Oriented distribution structure, interaction, and performance of thermoplastic polyurethane/selective hindered amine hybrids

2010 ◽  
Vol 120 (2) ◽  
pp. 906-913 ◽  
Author(s):  
Xiuying Zhao ◽  
Daling Xiao ◽  
Sizhu Wu ◽  
Yiping Feng ◽  
Liqun Zhang ◽  
...  
Keyword(s):  
Thermoplastic Polyurethane ◽  
Structure Interaction ◽  
Distribution Structure ◽  
And Performance

scholarly journals Effects of 3D Printing-Line Directions for Stretchable Sensor Performances

Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1791
Author(s):  
Chi Cuong Vu ◽  
Thanh Tai Nguyen ◽  
Sangun Kim ◽  
Jooyong Kim
Keyword(s):  
3D Printing ◽  
Thermoplastic Polyurethane ◽  
Three Dimensional ◽  
Optimal Solution ◽  
Human Motion ◽  
Repeated Measurements ◽  
Fused Filament Fabrication ◽  
And Performance ◽  
The Times ◽  
Stretchable Sensors

Health monitoring sensors that are attached to clothing are a new trend of the times, especially stretchable sensors for human motion measurements or biological markers. However, price, durability, and performance always are major problems to be addressed and three-dimensional (3D) printing combined with conductive flexible materials (thermoplastic polyurethane) can be an optimal solution. Herein, we evaluate the effects of 3D printing-line directions (45°, 90°, 180°) on the sensor performances. Using fused filament fabrication (FDM) technology, the sensors are created with different print styles for specific purposes. We also discuss some main issues of the stretch sensors from Carbon Nanotube/Thermoplastic Polyurethane (CNT/TPU) and FDM. Our sensor achieves outstanding stability (10,000 cycles) and reliability, which are verified through repeated measurements. Its capability is demonstrated in a real application when detecting finger motion by a sensor-integrated into gloves. This paper is expected to bring contribution to the development of flexible conductive materials—based on 3D printing.

Structure and performance control of high‐damping bio‐based thermoplastic polyurethane

2021 ◽  
pp. 52059
Author(s):  
Xi Hou ◽  
Liwen Sun ◽  
Wei Wei ◽  
Darlene K. Taylor ◽  
Shengpei Su ◽  
...  
Keyword(s):  
Thermoplastic Polyurethane ◽  
Performance Control ◽  
And Performance

A stabilized ALE method for computational fluid–structure interaction analysis of passive morphing in turbomachinery

2019 ◽  
Vol 29 (05) ◽  
pp. 967-994 ◽  
Author(s):  
Alessio Castorrini ◽  
Alessandro Corsini ◽  
Franco Rispoli ◽  
Kenji Takizawa ◽  
Tayfun E. Tezduyar
Keyword(s):  
Fluid Mechanics ◽  
Interaction Analysis ◽  
Fluid Structure Interaction ◽  
Arbitrary Lagrangian Eulerian ◽  
Axial Fan ◽  
Fluid Structure ◽  
Ale Method ◽  
Structure Interaction ◽  
And Performance ◽  
Passive Morphing

Computational fluid–structure interaction (FSI) and flow analysis now have a significant role in design and performance evaluation of turbomachinery systems, such as wind turbines, fans, and turbochargers. With increasing scope and fidelity, computational analysis can help improve the design and performance. For example, it can help add a passive morphing attachment (MA) to the blades of an axial fan for the purpose of controlling the blade load and section stall. We present a stabilized Arbitrary Lagrangian–Eulerian (ALE) method for computational FSI analysis of passive morphing in turbomachinery. The main components of the method are the Streamline-Upwind/Petrov–Galerkin (SUPG) and Pressure-Stabilizing/Petrov–Galerkin (PSPG) stabilizations in the ALE framework, mesh moving with Jacobian-based stiffening, and block-iterative FSI coupling. The turbulent-flow nature of the analysis is handled with a Reynolds-Averaged Navier–Stokes (RANS) model and SUPG/PSPG stabilization, supplemented with the “DRDJ” stabilization. As the structure moves, the fluid mechanics mesh moves with the Jacobian-based stiffening method, which reduces the deformation of the smaller elements placed near the solid surfaces. The FSI coupling between the blocks of the fully-discretized equation system representing the fluid mechanics, structural mechanics, and mesh moving equations is handled with the block-iterative coupling method. We present two-dimensional (2D) and three-dimensional (3D) computational FSI studies for an MA added to an axial-fan blade. The results from the 2D study are used in determining the spanwise length of the MA in the 3D study.

scholarly journals Implications of the Observed Seismic Performance of a Pile-Supported Wharf for Numerical Modeling

2005 ◽  
Vol 21 (3) ◽  
pp. 617-634 ◽  
Author(s):  
Matthew J. Donahue ◽  
Stephen E. Dickenson ◽  
Thomas H. Miller ◽  
Solomon C. Yim
Keyword(s):  
Structural Model ◽  
Seismic Analysis ◽  
Free Field ◽  
Strong Motion ◽  
Sloping Ground ◽  
Loma Prieta Earthquake ◽  
Structure Interaction ◽  
Motion Data ◽  
And Performance ◽  
Recent Earthquakes

The seismic response and performance of pile-supported wharves on sloping ground is not well documented due to an historical lack of instrumentation on port structures. Although general surface observations have been made at numerous ports following recent earthquakes, much more specific soil foundation-structure-interaction data could have been obtained with the more widespread employment of instrumentation. This paper presents the results of empirical and numerical analyses of recorded strong-motion data (SMD) from an array of instruments located on a pile-supported wharf and in the adjacent free field. Data were recorded with an instrumentation array at Berth 24/25 at the Port of Oakland, California, during the M7.0 Loma Prieta earthquake. The primary objectives of this project were to evaluate the SMD and identify the limitations inherent in capturing the complete dynamic character, including soil structure interaction, of a pier or wharf with a structural model. The project is expected to serve the professional engineering community by providing guidance in selecting appropriate techniques for seismic analysis and subsequent upgrade of existing port facilities.

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