The moment which makes all the fibres at the section to yield is known as

• Plastic Moment Capacity:
• The plastic moment capacity is the maximum moment that a cross-section can resist once it has fully yielded.
• At this moment, the entire cross-section has reached the yield stress, and the section is in a fully plastic state.
• This is an important concept in plastic analysis and design, where the strength of a structure is determined based on its ability to undergo large deformations before collapsing.

Additional Information

• 1. Moment of Resistance:
• The moment of resistance is the moment at which the internal stresses within a structural member balance the external forces. It can vary depending on whether the section is elastic, partially plastic, or fully plastic.
• 2. Yield Moment:
• The yield moment is the moment at which the first fiber of the cross-section reaches the yield stress. It is the moment that marks the transition from elastic behavior to plastic behavior, but not all fibers in the section are yielding yet.
• 3. Flexural Rigidity:
• Flexural rigidity is the product of the modulus of elasticity E the moment of inertia I of a section. It represents the resistance of a section to bending under an applied moment but is not directly related to the moment at which yielding occurs.