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A STUDY OF THE POSTBUCKLING PATH OF CYLINDRICALLY CURVED PANELS OF LAMINATED COMPOSITE MATERIALS DURING LOADING AND UNLOADING 被引量:1
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作者 董万林 黄小清 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 1990年第7期651-657,共7页
In this paper, Dynamic Relaxation Method is applied to study the postbuckling path of cylindrically curved panels of laminated composite materials during loading and unloading. The phenomenon that loading paths do not... In this paper, Dynamic Relaxation Method is applied to study the postbuckling path of cylindrically curved panels of laminated composite materials during loading and unloading. The phenomenon that loading paths do not coincide with unloading paths has been found. Numerical results are given for cylindrically curved cross-ply panels subjected to uniform uniaxial compression under two types of boundary conditions. The influence of the number of layers, the panels curvature and the initial imperfection on the postbuckling paths is discussed. 展开更多
关键词 A STUDY OF THE POSTBUCKLING PATH OF CYLINDRICALLY CURVED PANELS OF laminated composite materialS DURING LOADING AND UNLOADING
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EXPERIMENTAL STUDY OF EFFECTS ON DELAMINATION NEAR CRACK OF ARALL BY RESIDUAL STRESS UNDER FATIGUE & STATIC LOADS
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作者 Zhong Weihong Chen Changqi Kou Changhe (Beijing University of Aeronautics and Astronautics, Beijing, China, 100083)Zheng Ruiqi (Beijig Institute of Aeronautical Materials, Beijing, China, 100095) 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 1996年第3期211-216,共6页
The delamination near the centre crack of ARALL under fatigue and static loads is investigated, and the effects on delamination by different residual stresses are analyzed. The results show that the situations under t... The delamination near the centre crack of ARALL under fatigue and static loads is investigated, and the effects on delamination by different residual stresses are analyzed. The results show that the situations under the two kinds of loads are different.Under the fatigue load, the typical delamination with crack growth presents symmetrical hi-ellipse-shape, whereas under the condition of static tensile, the edge-effect becomes more evident. Applying a proper pre-stress to the laminate can increase the ability of anti-delamination damage. 展开更多
关键词 composite materials. laminates FATIGUE DELAMINATING residual stress
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ANALYSIS OF COMPLEX STRESS INTENSITIES FOR CRACKED LAMINATES
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作者 胡互让 吴承平 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 1996年第2期119-132,共14页
Classical plate theory has been used to find out interfacial stress intensity factors in composite laminates. By using a well-known relation between the crack-tip energy release rate and the complex stress intensity f... Classical plate theory has been used to find out interfacial stress intensity factors in composite laminates. By using a well-known relation between the crack-tip energy release rate and the complex stress intensity factor. a closed-form solution for complex. Stress intensity in terms of external loading and a mode mix parameter for fairly. general composite laminates is given. Then a procedure for determining this mode mix. parameter is presented. followed by numerical results for some laminates. Small scale contact condition is expressed in terms of external loading In particular, a symmetric property of interfacial toughness curye is proven. Finally. the accuracy of failure load predicled by elininating oscllation index is discussed. and an example is presented to show the validity and limitation of β=0 approximation. 展开更多
关键词 composite materials. laminates complex stress intensity factor.energy release rate. inlerface Crack
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