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Noninvasive measurement of local stress inside soft materials with programmed shear waves
(American Association for the Advancement of Science, 2023-03-08)Mechanical stresses across different length scales play a fundamental role in understanding biological systems¿ functions and engineering soft machines and devices. However, it is challenging to noninvasively probe local ... -
Bending control and stability of functionally graded dielectric elastomers
(Elsevier, 2021-01-18)A rectangular plate of dielectric elastomer exhibiting gradients of material properties through its thickness will deform inhomogeneously when a potential difference is applied to compliant electrodes on its major surfaces, ... -
On the thermodynamic consistency of Quasi-linear viscoelastic models for soft solids
(Elsevier, 2020-12-15)Originating in the field of biomechanics, Fung's model of quasi-linear viscoelasticity (QLV) is one of the most popular constitutive theories employed to compute the time-dependent relationship between stress and deformation ... -
Wrinkling of soft magneto-active plates
(Elsevier, 2020-11-03)Coupled magneto-mechanical wrinkling has appeared in many scenarios of engineering and biology. Hence, soft magneto-active (SMA) plates buckle when subject to critical uniform magnetic field normal to their wide surface. ... -
An ultrasonic method to measure stress without calibration: The angled shear wave identity.
(Acoustical Society of America, 2020-12-03)Measuring stress levels in loaded structures is crucial to assess and monitor structure health and to predict the length of remaining structural life. Many ultrasonic methods are able to accurately predict in-plane stresses ... -
Mechanics of human brain organoids
(American Physical Society, 2020-01-02)Organoids are prototypes of human organs derived from cultured human stem cells. They provide a reliable and accurate experimental model to study the physical mechanisms underlying the early developmental stages of human ... -
Extreme resilience and dissipation in heterogeneous elasto-plastomeric crystals
(Royal Society of Chemistry, 2023-11-07)We present a microstructure-topology-based approach for designing macroscopic, heterogeneous soft materials that exhibit outstanding mechanical resilience and energy dissipation. We investigate a variety of geometric ... -
Magnetoactive asymmetric mechanical metamaterial for tunable elastic cloaking
(Elsevier, 2024-01-08)We propose a magnetic field-induced asymmetric mechanical metamaterial for tunable transformation-based elastic cloaking. The metamaterial is designed by integrating hard-Magnetic Active Elastomers (hMAEs) and combining ... -
Post-buckling development in soft particulate composites
(Elsevier, 2023-07-26)In this paper, we investigate the post-buckling development of instability-induced patterns in soft particulate composites. Upon reaching the critical strain level, the composite experiences microstructural buckling. ... -
Instability-induced pattern formations in soft magnetoactive composites
(American Physical Society, 2020-04-14)Elastic instabilities can trigger dramatic microstructure transformations giving rise to unusual behavior in soft matter. Motivated by this phenomenon, we study instability-induced pattern formations in soft magnetoactive ... -
Structural and material electro-mechanical instabilities in microstructured dielectric elastomer plates
(Elsevier, 2022-02-18)In this paper, we investigate the stability of microstructured dielectric elastomer (DE) plates under electro-mechanical finite deformations. We examine the influence of the DE composite microstructure parameters on the ... -
Emergence of instability-driven domains in soft stratified materials
(Nature Research, 2022-05-02)Nature frequently employs the buckling phenomenon to facilitate the formation of complicated patterns across length-scales. Current knowledge, however, is limited to a small set of buckling-induced microstructure transformations ... -
Magneto-deformation and transverse elastic waves in hard-magnetic soft laminates
(Elsevier, 2022-04-28)We study the magneto-mechanical behavior of periodic laminates made of hard-magnetic active elastomers (HMAEs). We formulate the amended free-energy function for HMAEs, and derive an explicit expression for the induced ... -
Magnetic field-induced asymmetric mechanical metamaterials
(Elsevier, 2023)We propose a magnetic field-induced asymmetric mechanical metamaterial. The tunable metamaterial integrates hard-Magnetic Active Elastomers (hMAEs) into the microstructural design combining snap-through, bi-stability, and ... -
Towards understanding the role of viscoelasticity in microstructural buckling in soft particulate composites
(Elsevier, 2023)This work investigates the interplay between viscoelasticity and instabilities in soft particulate composites undergoing finite deformation. The composite is subjected to in-plane deformation at various constant strain ... -
Nonlinear elastic vector solitons in hard-magnetic soft mechanical metamaterials
(Elsevier, 2023-07-14)We propose a design of a metamaterial for magnetically tunable propagation of nonlinear vector solitary waves. The metamaterial consists of a periodic array of units of hard-magnetic inclusion embedded in a soft matrix. ... -
Size exclusion chromatography for screening yeastolate used in cell culture media
(Elsevier, 2023-09-18)Yeastolate is often used as a media supplement in industrial mammalian cell culture or as a major media component for microbial fermentations. Yeastolate variability can significantly affect process performance, but analysis ... -
Optical system of aplanatic telescope with a 100 m spherical primary mirror
(Society of Photo-optical Instrumentation Engineers, 2022-06-30)We propose an optical system of an extremely large telescope for ground-based or planetary use. The system comprises a segmented spherical mirror with a diameter of 100 m and f-number of f/1. There are three annular zones ... -
A route to 1-Deoxynojirimycin and 1-Deoxymannojirimycin derivatives with quaternary centers adjacent to the ring nitrogen from Methyl α-d-Mannopyranoside
(Wiley, 2020-02-03)6-Alkylated-8-azido-1,6-octadiene derivatives were prepared from methyl α-D-mannopyranoside. The sequence to allylic azide precursors included a Horner-Wadsworth-Emmons reaction with a concomitant epimerization that ... -
Advanced spectroscopy and APBS modeling for determination of the role of His190 and Trp103 in mouse thymidylate synthase interaction with selected dUMP analogues
(MDPI, 2021-03-06)A homo-dimeric enzyme, thymidylate synthase (TS), has been a long-standing molecular target in chemotherapy. To further elucidate properties and interactions with ligands of wild-type mouse thymidylate synthase (mTS) and ...