【摘 要】
：
A generalized analytical model is developed to predict progressive failure behavior of several types of textile composites,including plain weave composites,twill weave composites,two-dimensional tri-axially braided composites and warp-reinforced 2.5-dimen
【机 构】
：
Department of Aeronautical Structure Engineering,Northwestern Polytechnical University,Xi’an 710072,
论文部分内容阅读
A generalized analytical model is developed to predict progressive failure behavior of several types of textile composites,including plain weave composites,twill weave composites,two-dimensional tri-axially braided composites and warp-reinforced 2.5-dimensional braided composites.In this model,the unit cell(UC)of composite is firstly identified and reconstructed into a refined lamina structure with multiple equivalent lamina elements(ELEs)based on apt geometrical approximation and assumptions.Secondly,two-way coupled stress-strain responses within the UC(macro-scale)and ELE(meso-scale)are established through a universal series-parallel model(SPM).Finally,a progressive damage model,which consists of damage initiation criteria and a stiffness evolution strategy,is employed to predict damage behavior of the ELE.The analytical results including mechanical properties and progressive failure process are validated against the existing numerical and experimental ones in literature.The validated analytical model is then used to study the effects of global fiber volume fraction,braided angle,shear failure coefficient and selected failure criteria on stiffness,strength and failure process.The present results demonstrate the efficiency and generic capability of the present analytical model for predicting the mechanical responses of a range of textile composites.
其他文献
The discovery of cause-effect relationships helps to understand the natural or physical mechanism [1].Causation inference is a key issue in many disciplines and has a long study history,especially in statistics,social,and biomedical sciences [2].In Earth
The cardiovascular system composed by the heart and the blood vessels is responsible for continuously transporting nutrients and oxygen to major organs [1].The thrombosis in the arteries and veins could impede the blood flow to the heart and brain and cau
Nature-inspired artificial Z-scheme photocatalyst offers great promise in solar overall water splitting,but its rational design,construction and interfacial charge transfer mechanism remain ambiguous.Here,we design an approach of engineering interfacial b
The Mesoproterozoic Bayan Obo Group located along the northern margin of the North China Craton (NMNCC) hosts a world\'s largest known rare-earth element (REE) deposit (Bayan Obo Fe-REE-Nb deposit) [1,2] and a number of large gold deposits(eg.,Haoyaoerh
The temperature evolution inside the lithium-ion battery would significantly influence its performance and safety.Currently,an in-situ technology that allows for monitoring and transmitting the internal temperature signal of the cylindrical battery has be
Excessive vibrations of railway vehicles induced by dynamic impact loadings have a significant impact on train operating safety and stability;however,due to the complexity and diversity of railway lines and service environment,they are extremely difficult
Implants,including artificial joints,bone fixation devices,and other orthopedic implants,oral implants,and vascular inter-ventional devices,are used to repair or replace human tissues or organs and restore their functions.Since biodegradable implants have
Self-assembled films (SAFs) have been proposed to be a promising candidate for molecularly thin lubricants.However,the frictional performance of SAFs is sensitively dependent on their molecular structures that are susceptible to external environments.Taki
The particle raft is a two-dimensional condensed soft matter,which is composed of hydrophobic solid particles floating on a liquid surface.In this study,we have realized to conduct tension and shear experiments on the particle raft by using the self-assem
Combustion phenomena were discovered still in far ancient time of China.From the 50\'s of the last century,owing to the fast development of energy and power,aeronautical and astronautical,chemical and metallurgical engineering,combustion theory started