ANALYSIS OF EXPERIMENTAL DATA TO EQUIP A MATHEMATICAL MODEL OF WOOD WITH DEFORMATION AND STRENGTH PARAMETERS
Wood due to a number of specific properties (relatively low density, relatively high strength, low thermal conductivity, manufacturability) has become widespread not only in construction, but also in some areas of technology. Every year, a huge number of containers with radioactive substances, spent nuclear fuel, ammunition components, etc. are transported in the world. Ensuring the safety of transporting such substances and products by air, road, sea and rail transport is of great importance due to the potential risk of damage during transportation damage to people, the environment and property. The design of the container must withstand, without depressurization and damage to the contents, significant dynamic loads that may occur during an emergency fall of the container from the vehicle or during unloading and loading operations. As one of the damping materials that can mitigate the consequences of such intense dynamic effects on containers and their contents, wood is used, since the property is deformed under compression across the fibers up to 30-40%, and for some species up to 70%, at almost constant stress, limits the load transmitted through it by the value of the tensile strength. In order to reliably calculate the behavior of containers in this case, data are needed on the properties of the wood used under impact, in particular, dynamic deformation diagrams. The purpose of this work is to analyze publications containing the results of an experimental study of wood deformation to identify parameters and subsequent verification of its mathematical model as a unidirectionally reinforced elastoplastic material implemented in the Dynamics-3 computer complex.