New power active filter with simple low cost structure without tuned filters

2002 ◽  
Author(s):  
G.H. Jung ◽  
G.H. Cho
Keyword(s):  
Low Cost ◽  
Active Filter ◽  
Cost Structure

Small Footbridges: 2 Contexts, 2 Responses

2021 ◽  
Author(s):  
Vincent Servais ◽  
Christophe Peigneux
Keyword(s):  
Reinforced Concrete ◽  
High Performance ◽  
Low Cost ◽  
Cost Structure ◽  
Urban Site ◽  
Weathering Steel ◽  
Fibre Reinforced Concrete ◽  
Design Technique ◽  
High Performance Fibre ◽  
Minimalist Conception

<p>This paper presents the design of two small footbridges in two different sites and economical contexts. The first footbridge, located in an urban site, is an arch made of Ultra-High-Performance Fibre-Reinforced Concrete (UHPFRC). The design technique combines the use of a contemporary material with the reappropriation of ancestral methods. The second footbridge, located in a remarkable natural site and made of weathering steel, presents both a tie-arch and truss structure. This minimalist conception leads to a “low- cost” structure.</p>

Tensile and Shear Properties of Stitched Laminates in Hygrothermal Environment

2006 ◽  
Vol 326-328 ◽  
pp. 1753-1756
Author(s):  
Tao Huang ◽  
Gui Qiong Jiao ◽  
Ting Ting Xu
Keyword(s):  
Composite Laminates ◽  
Room Temperature ◽  
Damage Tolerance ◽  
Low Cost ◽  
Initial Crack ◽  
Cost Structure ◽  
National Standards ◽  
Temperature Environment ◽  
Fracture Appearance ◽  
Hygrothermal Environment

Stitched laminates is a low-cost structure panels with carbon fiber face sheets, and through-the-thickness Kevlar stitching. Through-the thickness stitching is proposed to increase the interlaminar strength and damage tolerance of composite laminates. Tensile and shear experiment of stitched laminates at room temperature and in hygrothermal environment was carried out according to corresponding national standards. Experiment results indicate that the tensile and shear modulus and strength were much reduced by the stitching, especially in hygrothermal environment. Micrographs of fracture appearance showed that the exist of resin-rich area is the source of crack both in normal room temperature environment and hygrothermal environment. It is concluded that hygrothermal environment and initial crack in resin-rich area were prime reason for performance lost of stitched laminates.

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