Catalogue Search | MBRL
Are you sure you want to remove the book from the shelf?
{{itemTitle}}
48,949
result(s) for
"Statics"
Sort by:
Engineering statics
\"Engineering statics presents the cutting-edge topics in engineering statics, focusing on practical applications knowledge, with numerous real-world examples, practice problems, and case studies throughout. It covers theory concisely and uses plain language and coverage that can be completed in a one-semester course. It also covers the related concepts required to take the Fundamentals of Engineering (FE) exam. Features: Written in plain language, with numerous realistic step-by-step examples, covers topics required to understand and prepare for the Fundamentals of Engineering (FE) exam, includes practical case studies, concise theory and numerous solved practice problems. Engineering statics is suitable for undergraduate students in civil and mechanical engineering courses, as well as those in Engineering technology and applied courses. Research ambiguities are avoided considering the interests of lower-division students. The authors believe that this text will be very helpful for students to succeed in their degree programs and professional careers\"-- Provided by publisher.
Book
Analysis method and test verification of bearing capacity of floor seat track of civil aircraft
According to the floor seat track structure of civil aircraft, the dangerous section of the seat track under specific loads is studied, a set of static test methods is designed, and the bearing capacity of three loaded directions is obtained. Good agreement was obtained between the experimental results and the analytical predictions. By comparing the data, it is verified that the bearing capacity can be accurately predicted by such an analysis method.
Journal Article
Low-frequency multi-direction vibration isolation via a new arrangement of the X-shaped linkage mechanism
Most existing quasi-zero stiffness (QZS) isolators with excellent vibration isolation performance in the low-frequency range are designed to attenuate vibration transmission only in one direction, but vibration suppression in multi-direction is more useful and expected in engineering practice. Hence, a novel 3-degree-of-freedom (3-DOF) passive vibration isolation unit with enhanced QZS effect in a large stroke is designed based on the X-shaped mechanism. The 3-DOF vibration isolation unit exhibits beneficial nonlinear stiffness and damping properties, and it can provide excellent ultra-low-frequency vibration isolation performance in three directions simultaneously. Combining two such isolation units can of course lead to more DOF vibration isolation. The effects of several design parameters such as spring stiffness, lengths of the rods, static equilibrium positions, spring connection parameters, damping coefficients and excitation amplitudes on vibration isolation performance are analyzed in detail. Some comparisons of the static characteristics and vibration isolation performance with a spring–mass–damper (SMD) isolator and an existing typical QZS isolator are carried out. The results reveal that (a) the proposed 3-DOF vibration isolation unit can have much enhanced QZS range with larger loading capacity in the vertical and horizontal directions and HSLD stiffness in the rotational direction; (b) when the excitation amplitudes are large, the novel vibration isolation unit exhibits beneficial nonlinear properties in all three directions without jumping and bifurcation phenomena; (c) compared with the typical QZS isolator, the X-shaped mechanism enables the proposed isolation unit to possess excellent vibration isolation performance in three directions simultaneously with guaranteed stable equilibrium; (d) the new 3-DOF isolator includes only 4 bars in the entire mechanism due to the special and totally new arrangement of the X-shaped mechanism without any guiding sliders, leading to more compact designs of multi-DOF vibration isolation systems of high performance, definitely demanded by engineering practices.
Journal Article
Design and Stability analysis of CNTFET based SRAM cell
Carbon Nanotube Field Effect Transistor (CNTFET) has proved to be very beneficial for VLSI circuit designs in the nano scale range due to its amazing properties than MOSFETs. As we reduce the gate length of the device to below 45nm, we see a lot of changes in its parameters such as stability of the cell reduces, power consumption and delay increases which are different from the traditional MOSFETs. This becomes a serious issue when we try to take traditional MOSFETs scale down from this technology node. The main aim of this paper is to design CNTFET 6T SRAM memory cell which consumes less power and is highly stable at 32nm technology node. The Stanford model files have proved to be very good for the CNTFET devices, which simulates on 32 nm technology nodes in HSPICE tool. The results shown in this paper clearly indicate that the stability enhances by approx. 27.55% of the CNTFET SRAM cell with 37.44% improvement in the power consumption. Explicit analysis of the results shows that CNTFET based 6T SRAM cell has improved power consumption, less delay and high stability with improved read & write noise margin than conventional 6T SRAM cell.
Journal Article
Technical overview of the equivalent static loads method for non-linear static response structural optimization
Linear static response structural optimization has been developed fairly well by using the finite element method for linear static analysis. However, development is extremely slow for structural optimization where a non linear static analysis technique is required. Optimization methods using equivalent static loads (ESLs) have been proposed to solve various structural optimization disciplines. The disciplines include linear dynamic response optimization, structural optimization for multi-body dynamic systems, structural optimization for flexible multi-body dynamic systems, nonlinear static response optimization and nonlinear dynamic response optimization. The ESL is defined as the static load that generates the same displacement field by an analysis which is not linear static. An analysis that is not linear static is carried out to evaluate the displacement field. ESLs are evaluated from the displacement field, linear static response optimization is performed by using the ESLs, and the design is updated. This process proceeds in a cyclic manner. A variety of problems have been solved by the ESLs methods. In this paper, the methods are completely overviewed. Various case studies are demonstrated and future research of the methods is discussed.
Journal Article
Qualification test campaign of RFA one fairing engineering model
The fairing is an important element of the rocket as it protects the payload from the external environment during the most aggressive phases of the flight. A test campaign was developed with the aim of qualifying the fairing structure of the RFA One. This test is intended to simulate the quasi-static loads of the most critical phase during flight. A FEA model was developed to identify the most critical phase of flight and to identify the quasi-static reactions that replicate the flight loads. Based on these reactions, the loads and test levels were defined. The test results were compared with the FEA data to correlate and improve the model. The static test was successfully performed at acceptance and qualification Level 2. The load and strain results indicate that the DLL was achieved and exceeded by a factor of 1.11, while the fairing maintained its functionality and key performance. This paper presents the most relevant results of the test, discusses the results compared with the FEA model and summarizes some lessons drawn from the test campaign.
Journal Article
Mechanical fatigue of human red blood cells
Fatigue arising from cyclic straining is a key factor in the degradation of properties of engineered materials and structures. Fatigue can also induce damage and fracture in natural biomaterials, such as bone, and in synthetic biomaterials used in implant devices. However, the mechanisms by which mechanical fatigue leads to deterioration of physical properties and contributes to the onset and progression of pathological states in biological cells have hitherto not been systematically explored. Here we present a general method that employs amplitude-modulated electrodeformation and microfluidics for characterizing mechanical fatigue in single biological cells. This method is capable of subjecting cells to static loads for prolonged periods of time or to large numbers of controlled mechanical fatigue cycles. We apply the method to measure the systematic changes in morphological and biomechanical characteristics of healthy human red blood cells (RBCs) and their membrane mechanical properties. Under constant amplitude cyclic tensile deformation, RBCs progressively lose their ability to stretch with increasing fatigue cycles. Our results further indicate that loss of deformability of RBCs during cyclic deformation is much faster than that under static deformation at the same maximum load over the same accumulated loading time. Such fatigue-induced deformability loss is more pronounced at higher amplitudes of cyclic deformation. These results uniquely establish the important role of mechanical fatigue in influencing physical properties of biological cells. They further provide insights into the accumulated membrane damage during blood circulation, paving the way for further investigations of the eventual failure of RBCs causing hemolysis in various hemolytic pathologies.
Journal Article