21.4.2 - Fracture Energy (GF)
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Practice Questions
Test your understanding with targeted questions
What does fracture energy represent in fiber-reinforced concrete?
💡 Hint: Think about how the concrete reacts when it cracks.
Why is high fracture energy beneficial in concrete?
💡 Hint: What happens to energy when load is applied?
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the definition of fracture energy in fiber-reinforced concrete?
💡 Hint: Consider what happens when a crack propagates.
Is it true that higher fracture energy means lower toughness in concrete?
💡 Hint: Think about how materials behave under stress.
2 more questions available
Challenge Problems
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Given the following parameters for a fiber-reinforced concrete sample: fiber volume: 2%, aspect ratio: 50, and matrix composition: high-strength cement. Calculate the expected fracture energy increase compared to plain concrete, assuming plain concrete has a GF of 100 J/m².
💡 Hint: Consider how each factor contributes to toughness.
Discuss how varying the fiber orientation in a concrete mix might affect its fracture energy and overall performance in structural applications.
💡 Hint: Think about how fibers might interact when they are oriented differently.
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