Podcast
Questions and Answers
What type of test is the Charpy test for composite toughness?
What type of test is the Charpy test for composite toughness?
- Compression test
- Impact test (correct)
- Tensile test
- Shear test
What happens to the fracture energies in the Charpy test compared to quasi-static tests?
What happens to the fracture energies in the Charpy test compared to quasi-static tests?
- They are the same
- They are lower
- They are unpredictable
- They are higher (correct)
What happens to the fracture energy for most composite materials as crack length increases?
What happens to the fracture energy for most composite materials as crack length increases?
- It decreases linearly
- It increases until a limit length and then stops (correct)
- It remains constant
- It increases linearly
What happens to the fracture energy for uniaxial plies as the loading angle increases?
What happens to the fracture energy for uniaxial plies as the loading angle increases?
Under what conditions does a crack remain stable if the energy absorbed by it is lower than its critical value Gc?
Under what conditions does a crack remain stable if the energy absorbed by it is lower than its critical value Gc?
What is the impact of failure strain of the matrix on fatigue handling in thermoset composites?
What is the impact of failure strain of the matrix on fatigue handling in thermoset composites?
What effect does cycling frequency have on fatigue strength in composites?
What effect does cycling frequency have on fatigue strength in composites?
Which type of materials have the most stable thermal behavior?
Which type of materials have the most stable thermal behavior?
What is the impact of boiling glass-epoxy composites on fatigue resistance?
What is the impact of boiling glass-epoxy composites on fatigue resistance?
How do materials with higher α behave in terms of thermal expansion?
How do materials with higher α behave in terms of thermal expansion?
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