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Gripping composite test specimens: Options and guidance
Orthotropic behavior of composites test specimens makes load introduction uniquely challenging.
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What’s the most important type of mechanical test for composites?
When the opportunity arises, I like to ask those familiar with composites testing this question: What type of mechanical test do they consider to be the most important for composite materials?
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Can flexure testing provide estimates of composite strength properties?
Flexure tests are simple to perform, yet the state of stress and failure modes are among the most complex.
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Choosing composite material testing methods
An initial step in selecting suitable test methods involves consulting the available test literature.
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Best practices for V-notched shear testing of composites
In my October 2015 column, I wrote an overview of the widely used V-notched shear test methods for composite materials. In this column, we focus on some additional best practices when performing V-notched shear testing of fiber-reinforced composites.
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Damage tolerance testing of composites
Not standardized until 2005, ASTM D 7137 is still commonly referred to as the Boeing CAI test.
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Damage-resistance testing of composites
Guest columnist Dr. Dan Adam's focuses on testing to assess the damage resistance of a composite laminate.
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Bearing testing of composites
CW columnist Dr. Dan Adams (Wyoming Test Fixtures, Salt Lake City, UT, US) reviews the available options for testing the bearing strength of mechanically fastened composite joints.
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Notched testing of composites
Open-hole test methods were developed in the early 1980s to compare toughness increases in new composite materials.
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Fracture mechanics testing of composites
Dr. Daniel O. Adams, professor of mechanical engineering and director of the Composite Mechanics Laboratory at the University of Utah, and vice president of Wyoming Test Fixtures Inc. (Salt Lake City, UT, US), addresses ways to acquire mechanical test data and then calculate the values for the composite material property of fracture toughness.
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V-notched shear testing of composites
Dr. Daniel O. Adams, professor of mechanical engineering and director, for 18 years, of the Composite Mechanics Laboratory at the University of Utah, and VP of Wyoming Test Fixtures Inc. (Salt Lake City, UT, US), reviews the most popular V-notched shear test methods for composite materials.
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Optimum unidirectional compression testing of composites
Dr. Daniel O. Adams, a professor of mechanical engineering, the director of the Composite Mechanics Laboratory at the University of Utah, and VP of Wyoming Test Fixtures Inc. (Salt Lake City, UT, US) discusses the complex relationship between composite tensile and compressive properties, why that makes it necessary to perform both tension and compression testing, and how best to perform the latter.
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