Effect of beam length on determination of dynamic elastic modulus of materials by means of cantilevel beam method;

Laboratory experimental study on dynamic elastic modulus of sandy pebble soil subjected to dynamic loading;

Degradation of dynamic elastic modulus of soft clay under cyclic loading;

Using compression wave ultrasonic transducers to measure velocity of surface waves and dynamic modulus of elasticity for concrete;

It was researched that increasing tendency of the dynamic modulus of elasticity and the compressive stength of concrete in standard environment after having been cured at -5-10-15and naturally altering minus temperature(+1-6-5-15).

It was discussed that the development of dynamic modulus of elasticity and compressive strength of concrete in standard environment after having been cured at -5℃、-10℃、-15℃ for 7days and under condition of changing to minus temperature naturally(+1℃～-6℃、-5℃～-15℃).

8 was carried out, and the dynamic modulus variation of the specimen to the erosion time was determined by ultrasonic checking method.

The dynamic constitutive relation and the dynamic modulus are investigated according to the data obtained by dynamic triaxial tests under different conditions such as confining pressure,replacement ratio,initial dry density and initial water c.

The dynamic ratio constitutive relationship, the dynamic modulus, the dynamic damping and the dynamic distortion are investigated according to the data obtained by dynamic triaxial tests under different condition such as confining pressure, cement(lime) ratio and age.

The theoretical basis of pulse hammer excitation method used to detect the damage and measure the dynamic elastic modulus of solid wood flooring is briefly explained.

This testing method is used to check the dynamic elastic modulus of cured LPA/UP to establish the dependency relation between modulus and bending strength and carry out the regression analysis and this method can therefore be .

During austenization, higher strength is associated with higher dynamic elastic modulus.

Secondly, the space analysis model for dynamic modulus of elasticity of concrete was set up, and a series of theories analysis and calculations to the model were performed.

A theoretical model is proposed for the change of first four order modal and no modal dynamic moduli of elasticity of a concrete cantilever with block and for gypsum cantilevers to three different scales with and without block.