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Full-Text Articles in Mechanical Engineering
On The Generation And Detection Of Ultrasonic Plate Waves In Microporous Polymeric Material, Lin Lin
On The Generation And Detection Of Ultrasonic Plate Waves In Microporous Polymeric Material, Lin Lin
Electronic Theses and Dissertations
Membranes are among the most important engineering components in use in many process industries. Examples of uses for membranes include water purification, industrial effluent treatment, recovery of volatile organic compounds, protein recovery, bio-separations and many others. Polymeric membranes are the most commonly used membranes. Membranes act as a barrier through which fluids and solutes are selectively transported. Quality assurance is a critical aspect of membrane module fabrication. In other materials, ultrasound has been widely used for materials characterization as well as flaw detection. Recently ultrasonic techniques have been used to detect the presence of defects in membranes. This thesis describes …
Optimal Recovery Of Elastic Properties For Anisotropic Materials Through Ultrasonic Measurements, Miao Sun
Optimal Recovery Of Elastic Properties For Anisotropic Materials Through Ultrasonic Measurements, Miao Sun
Electronic Theses and Dissertations
Full knowledge of material elastic properties is required to facilitate design in many applications. The existence of misorientation between the geometric axes of the part and the material symmetry axes has in particularly created challenged in design of composite structure. In this thesis the potential for optimal identification of material symmetries for a general anisotropic material through a water immersion technique is explored. The concept is extensible to any class of symmetry groups and does not assume a-priori knowledge of the material. Initial experimental results for determining the elastic constants as well as locating the symmetry planes are presented. Many …