A 2-D scanning SQUID-Based NDE system for testing of room temperature stationary samples in unshielded environments has been designed and implemented (in SERL Laboratory, http://serl.sharif.edu/). Using our NDE system with white noise level of about 50 μΦ0/Hz-1/2 at 500Hz (in unshielded environment) and with a nonmagnetic 2-D robot, we performed NDE scans of hidden cracks in aluminum sheets. We...

In the present paper, stress intensity factor (SIF) analyses and fatigue-crack-growth simulations of corner cracks emanating from loaded pinholes of attachment lugs in structural assemblies are carried out for different load cases. A three-dimensional (3D) symmetric Galerkin boundary-element method (SGBEM) and FEM alternating method is developed to analyze the nonplanar growth of these surface ...

Unlike many features of metazoan development, sex determination is not widely conserved among phyla. However, the recent demonstration that one gene family controls sexual development in Drosophila, C. elegans, and vertebrates suggests that sex determination mechanisms may have evolved from a common pathway that has diverged radically since the Cambrian. Sex determination gene sequences often e...

Abstract A Problem Solving Environment for the finite element method (FEM-PSE) is an application system to support users pursuing a career in the finite element analysis (FEA). There are two types of users associated with the FEA. One is analysis-user who uses application software of the FEM and the other is development-user who develops application software of the FEM. We used an abstraction t...

In today's industry applications, robot and articulated manipulator systems are widely used because of their advantages in continuous operation, minimum cycle time lowest error rate parameters. this study, the Rigid Dynamic Analysis manipulator, whose 2-D model was drawn, extracted with Polylactic Acid (PLA) raw material a 3D printer assembled accordance tolerances, carried out using Finite Ele...

OBJECTIVE We employ a nasal tip finite element model (FEM) to evaluate contributions of two of the three major tip support mechanisms: attachments between the upper and lower lateral cartilages and attachment of the medial crura to the caudal septum. STUDY DESIGN The nasal tip FEM computed stress distribution and strain energy density (SED) during nasal tip compression. We examined the impact...

Introduction: Breast cancer tumors are 3-13 times stiffer than normal tissue [1]. The use of strain-encoded (SENC) MRI was proposed in [2] to detect masses by measuring strain, which is inversely proportional to stiffness. The use of strain imaging of breast lesions would provide a new measure for clinical diagnosis between benign and malignant tissue. Previously in [2], we have shown that SENC...

For solving electroencephalographic forward problem, coupled method of finite element method FEM and fast moving least square reproducing kernel method FMLSRKM which is a kind of meshfree method is proposed. Current source modeling for FEM is complicated, so source region is analyzed usingmeshfreemethod. First order of shape function is used for FEM and second order for FMLSRKM because FMLSRKM ...

PURPOSE Intrastromal corneal-ring segments (ICRSs) are applied to improve highly distorted vision in keratoconic, myopic, and astigmatic patients. Selections of ICRS geometry and position are primarily based on empirical nomograms. We developed a finite-element model (FEM) predicting the corneal response to different ICRS geometries in normal and keratoconic corneas. METHODS A two-dimensional...

This paper shows that the generalized finite element method with global–local enrichment functions (GFEM) can be implemented non-intrusively in existing closed-source FEM software as an add-on module. The GFEM is based on the solution of interdependent global (structural) and local (crack) scale problems. In the approach presented here, an initial global scale problem is solved by a commercial ...