Post-wrinkle bifurcations in elastic bilayers with modest contrast in modulus
Post-wrinkle bifurcations in elastic bilayers with modest contrast in modulus
Anesia Auguste, Lihua Jin, Zhigang Suo, Ryan C. Hayward
Extreme Mechanics Letters
Lihua Jin's blog
Syringe-injectable electronics
Seamless and minimally invasive three-dimensional interpenetration of electronics within artificial or natural structures could allow for continuous monitoring and manipulation of their properties. Flexible electronics provide a means for conforming electronics to non-planar surfaces, yet targeted delivery of flexible electronics to internal regions remains difficult. Here, we overcome this challenge by demonstrating the syringe injection (and subsequent unfolding) of sub-micrometre-thick, centimetre-scale macroporous mesh electronics through needles with a diameter as small as 100 μm.
Mechanics of wrinkle/ridge transitions in thin film/substrate systems
Mechanics of wrinkle/ridge transitions in thin film/substrate systems
Lihua Jin, Atsushi Takei, JohnW.Hutchinson
Bifurcation Diagrams for the Formation of Wrinkles or Creases in Soft Bilayers
Subject to compression, elastic materials may undergo bifurcation of various kinds. A homogeneous material forms creases, whereas a bilayer consisting of a stiff film and a compliant substrate forms wrinkles. Here, we show several new types of bifurcation behavior for bilayers consisting of films and substrates of comparable elastic moduli. Depending on the ratios of moduli and thicknesses of the two materials, the critical strain for the onset of creases can be either smaller or larger than that for the onset of wrinkles.
The role of substrate pre-stretch in post-wrinkling bifurcations
Anesia Auguste, Lihua Jin, Zhigang Suo, Ryan C. Hayward. The role of substrate pre-stretch on post-wrinkling bifurcations. Soft Matter 10, 6520-6529(2014).
Ridge localizations and networks in thin films compressed by incremental release of large equi-biaxial substrate pre-stretch
Atsushi Takei, Lihua Jin, John W Hutchinson, Hiroyuki Fujita, Ridge localizations and networks in thin films compressed by incremental release of large equi-biaxial substrate pre-stretch, Advanced Materials, 2014, 26 (24): 4061-4067.