The concept of the equivalent flexural rigidity of Functionally Gradient Materials (FGM)beams was presented for the first in this paper, and its formula was derived.

The equivalent longitudinal bending rigidity of a shield tunnel is discussed in this paper,as traditional equivalent longitudinal rigidity continuity model doesn t consider the longitudinal joints which can influence the equivalent longitudinal bending rigidity,al- so it doesn t consider mode of lining ring erection which can influence the equivalent longi- tudinal bending rigidity.

Based on the principle of bending stiffness equivalence,a method for simplification throughout the total cross-section of submerged floating tunnel (SFT) is proposed to obtain the model for computation.

In order to overcome the harmful effects caused by anti-roll torsion bar,the technical strategy which can be able to promote what is beneficial and get rid of what is harmful,was proposed by the concept of anti-roll equivalent stiffness.

Theoretical models of equivalent bending strength of ternary boride cermet cladding material when the clad is under press condition are built based on the position of the maximum extension stress and that of the maximum press stress respectively.

New method to measure the yarn bending rigidity from the yarn-hung configuration;

Research of Bending Rigidity Model of Soybean Protein Fiber Blended Yarn;

Study on optimum bending rigidity of seismic wall in frame-shear wall structure;