacement polynomials; and net energy is minimized using the Rayleigh-Ritz method to calculate stable shapes as a function of actuation force. Shape transition is shown to be a multi-stage phenomenon through an experimental procedure involving friction-free tensile tests and 3D motion capture. The simulated actuation energies agree with measurements within 12%. Square laminates are shown to be bistable only when the ratios of laminae prestrains are greater than 0.2. The aspect ratio limit for bistability can be improved by maximizing both prestrains while maintaining a prestrain ratio of one. It is shown that in-plane forcing requires 100 times more energy than an equivalent moment. A parametric study reveals that the composite’s performance parameters are more sensitive to the core’s thickness than its modulus; the sensitivity of actuation energy is minimal relative to that of deformation and stiffness.
Fusion Engineering and Design – Elsevier
Published: Oct 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