Anisotropic strength and stiffness properties of some UK Coal Measure siltstones

2002 ◽  
Vol 35 (2) ◽  
pp. 155-166 ◽  
Author(s):  
D.N. Whittles ◽  
E. Yasar ◽  
D.J. Reddish ◽  
P.W. Lloyd
Keyword(s):  
Coal Measure ◽  
Anisotropic Strength ◽  
Stiffness Properties ◽  
Strength And Stiffness

scholarly journals Interlocking birch plywood structures

2021 ◽  
pp. 095605992110222
Author(s):  
Chrysl A Aranha ◽  
Markus Hudert ◽  
Gerhard Fink
Keyword(s):  
High Surface ◽  
Surface Hardness ◽  
Experimental Tests ◽  
Digital Fabrication ◽  
Element Model ◽  
Component Level ◽  
Geometrical Properties ◽  
Stiffness Properties ◽  
The Face ◽  
Strength And Stiffness

Interlocking Particle Structures (IPS) are geometrically stable assemblies, usually fabricated from plate type elements that are interconnected by slotted joints. IPS are demountable and their components have the potential to be used and reused in different structures and configurations. This paper explores the applicability of birch plywood panels, which are characterized by a high surface hardness, for this type of structural system. Experimental tests were conducted to determine the mechanical properties of birch plywood plates. Moreover, IPS connections with different geometrical properties were investigated for two different load exposures: bending and rotation. The characteristics under bending exposure are influenced by the orientation of the face-veneers. For the rotational load exposure, very small strength and stiffness properties have been identified. A linear elastic finite element model is presented that shows a wide agreement with the test results. The study serves as an initial probe into the performance of IPS structures at the component level. Various aspects that are relevant for the design of IPS, such as the assembly, the accuracy and challenges regarding digital fabrication, the durability, and the structural performance are discussed.

scholarly journals Mechanical behaviour of calcareous waste under consolidated drained triaxial compression testing in saturated conditions

2019 ◽  
Vol 106 ◽  
pp. 01016
Author(s):  
Jakub Zięba
Keyword(s):  
Mechanical Behaviour ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Triaxial Compression ◽  
Soil Samples ◽  
Excess Pore Water Pressure ◽  
Stiffness Properties ◽  
Construction Purpose ◽  
Strength And Stiffness ◽  
Excess Pore

The article presents the mechanical behaviour of calcareous waste under consolidated and drained condition in Triaxial compression test (CD). The host material currently being considered for the construction purpose of several buildings in Poland. One of the location of calcareous waste is in Łagiewniki area (in Cracow) [1,2]. In this work, particular attention has been paid to the to ensure fully saturation for all the tested soil samples and avoid generation of unwanted excess pore water pressure during shearing stage. The saturation level of soil samples was estimated based on Skempton’s law (B>0.95). CD Triaxial test have been conducted in order to derive information on its strength and stiffness properties.

Optimization Design of Front Suspension Spring Cover

2012 ◽  
Vol 590 ◽  
pp. 492-495
Author(s):  
Qin Man Fan
Keyword(s):  
Topology Optimization ◽  
Shape Optimization ◽  
Optimization Model ◽  
Optimization Design ◽  
Structural Strength ◽  
Suspension Spring ◽  
Front Suspension ◽  
Original Proposal ◽  
Stiffness Properties ◽  
Strength And Stiffness

Taking the front suspension spring cover of a tractor as the research object, the ANSYS as topology optimization design platform, the minimum value of the volume of spring cover as the objective function, the strength and stiffness of the spring cover does not exceed the set value as the constraint conditions conduct topology optimization and obtained spring cover topology shape optimization model. The results showed that the optimized spring cover, while maintaining the original structural strength and stiffness properties, the new spring cover materials than the original proposal to reduce by 12.9%.

scholarly journals Sand Solidification through Microbially Induced Carbonate Precipitation for Erosion Control: Prospects in Bangladesh

2016 ◽  
Vol 9 (1) ◽  
pp. 59-61
Author(s):  
MNH Khan ◽  
S Kawasaki ◽  
MR Hassan
Keyword(s):  
Erosion Control ◽  
Precipitation Method ◽  
Carbonate Precipitation ◽  
Stiffness Properties ◽  
Microbial Carbonate ◽  
Microbial Carbonate Precipitation ◽  
Microbially Induced Carbonate Precipitation ◽  
Strength And Stiffness ◽  
Ureolytic Bacteria

Bio-cementation is a sand consolidation technology, in which ureolytic bacteria release carbonate from urea hydrolysis in the presence of an excess of calcium ions to form calcite (CaCO3) in-situ. Biocementation is to enhance the strength and stiffness properties of soil and rocks though microbial activity or products. This paper addressed the prospect of microbial carbonate precipitation for erosion control in Bangladesh. Bacterial CaCO3 precipitation under appropriate conditions is a general phenomenon where the ureolytic bacteria uses urea as an energy source and produces ammonia which increases the pH in the environment and generates carbonate, causing Ca2+ and CO32- to be precipitated as CaCO3. This CaCO3 join sand particles and forms rocklike materials that auto-repairs by means of sunlight, seawater, and bacteria as microbially induced carbonate precipitation method. These rock particles when produced artificially is called artificial rock and has the potentiality to protect coastlines from erosion.J. Environ. Sci. & Natural Resources, 9(1): 59-61 2016

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