This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.
In this episode you will learn:
- Understand that thermal strain (ε = αΔT) occurs with any temperature change, but thermal stress (σ = EαΔT) only develops if the object is constrained.
- Recognize that a temperature increase in a constrained member results in compressive stress, while a temperature decrease results in tensile stress.
- Be prepared to look up the Modulus of Elasticity (E) and the coefficient of thermal expansion (α) in the NCEES FE Reference Handbook.
- Watch out for distractor information in exam problems, such as the initial length of a member when only stress is required.
- Remember the key phrase: "No constraint, no stress" to avoid the common trap of calculating stress for a freely expanding object.
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