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April 2020

CANCELLED: MEAM Seminar: “U.S. Army Additive Manufacturing Materials and Technologies”

April 7 at 10:30 AM - 12:00 PM
Wu and Chen Auditorium (Room 101), Levine Hall, 3330 Walnut Street
Philadelphia, PA 19104 United States
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With the constantly changing threat environment, the Army needs to be able to quickly adapt their tactics and equipment. But burdensome and lengthy acquisition cycles make this challenging. Additive manufacturing can potentially be utilized to overcome many of the challenges and enables on-demand manufacturing of repair parts, as well as rapid prototyping. Through topology optimization, parts can be designed lighter and/or stronger and more cost-effective. In addition to new technologies being explored such as hybrid manufacturing in which entire metal…

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CANCELLED: MEAM Seminar: “Modeling the Behavior of Shape Memory Alloy Structures”

April 14 at 10:30 AM - 12:00 PM
Wu and Chen Auditorium (Room 101), Levine Hall, 3330 Walnut Street
Philadelphia, PA 19104 United States
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I will present recent work on the modeling of the structural response of shape memory alloy tubes, bars, and beams. We have developed a new constitutive model that captures pseudoelastic transformation induced recoverable deformation in SMAs including the strong asymmetries in the tensile and compressive responses. Instead of introducing multiple conditions for forward phase transformation, reverse phase transformation, and martensite reorientation, the model is based on a J2-type nonlinear kinematic hardening framework with a single transformation surface and the back…

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