For many years, researchers have been looking for a reliable law that will take into account the type of loading, the mechanical characteristics of the material, the geometric configuration in the determination of the...For many years, researchers have been looking for a reliable law that will take into account the type of loading, the mechanical characteristics of the material, the geometric configuration in the determination of the service life of mechanical parts. The service life of structures at risk (automotive, aeronautics, among others.) in service, subjected to variable solicitations in time, are random for a same type of loading. This article proposes to highlight the influence of this variation in service life on the reliability of structures by a probabilistic approach. The characteristics of the proposed law are satisfactory compared to the classical laws because it takes into account the parameters of the classical laws (Weibull law) and the dispersions of the lifetimes of a same material.展开更多
The recovery of thermoplastics has a major impact on our cities,both in terms of the environmental impact of waste disposal and the economic impact of its use in construction materials.The aim of this study is to manu...The recovery of thermoplastics has a major impact on our cities,both in terms of the environmental impact of waste disposal and the economic impact of its use in construction materials.The aim of this study is to manufacture bricks from recycled thermoplastics,more specifically low-density polyethylene(LDPE)packaging from households and landfill sites in the 9th arrondisse-ment.The technological evolution that humanity has undergone in recent years has made a wide variety of building materials available,and the use of earth as a material will make use of certain secondary products known as ad-ditives.These additions may be of mineral,animal or vegetable origin,and also of low purchasing power,but create a very strong bond once they are combined.The main aim of the present work is to contribute to the character-ization of bricks produced from thermoplastics and a soil sample taken from the bank of the Chari at Toukra in the 9th arrondissement of the capital,which are resistant to natural hazards such as bad weather and flooding,which al-ways cause enormous losses with each passing season.The results of the vari-ous tests carried out show that the material can help to overcome not only the lack of mechanical strength,but also the impermeability that is the cause of the deterioration and ruin of the building in clay without any addition modi-fying its properties.展开更多
文摘For many years, researchers have been looking for a reliable law that will take into account the type of loading, the mechanical characteristics of the material, the geometric configuration in the determination of the service life of mechanical parts. The service life of structures at risk (automotive, aeronautics, among others.) in service, subjected to variable solicitations in time, are random for a same type of loading. This article proposes to highlight the influence of this variation in service life on the reliability of structures by a probabilistic approach. The characteristics of the proposed law are satisfactory compared to the classical laws because it takes into account the parameters of the classical laws (Weibull law) and the dispersions of the lifetimes of a same material.
文摘The recovery of thermoplastics has a major impact on our cities,both in terms of the environmental impact of waste disposal and the economic impact of its use in construction materials.The aim of this study is to manufacture bricks from recycled thermoplastics,more specifically low-density polyethylene(LDPE)packaging from households and landfill sites in the 9th arrondisse-ment.The technological evolution that humanity has undergone in recent years has made a wide variety of building materials available,and the use of earth as a material will make use of certain secondary products known as ad-ditives.These additions may be of mineral,animal or vegetable origin,and also of low purchasing power,but create a very strong bond once they are combined.The main aim of the present work is to contribute to the character-ization of bricks produced from thermoplastics and a soil sample taken from the bank of the Chari at Toukra in the 9th arrondissement of the capital,which are resistant to natural hazards such as bad weather and flooding,which al-ways cause enormous losses with each passing season.The results of the vari-ous tests carried out show that the material can help to overcome not only the lack of mechanical strength,but also the impermeability that is the cause of the deterioration and ruin of the building in clay without any addition modi-fying its properties.
