Thus many non-destructive evaluation (NDE) techniques were later developed to evaluate the damage of CFRP composites under fatigue, such as infrared thermographic techniques, acoustic emission, X-ray radiography and X-ray micro-computed tomography (μCT). This method was limited because the specimens had to rupture to get the residual strength, which is often unacceptable because of the high cost. The reasons for the rise of residual strength are that much off-axis fibers have been reassigned to the loading direction under fatigue condition. However, some researchers also found the opposite results that the residual strength increases after a certain number of fatigue cycles. Usually residual strength decreases as the number of fatigue cycles increases because of damage such matric cracks and delamination which results from fatigue load, ,. In many previous studies, the residual strength was often used to evaluate the damage of CFRP composites under fatigue condition, ,,. Although good fatigue resistance is shown, the fatigue performances of CFRP composites are still investigated by many researchers because of their long service life (usually more than 30 years) for both military and civil aircrafts, ,, ,, ,, ,, ,, ,,. The CFRPs are becoming more and more popular to be an excellent replacement for traditional metallic materials. They exhibit higher strength-to-weight, stiffness-to-weight ratios and good fatigue resistance, thus making the aircraft lighter and improving performance,. A new fatigue model ( p– γ– S– N curve) was also established to predict the reliability fatigue life.Ĭarbon fiber reinforced polymer (CFRP) composites are widely used for primary load-bearing structures in aeronautics engineering. The results show that reliability fatigue life reduces more when the reliability increases than when confidence level does to the same degree. Single side allowance factor was proposed to calculate the reliability fatigue life with both reliability and confidence level. The distribution of fatigue life was determined. Damage evolution was studied by fatigue specimens’ edge view, which showed the damage in 90° plies initiate firstly and propagate most seriously during fatigue. The stiffness degradation shows a quasi-linear slow decline during approximately 0–80% fatigue life and has a sharp decline since 80% fatigue life. Failure modes of the fatigue specimens are mainly characterized by severe delamination throughout the whole gauge length while the static tension specimens exhibit brittle fractures within a small region. An alley access two car garage and utility room are found at the rear of the property.Tension–tension fatigue performances of T700/MTM46 composite laminates were investigated in this paper and the fatigue limit was determined. From here and elsewhere on the property are dramatic views of the nearby San Gabriel Mountains to the north and the expanse of city below to the south. A long lost trellis detail above the rear deck is now back in place, giving shade to outdoor living and dining areas. Beautiful old growth redwood siding has been given new life. Vintage fixtures and hardware have been restored and reinstated. A seamless merging of period and new that has become synonymous with HabHouse projects shows up in spectacular fashion with custom birch cabinetry and Japanese sourced tile in the new kitchen and both baths. Views distant and near are framed by a grid of window walls. The result is a living space that feels nearly twice the size of it's measure. The original plan remains intact- deep eaves shelter large expanses of glass walls that open in all directions to private patios and gardens. In the process of restoring the home to its former glory, HabHouse had the rare privilege of interviewing the now 91 year old architect about his design and work. On Edgeview Drive, the calm cul-de-sac location and gently descending street to street lot gave him the opportunity to develop an ideal model of the mid-century modern home. He quickly became a practitioner of wooden post-and-beam architecture, evolving its design along with his mentors to influence architecture locally and beyond. Corey's version of California modernism displays the influence not only of his studies under Cal Straub at USC, but also his deep appreciation for the work of Frank Lloyd Wright. The Robert & Rachel Corey Residence, Jack Corey AIA (1954.) Built for his parents while still a student at USC and later used as his personal residence, this early design shows an astonishing level of skill and sophistication from the young architect.
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