图3.9显示了不连续碳纤维增强水泥的压应力-应变曲线。 曲线(a)是在

Figure 3.9 shows the compressive stress-strain curve of discontinuous carbon fiber reinforced cement. Curve (a) is observed before any load, that is, in the original state. Curve (b) is the state after some loading and unloading, that is, the slightly damaged state. Both stress and strain are negative values ​​because, by convention, compressive stress is negative (and tension is positive), while strain involving contraction is negative (and strain involving elongation is positive). The comparison of curves (a) and (b) shows that the damage causes the slope (ie modulus) of the curve to decrease and the maximum stress value (ie strength) to decrease. The decrease in modulus is called residual modulus, and the decrease in strength is called residual strength.

Figure 3.9 shows the pressure stress-strain curve of discontinuous carbon fiber-reinforced cement. The curve (a) is observed before any load, i.e. in its original state. A curve (b) is a state that has been loaded and unloaded, i.e. a state of minor damage. Stress and strain are both negative because, by convention, pressure stress is negative (and tension is positive) and strain involving contraction is negative (and strain involving elongation is positive). A comparison of the curve (a) and (b) shows that the damage causes the slope (i.e. modulus) of the curve to decrease and the maximum stress value (i.e. strength) to decrease. The reduction of the modulus is called the residual modulus, and the decrease in strength is called the residual strength.

Figure 3.9 shows the compressive stress-strain curve of the discontinuous carbon fiber reinforced cement. Curve (a) is observed before any load, i.e. in its original state. Curve (b) is the state after some loading and unloading, i.e. the state of slight damage. Both stress and strain are negative because, by convention, compressive stress is negative (and tension is positive), while strain involving shrinkage is negative (and strain involving elongation is positive). The comparison of curves (a) and (b) shows that the damage causes the slope (i.e. modulus) of the curve to decrease and the maximum stress (i.e. strength) to decrease. The decrease of modulus is called residual modulus, and the decrease of strength is called residual strength.<br>