scholarly journals Mineralogical and Micro-structural Investigation into the Mechanical Behaviour of a Soft Calcareous Mudstone

2021 ◽  
Author(s):  
D. Simpson ◽  
M. Rouainia ◽  
G. Elia
Keyword(s):  
Rock Mechanics ◽  
Mechanical Behaviour ◽  
Structural Characteristics ◽  
Accurate Estimation ◽  
Bender Elements ◽  
Industry Standard ◽  
Standard Procedures ◽  
Macro Scale ◽  
Strength And Stiffness ◽  
Geotechnical Testing

AbstractThe construction industry in Abu Dhabi is thriving and its coastline has some of the most ambitious structures in the world. Whilst the subsurface evaporitic and calcareous soft rocks of this region are of great geological interest, they are relatively poorly understood from a geotechnical engineering perspective, forcing foundation designs to be overly conservative. Understanding the stiffness of the underlying geology at small strains is of great importance for the accurate estimation of ground movements around excavations and foundations, and yet routine post-SI laboratory testing programmes tend to focus on basic rock mechanics tests such as UCS tests. These procedures are generally unsuitable for use with calcareous rocks due to their friable and moisture sensitive nature, and rarely obtain parameters representative of actual in situ behaviour. The calcareous mudstone investigated in this paper has mechanical and structural characteristics falling between those of a soil and those typical of a rock and, as such, requires a geotechnical testing approach that combines methods from both soil and rock mechanics disciplines. The mineralogical, micro-structural and mechanical characteristics of this lithology have been examined via a suite of testing techniques, including XRPD, SEM, advanced triaxial with bender elements, along with industry standard procedures. Shearing, tensile and consolidation behaviours have been explored. Examination of the micro- and macro-scale features of this material shows it to be highly structured, with strength and stiffness being controlled by inter-granular bonding of Dolomite grains, as well as by mean effective stress state and rate of strain. The presence of fibrous Palygorskite acts to reduce the degree of bonding, causing specimens rich in this clay mineral to have a more ductile mechanical behaviour.

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.

scholarly journals Numerical Modelling of Travertine Mechanical Behaviour Based on Rock Mechanics Tests of Vertical Plugs

2016 ◽  
Vol 39 (2) ◽  
pp. 15 ◽  
Author(s):  
M. C. D. N. KIEWIET ◽  
E. V. BARROSO ◽  
F. O. L. FALCÃO ◽  
A. MORAES ◽  
L. H. KIEWIET ◽  
...  
Keyword(s):  
Numerical Modelling ◽  
Rock Mechanics ◽  
Mechanical Behaviour

scholarly journals In Situ Structural Characterization of Laser Welded NiTi Shape Memory Alloys

2013 ◽  
Vol 738-739 ◽  
pp. 338-343 ◽  
Author(s):  
Francisco Manuel Braz Fernandes ◽  
Karimbi Koosappa Mahesh ◽  
Corneliu Marius Crăciunescu ◽  
João Pedro Oliveira ◽  
Norbert Schell ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Synchrotron Radiation ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Mechanical Behaviour ◽  
State Of The Art ◽  
Structural Characteristics ◽  
Niti Shape Memory Alloys

The demand of emerging joining techniques for shape memory alloys (SMA) has become of great importance, as their functional properties, namely shape memory effect (SME) and superelasticity (SE) present unique solutions for state-of-the-art applications. Literature shows that significant efforts have been conducted on laser welding of these alloys, although very limited results concerning mechanical properties are repeatedly achieved. A better understanding of the mechanical behaviour of these welded joints may be got through a detailed analysis of the structural characteristics of the material from the base metal to the weld bead. Such studies have been carried out on a series of Ni-rich Ni-Ti SMA laser welded plates using synchrotron radiation.

Frame Strength and Stiffness Analysis Based on ANSYS

2015 ◽  
Vol 1094 ◽  
pp. 464-468
Author(s):  
Jiang Feng Shen ◽  
Yu Jing He ◽  
Yong Chang Yu
Keyword(s):  
Theoretical Basis ◽  
Structural Characteristics ◽  
Frame Structure ◽  
Weak Links ◽  
Analysis Software ◽  
Element Analysis ◽  
Stiffness Analysis ◽  
Strength And Stiffness ◽  
Ansys Workbench

A Case Study in spraying trailers, the frame of the structural characteristics were analyzed, using ANSYS workbench finite element analysis software for the frame were static stress analysis. First, create a physical model of the frame in Solidworks software. Then import ANSYS workbench on the frame payload processing constraints and suffered, were analyzed by calculating the frame strength and stiffness, get the frame stress cloud and find the weak links in the frame. To improve frame structure provides a theoretical basis.

scholarly journals On the Evaluation of the Mechanical Behaviour of Structural Glass Elements

2006 ◽  
Vol 514-516 ◽  
pp. 799-803 ◽  
Author(s):  
Sandra Costa ◽  
Micaela Miranda ◽  
Humberto Varum ◽  
Filipe Teixeira Dias
Keyword(s):  
Mechanical Behaviour ◽  
State Of The Art ◽  
Building Construction ◽  
Structural Glass ◽  
Tempered Glass ◽  
Structural Element ◽  
Bending Tests ◽  
Three Point Bending ◽  
Structural Applications ◽  
Strength And Stiffness

Glass can be considered to be a high-technology engineering material with a multifunctional potential for structural applications. However, the conventional approach to the use of glass is often based only on its properties of transparency and isolation. It is thus highly appropriate and necessary to study the mechanical behaviour of this material and to develop adequate methods and models leading to its characterisation. It is evident that the great potential of growth for structural glass applications is an important opportunity of development for the glass industry and the building/construction sectors. The work presented in this paper is a reflection of this conclusion. The authors shortly present the state-of-the-art on the application of glass as a structural element in building and construction, and refer to other potential fields of application and available glass materials. The experimental procedures and methods adopted in three-point bending tests performed on 500 × 100 [mm2] float, laminated and tempered glass specimens with thicknesses between 4 and 19 mm are thoroughly described. The authors evaluated the mechanical strength and stiffness of glass for structural applications. This work contributes to a deeper knowledge of the properties of this material.

Structural characteristics and mechanical behaviour of beard hair

2006 ◽  
Vol 41 (4) ◽  
pp. 1109-1121 ◽  
Author(s):  
S. M. Thozhur ◽  
A. D. Crocombe ◽  
P. A. Smith ◽  
K. Cowley ◽  
N. Mullier
Keyword(s):  
Mechanical Behaviour ◽  
Structural Characteristics

scholarly journals RESEARCH ON FORCE AND MODAL ANALYSIS OF THE CANTILEVER ROOF MODEL OF A STADIUM

2021 ◽  
Vol 30 (3) ◽  
Author(s):  
Qian Zhang
Keyword(s):  
Process Design ◽  
Selection Process ◽  
Structural Characteristics ◽  
Structure Design ◽  
Structure Model ◽  
Finite Element Software ◽  
Roof Structure ◽  
Static Performance ◽  
Strength And Stiffness ◽  
Structural Engineers

The large-span roof structure is favored by architects and structural engineers all over the world for its novel architectural shape and reasonable structural characteristics. It has been widely used in large public buildings such as sports buildings, memorial buildings and cultural buildings. Based on the structure design of the fourth national college students’ competition winning entries for the model, this paper introduces the stadium upper cantilever roof structure model selection, process design, interface, etc. Using the finite element software ANSYS to analyze the model structure under different load conditions of the static performance, we acquire its natural frequency. The results show that the model meets both the strength and stiffness requirement.

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