An experimental investigation was carried out to generate the mechanical behavior of normal concrete cores with a strength range of 10 50 MPa, including the compressive strength, elastic modulus, strain at peak stress and stress strain relationships.
From several formulations for concrete in this study, it was observed that a conservative estimation of the elastic modulus and strain at peak stress can be obtained from the value of compressive strength.
Curing time shows definite effect on the mechanical properties such as uniaxial compressive strength (UCS) and tangent Young's modulus at 50%% of peak stress (E50) in 2 weeks.
Notably, mechanical performance of scaffold-fiber composites (elastic modulus, peak stress, strain at peak stress, and toughness) can be selectively manipulated by varying fiber-reinforcement geometry without affecting the native bioactivity of the collagen scaffold.
Maximum modulus count rate error at peak NECR as well as maximum and minimum error for all activity concentrations are reported.
Then, the dynamic compressive properties of RCC material under intermediate strain rate are investigated in terms of failure pattern, stress-strain curve, dynamic increase factors (DIF) of compressive strength, Young's modulus and critical strain at peak stress.
The peak stress, strain at peak stress, modulus of elasticity, energy dissipation ability and the constitutive model under uniaxial compression were examined.
The comparison showed that the proposed modeling approach can properly simulate the entire stress strain relationship of AMFRC as well as the primary mechanical properties in compression including the modulus of elasticity and strain at peak stress.
Based on the experimental results, prediction equations were proposed for the modulus of elasticity and strain at peak stress as functions of fiber volume fraction and concrete compressive strength.
Strain rate sensitivity of the materials is measured in terms of the stress strain curve, elastic modulus, compressive strength and critical strain at peak stress.
