Results 91 to 100 of about 63,572 (312)
Advanced Science, EarlyView.An ultralight, multilayer anisotropic tactile sensor—an artificial Pacinian corpuscle—exhibits ultrahigh tangential sensitivity (1022 kPa−1) and spatiotemporal sensing. It discriminates static, sliding, and rolling contacts, detects incipient stick–slip via high‑frequency signatures, and enhances robotic touch (100%/98.18% accuracy for active/passive ...
Jinghui Wang +12 more
wiley +1 more source
[Transformation toughening] [PDF]
, 1993 In NiAl, we have succeeded in determining the complete Ginzburg-Landau strain free energy function necessary to model the cubic to tetragonal martensite transformation in a sample of any size. We believe that this is the first time that the parameters of a Ginzburg-Landau functional and the complete strain spinodal for any three-dimensional displacive ...
openaire +2 more sources
An Elastocaloric Polymer with Ultra‐High Solid‐State Cooling via Defect Engineering
Advanced Science, EarlyView.This work reports a defect‐engineering strategy that enables a record‐high adiabatic temperature change of up to 8.14 ± 1.76 °C in elastomers at an elevated temperature above 65 °C. Combined experimental and theoretical efforts reveal that increasing dangling‐chain defects nonmonotonically impacts the elastocaloric cooling performance of polymers due ...
Zhaohan Yu +11 more
wiley +1 more source
Latin American Journal of Solids and StructuresThis work suggests a computational model that takes account of effective fibers on toughening in FRC at an early stage of crack formation. We derived the distribution of pressure provoked by a random inclined fiber in the matrix and calculated stresses ...
Chong Wang, Leandro Ferreira Friedrich
doaj +1 more source
Advanced Science, EarlyView.A CoCrFeNiTa0.4 eutectic high‐entropy alloy achieves a near‐theoretical yield strength of 2.6 GPa with 13.6% plasticity. This breakthrough stems from a hierarchical nanostructure (FCC‐Laves lamellae with L12/D022 precipitates), which alleviates the inter‐phase modulus/hardness mismatch through synergistic strengthening and toughening, guiding the ...
Yusha Luo +10 more
wiley +1 more source
Polímeros, 2012 O poli(ácido lático) é um polímero biodegradável proveniente de fontes renováveis com grande potencial para substituir polímeros não biodegradáveis provenientes do petróleo.
Gustavo F. Brito +3 more
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Plastic deformation mechanisms in polyimide resins and their semi-interpenetrating networks [PDF]
High-performance thermoset resins and composites are critical to the future growth of space, aircraft, and defense industries in the USA. However, the processing-structure-property relationships in these materials remain poorly understood. In the present
Jang, Bor Z.
core +1 more source
Fracture toughness and crack-resistance curve behavior in metallic glass-matrix composites [PDF]
, 2009 Nonlinear-elastic fracture mechanics methods are used to assess the fracture toughness of bulk metallic glass (BMG) composites; results are compared with similar measurements for other monolithic and composite BMG alloys.
Hofmann, D. C. +5 more
core +2 more sources
Advanced Science, EarlyView.A novel strategy is developed by doping reduced graphene oxide (rGO) into a (HfZrTi)C medium‐entropy ceramic. This induces a hierarchical strain modification mechanism, synergistically inhibiting crack propagation at the microscale and dissipating stress at the mesoscale.
Junyi Xiao +8 more
wiley +1 more source
Research and Application of Micro Expansion Anti Channeling Cement Slurry System in Agadem Oilfield
Shiyou jixie, 2020 In the Agadem Block of Niger, the qualified rate of cementing with three-opening liner is only 40%. The transition time of the cement slurry system UCA used in the field is 43 minutes, the expansion rate is -0.03% in 24 hours, and the channeling ...
Wang Gang +6 more
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