Variable stiffness material and structural concepts for morphing applications

IK Kuder, AF Arrieta, WE Raither, P Ermanni - Progress in Aerospace …, 2013 - Elsevier
Morphing, understood as the ability to undergo pronounced shape adaptations to optimally
respond to a diversity of operational conditions, has been singled out as a future direction in …

A phenomenological thermodynamic model for the chemo-responsive shape memory effect in polymers based on Flory–Huggins solution theory

H Lu, S Du - Polymer Chemistry, 2014 - pubs.rsc.org
We present a phenomenological thermodynamic model to study the constitutive relations
and working mechanism of the chemo-responsive shape memory effect (SME) in shape …

Spinodal dynamics of metastable glass transition domains in amorphous polymer towards thermomechanically tailorable shape memory effect

JY Liu, HB Lu, YQ Fu - Science China Technological Sciences, 2023 - Springer
Glass transition plays a critical role to determine the dynamic behaviors of amorphous shape
memory polymers (SMPs). However, the fundamental relationships between shape memory …

Programming of temperature-memory onsets in a semicrystalline polyurethane elastomer

N Fritzsche, T Pretsch - Macromolecules, 2014 - ACS Publications
We demonstrate that phase-segregated poly (ester urethane)(PEU) with crystallizable
switching segments of poly (1, 4-butylene adipate)(PBA) excels as high-performance …

Interfacial confinement in semi-crystalline shape memory polymer towards sequentially dynamic relaxations

J Liu, Z Xing, H Lu, YQ Fu - International Journal of Applied …, 2021 - World Scientific
Sequential glass and melting transitions in semi-crystalline shape memory polymers (SMPs)
provide great opportunities to design and generate multiple shape-memory effects (SMEs) …

An extended shoving model for dynamic fluctuation of glass transition in amorphous polymer towards cooperative shape-memory effect

J Liu, H Lu, A Elmarakbi, YQ Fu - Proceedings of the …, 2023 - royalsocietypublishing.org
Phase transition theory is a powerful approach to study shape-memory effect (SME) and
dynamic relaxation behaviour in amorphous shape-memory polymers (SMPs) undergoing …

Multifunctional poly (ester urethane) laminates with encoded information

M Ecker, T Pretsch - RSC Advances, 2014 - pubs.rsc.org
Solvent-cast films from shape memory poly (ester urethane)(PEU) containing different
weight contents of microencapsulated thermochromic pigments (T-PIGs) were prepared by …

Isogeometric configuration design optimization of shape memory polymer curved beam structures for extremal negative Poisson's ratio

MJ Choi, S Cho - Structural and Multidisciplinary Optimization, 2018 - Springer
Using a continuum-based design sensitivity analysis (DSA) method, a configuration design
optimization method is developed for curved Kirchhoff beams with shape memory polymers …

Yielding mechanisms for mechano-chemo-thermal couplings in amorphous shape memory polymer undergoing molecular entanglement

J Liu, H Lu, YQ Fu - Journal of Physics D: Applied Physics, 2021 - iopscience.iop.org
Shape memory polymers (SMPs) have good properties of recovering their original shape in
the presence of an external stimulus. However, the thermodynamic behaviors behind the …

Reversible shape morphing of a neutrally stable shell by untethered local activation of embedded Ni-Ti wires

D van der Lans… - Journal of Intelligent …, 2023 - journals.sagepub.com
This paper presents a novel shape morphing concept, which exploits neutral stability to
achieve reversible shape morphing. The concept is based on actively changing the material …