Very high cycle fatigue (VHCF) tests were carried out under variable amplitude loading for TC21 titanium alloy. The first level of was set as 950 MPa close to yield strength, and the second low determined between 435 500 where cracks initiated at specimen subsurface constant amplitude. results indicate that high/low stress block significantly reduced cumulative life amplitude, crack initiation ...

This paper discusses the topic of probabilistic analysis composite laminates rectangular plates containing a central circular hole under static tensile load. First, According to continuum damage mechanics (CDM) approach, structural models, definition and treatment random variables will be explored. Then, matrix cracking fiber/matrix debonding is modeled material constitutive relationships are i...