Tensile stress-strain is a measure of the amount of force a material can withstand before it breaks or deforms.
The ultimate strain of plain concrete is the maximum amount of deformation or elongation the material can experience before it fails under tension.
The ultimate strain of plain concrete is typically determined through laboratory testing, where a sample of the material is subjected to increasing amounts of tension until it breaks. The amount of deformation at the point of failure is then measured and recorded as the ultimate strain.
The ultimate strain of plain concrete can be affected by several factors, including the composition and strength of the concrete, the amount of reinforcement or prestressing, the curing method, and the environmental conditions in which the concrete is used.
Understanding tensile stress-strain, including the ultimate strain of plain concrete, is important in the design and construction of concrete structures to ensure their durability and safety. By knowing the limits of the material, engineers can accurately design structures that can withstand the expected loads and stresses.