What is the dynamic modulus of concrete?
What is the dynamic modulus of concrete?
The ratio of static modulus of elasticity of concrete to the dynamic modulus of elasticity of concrete (Ec/Ed) for the normal strength concrete (mix (1)) is between (36 to 55%). While for high strength concrete (mix (2)) the ratio is between (15 to 27%).
What is the Young’s modulus of concrete?
30 to 50 GPa
The elastic modulus of hardened cement paste is around 10 to 30 GPa and that of aggregate is between 45 to 85 GPa. Concrete generally have an elastic modulus varying between 30 to 50 GPa.
What is dynamic Youngs modulus?
Young’s modulus is a measure of the stiffness of an elastic material, and it is defined as the ratio of stress to strain. In practice, the estimated Young’s modulus from sonic logs is termed dynamic Young’s modulus. …
How do you calculate the dynamic modulus of elasticity of concrete?
From measurement of ultrasonic waves velocity it is possible to calculate the elastic dynamic modulus Ed as follows Ed = v2 Q * (1+n)*(1-2n)/(1-n) Where, V = velocity in km/s Q = concrete density in kg / m3 N = poisson’s ratio ( for high strength concrete N = 0.15 , For low strength concrete N = 0.30 ) Ed = dynamic …
Is Young’s modulus the same as flexural modulus?
Ideally, the flexural modulus of a material is equivalent to its Young’s modulus. In practical terms, the higher the flexural modulus of a material, the harder it is to bend. Conversely, the lower the flexural modulus is, the easier it is for the material to bend under an applied force.
What is dynamic modulus used for?
Dynamic modulus (sometimes complex modulus) is the ratio of stress to strain under vibratory conditions (calculated from data obtained from either free or forced vibration tests, in shear, compression, or elongation). It is a property of viscoelastic materials.
What is E value concrete?
Tensile strength – σ : 2 – 5 MPa (300 – 700 psi) Modulus of elasticity – E : 14 – 41 GPa (2 – 6 x 106 psi)
What is the value of Young’s modulus?
This is a specific form of Hooke’s law of elasticity. The units of Young’s modulus in the English system are pounds per square inch (psi), and in the metric system newtons per square metre (N/m2). The value of Young’s modulus for aluminum is about 1.0 × 107 psi, or 7.0 × 1010 N/m2.
What is Youngs modulus a measure of?
What does the Young’s Modulus tell us about a material? One the most important tests in engineering is knowing when an object or material will bend or break, and the property that tells us this is the Young’s modulus. It is a measure how easily a material stretches and deforms.
Is higher Young’s modulus better?
What Does Young’s Modulus Mean? The greater the modulus, the stiffer the material; in other words, the elastic strain resulting from the application of a given stress is smaller. The modulus is an important design parameter used to compute elastic deflections. Young’s modulus is also known as elastic modulus.
What is the difference between tensile modulus and Young’s modulus?
Young’s modulus(E) evaluates the elasticity of a material, which is the relation between the deformation of a material and the power needed to deform it. Tensile strength is the value of the maximum stress that a material can handle. This is the limit between plasticity zone and rupture zone.
The Young’s modulus of concrete formulas used in the spreadsheet are detailed below. This spreadsheet can be purchased below for only £5. The definition of the modulus of elasticity or Young’s modulus of concrete is the ratio of stress to strain. Concrete behaves in a linear elastic manner up to around 40% of its ultimate strength.
What is dynamic modulus of elasticity of concrete?
Dynamic Modulus: The value of modulus of elasticity E c determined by actual loading of concrete is known as static modulus of elasticity. This method of testing is known as destructive method as the specimen is stressed or loaded till its failure.
What is dynamic modulus in ultrasonic testing?
Dynamic modulus has been assumed to be initial tangent modulus at zero stress determined in the standard test because only negligible stress is applied during ultrasonic pulse velocity (UPV) measurements and resonance frequency tests [ 7 A. M. Neville, Properties of Concrete, John Wiley & Sons, New York, NY, USA, 4th edition, 1997. ]. Philleo [ 8
What is modular ratio in reinforced concrete?
At the time of design of a reinforced concrete structure, it is assumed that the bond between concrete and steel is perfect and the stress in steel is ‘m’ times the stress in concrete, where m is the ratio of modulus of elasticity of steel and concrete. This ratio is known as modular ratio.
