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Tension is the force required to pull the wire against the accumulation of all resistance, forces and loads. Tension is one of the important controlled parameters in winding process in order to determine the quality of the product. Winding process in electric discharge machine (EDM) wire manufacturing is the last process before the product is packed and sent to customers. In EDM wire manufacturing...
The correlation between disease pathology and tissue stiffness can be exploited to detect and potentially diagnose abnormal tissue states. Elastography is an imaging modality that attempts to image tissue stiffness by measuring local displacements caused by an applied force and calculating a strain map. Some elasticity imaging techniques attempt to assign a material parameter, such as Young's or shear...
In this study, the FEM (finite elemental method) model that reproduces the void geometry and array was made from the image of the sintered nanomaterial by using SEM (scanning electron microscope). The nonlinear strain can be estimated by using the structural analysis. The strain of elements exceed a certain threshold value was transmuted from the metal to the void. Then, the structural analysis applies...
Remote microsystems which have no physical connection to the outside world is having inefficient supplying of power and replacement of batteries is not always a convenient solution. But the piezoelectric energy scavengers through its direct piezoelectric effect can convert energy from random vibrations. In this paper, different traditional unimorph piezoelectric harvester geometries with tip mass...
This research clarified the anomalous electric resistance change of ultrastrained multi-walled carbon nanotube (MWCNT), as well as its mechanical properties, using the Electrostatically Actuated NAnotensile Testing device (EANAT) mounted on the in-situ SEM nanomanipulation system. The Young's modulus of MWCNT and its shear stress during interlayer sliding deformation were estimated from the load-displacement...
This paper presents a new phenomenological model for magnetic shape memory (MSM) alloy actuators. The model was implemented as a lumped element for multi-domain network models using the Modelica language. These network models are rapidly computed and are therefore well suited for MSM-based actuator design and optimization. The proposed MSM model accounts for the 2-D hysteresis of the magnetic field-induced...
In this work, a new system is presented to measure load and motion in six degrees of freedom synchronously to assess amputee gait in real time. The device is integrated in the shank of lower limb prostheses to measure the gait parameters based on a combination of AHRS (Attitude Heading Reference System) and a strain gauge pylon. This novel mobile and autonomous system enables new possibilities of...
Mesenchymal stem cells (MSCs) have the potential to differentiate to other cells and this feature makes it as an attractive source in tissue engineering. Mesenchymal stem cells are subjected to many mechanical stimuli in vivo such as an in vivo pressure loading and one of the cell respond to these stimuli is differentiation to cartilage or bone cell. One of the most significant ways for this goal...
The paper presents development of simulation method and measuring system for a lifetime characterization of concentric circuit boards. It brings a knowledge about modern approaches of structure lifetime estimation by using a FEM (finite element method) modelling. Methods known in the field of mechanical engineering and material engineering are extended by the author with the new knowledge and applied...
At present several material combinations are fabricated to cover the demands of ubiquitous applications. In the case of metamaterials, properties are greatly affected not only by composition and shape, but also by interfacial strength and directionality of the patterned substructure. In this work a bottom-up approach is chosen to characterize interface strength, where interfacial interaction is calculated...
This article uses finite element ABAQUS to set up the 3-dimensional finite element model of the dynamic tri-axial specimen, simulate the dynamical deformation behavior of the stabilized-soil under cyclic load. The main focuses on the freezing temperature of the strengthen soil of the plastic deformation. Meanwhile, the influence to the strengthen soil dynamical characteristic such as cyclic load's...
Flip-chip assembly using anisotropic conductive adhesives (ACAs) has been successfully applied to the achievement of fine pitch electrical interconnections for certain niche applications, particularly flat panel displays. ACAs are an adhesive polymer containing a low volume fraction of conductive particles, which are typically comprised of a polymer core coated with nickel and a thin layer of gold...
Bone marrow was assumed to be negligible on the aspect of bone mechanical behavior, where bone mass and bone mineral density were most studied. As a result, if the bone marrow, especially the marrow fat, plays a role in the bone mechanical properties is unknown yet. Marrow fat content was found increased in osteoporotic bone. However, the relationship between such change of bone marrow and bone strength...
The finite element model of bump bonding is built and loads with conditions of bonding time, bonding pressure and bonding power at the same time, and the stress and strain analysis of the pad will take place using this bump bonding finite element model. The result show that: the stress and strain distribution of the pad is not even and increasing with the time, the largest stress and strain all locate...
Thin ITO-based PET conductive membranes are the major sensing structure in resistive touch panels for network phones or other applications. However, device failures or malfunctions such as early touch and disagreement between force-applied and touched locations have been reported. By examining the surface profiles, it was found that these membranes have considerable initial out of plane deformation...
Solder joint integrity is recognized as a key issue in the reliability of electronic devices. In the past decades, SnAgCu eutectic based solders are replacing SnPb eutectic solders in the electronics industry. Although the Pb-free solder is usually regarded as having a higher melting temperature compared with traditional Pb-Sn eutectic solder, solder joints were generally operated at a high homologous...
The purpose of this study is to model the nonlinear hysteretic behavior of piezoceramic materials under mechanical loading to determine associated domain wall evolution laws. The model is constructed by bridging the characteristics of microscopic domain distribution into the macroscopic behavior. Evolutions of the remanent strain and remanent polarization are described by a domain distribution evolution...
Thin ITO-based PET conductive membranes are the major sensing structure in resistive touch panels for network phones or other applications. However, device failures or malfunctions such as early touch and disagreement between force-applied and touched locations have been reported. By examining the surface profiles, it was found that these membranes have considerable initial out of plane deformation...
The finite element model of bump bonding is built and loads with conditions of bonding time, bonding pressure and bonding power at the same time, and the stress and strain analysis of the pad will take place using this bump bonding finite element model. The result show that: the stress and strain distribution of the pad is not even and increasing with the time, the largest stress and strain all locate...
Solder joint integrity is recognized as a key issue in the reliability of electronic devices. In the past decades, SnAgCu eutectic based solders are replacing SnPb eutectic solders in the electronics industry. Although the Pb-free solder is usually regarded as having a higher melting temperature compared with traditional Pb-Sn eutectic solder, solder joints were generally operated at a high homologous...
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