As a typical brittle material,glass is widely used in construction,transportation,shipbuilding,aviation,aerospace and other industries.The unsafe factors of glass mainly come from its rupture.Thus,establishing a set o...As a typical brittle material,glass is widely used in construction,transportation,shipbuilding,aviation,aerospace and other industries.The unsafe factors of glass mainly come from its rupture.Thus,establishing a set of prediction models for the cracks growth of glass under dynamic load is necessary.This paper presents a contact damage model for glass based on the ordinary state-based peridynamic theory by introducing a contact force function.The Hertz contact(nonembedded contact)problem is simulated,and the elastic contact force is determined by adjusting the penalty factor.The proposed model verifies the feasibility of penalty-based method to simulate the contact problem of glass.The failure process of glass specimen under impact is simulated,where two loading methods,the drop ball test and the split Hopkinson pressure bar are considered.Numerical results agree well with the experimental observations,thereby verifying the effectiveness of the proposed model.展开更多
It is pointed out by the ordinary theory and experiment of the Cerenkov radiation that the Cerenkov radiation of continuum spectra will be produced when the velocity of the charged particles is faster than the phase v...It is pointed out by the ordinary theory and experiment of the Cerenkov radiation that the Cerenkov radiation of continuum spectra will be produced when the velocity of the charged particles is faster than the phase velocity c/n of photons in the medium through which they are moving. The moving direction of photons is determined by the following formula:展开更多
1.具有(特征):a)with+名词(具体事物):He was an ordinary-looking little manwith thick glasses.b)with+名词(抽象).表示抽象的属性和特征:No one likes a person with bad manners.2.伴随着(表示附带的情况):Don’t speak with your ...1.具有(特征):a)with+名词(具体事物):He was an ordinary-looking little manwith thick glasses.b)with+名词(抽象).表示抽象的属性和特征:No one likes a person with bad manners.2.伴随着(表示附带的情况):Don’t speak with your mouth full of food.展开更多
基金This study was funded by National Natural Science Foundation of China(Nos.11932006,U1934206)Recipient:Qing Zhang.And National Natural Science Foundation of China(No.12002118)+1 种基金Recipient:Xin Gu.And Natural Science Foundation of the Jiangsu Higher Education Institutions of China(No.20KJB580015)Recipient:Runpu Li。
文摘As a typical brittle material,glass is widely used in construction,transportation,shipbuilding,aviation,aerospace and other industries.The unsafe factors of glass mainly come from its rupture.Thus,establishing a set of prediction models for the cracks growth of glass under dynamic load is necessary.This paper presents a contact damage model for glass based on the ordinary state-based peridynamic theory by introducing a contact force function.The Hertz contact(nonembedded contact)problem is simulated,and the elastic contact force is determined by adjusting the penalty factor.The proposed model verifies the feasibility of penalty-based method to simulate the contact problem of glass.The failure process of glass specimen under impact is simulated,where two loading methods,the drop ball test and the split Hopkinson pressure bar are considered.Numerical results agree well with the experimental observations,thereby verifying the effectiveness of the proposed model.
文摘It is pointed out by the ordinary theory and experiment of the Cerenkov radiation that the Cerenkov radiation of continuum spectra will be produced when the velocity of the charged particles is faster than the phase velocity c/n of photons in the medium through which they are moving. The moving direction of photons is determined by the following formula:
文摘1.具有(特征):a)with+名词(具体事物):He was an ordinary-looking little manwith thick glasses.b)with+名词(抽象).表示抽象的属性和特征:No one likes a person with bad manners.2.伴随着(表示附带的情况):Don’t speak with your mouth full of food.
