Materials Testing

Reversed loading flexural fatigue

Dr. Donald F. Adams, owner and president of Wyoming Test Fixtures (Salt Lake City, Utah) discusses reverse loading flexural fatigue testing and fixture design.

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Adhesives

Bending of composite material compression specimens

Dr. Donald F. Adams, president of Wyoming Test Fixtures (Salt Lake City, Utah) looks at the effect bending has on compression testing of composite specimens.

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Aerospace

VIDEO: Helicopter Drop Test

NASA evaluates composites’ ability to improve helicopter crashworthiness by dropping a helicopter fuselage to simulate a severe survivable crash according to military and commercial transport requirements.

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Buckling of composite material compression specimens

Dr. Donald F. Adams (Wyoming Test Fixtures, Salt Lake City, Utah) rehearses the causes of, and solutions for, problems with buckling in composite compression specimens.

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Medical

ABCs of ultrasonic inspection

A primer on nondestructive ultrasonic inspection technology.

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The Short Beam Shear test method for composite materials

Dr. Donald F. Adams (Wyoming Test Fixtures (Salt Lake City, Utah) suggests larger support and loading cylinders for the Short Beam Shear test method.

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Aerospace

Optimization software improves small, low-cost satellite design

Ames Research Center’s (Moffett Field, Calif.) designs and builds a low-cost, small spacecraft on a quick turnaround, using a modular strategy based on commercial off-the-shelf (COTS) parts and with the aid of several design software packages and finite element solvers.

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The Double-Notch Shear test specimen for composite materials

Dr. Donald F. Adams (Wyoming Test Fixtures Inc., Salt Lake City, Utah) recommends best practices for double-notch shear test specimens.

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Software isolates, identifies porosity-related flaws in tooling from fuselage test data

Software and composites manufacturing data specialist NLign Analytics, a division of Etegent Technologies (Cincinnati, Ohio) helps identify and track product flaws caused by tooling porosity.

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Adhesives

Thickness-tapered unidirectional composite specimens

Sometimes a testing concept is known for a long time but is never developed into an established test method.

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