About this Research Topic
The current state of the issue of measuring the physical-mechanical properties of materials is causally linked and is a logical continuation of historical development. Today, it is exacerbated by the exposed development of technology and its requirements for knowledge of the properties of the materials being worked with. The main aspect is the level of dimensioning structural elements in terms of their functional stress, safety, and lifetime, but also cost-effectiveness and environmental harmlessness. The exposed development of technology must be met by the sufficiently rapid development of measurement of the physical-mechanical properties of the exploited materials. The present issue should contain information about recent advances in identifying stress-strain states of materials. Calculating the state of stress at any point is not trivial and easy and may require using specific software packages.
Most of the time, engineers are dealing with engineering stress and strain. True strain only diverges from engineering strain when the material starts to deform plastically what is accompanied by the formation of a neck. At that point, it is still far away from the elastic region, which allows one to predict the material's behaviour reasonably. However, it is known that true strain and stress are important to material scientists and metallurgists in their request to understand how the material reacts under certain conditions. In traditional procedures, obtaining a number of very important physical-mechanical parameters with the required accuracy is problematic. It is, for example, a sufficiently accurate determination of young’s modulus of elasticity, yield strength, tensile strength, or strength limits, including remaining uncertainties in the measurement and analytical processing of the stress-strain relationship in the plastic area of material transformation, which is the most important for the safety, stability, and durability of buildings, structures, and machines. It results in seriously justified demands for the search for new precise procedures for testing materials and for new knowledge of theoretical and applied elasticity-strength and mechanics.
The current Research Topic aims to cover promising, recent, and novel research trends in the identification of stress-strain states of the material. Areas to be covered in this Research Topic may include, but are not limited to:
• Advanced techniques in the measurement of stress-strain states
• Novel methods of identification of stress-strain states of material
• Determination of stress-strain states of non-traditional engineering materials
• Modelling and simulation of stress-strain states of materials after technological or surface processing
• Stress-strain states in the surface layers of materials and their influence on operational properties of machine parts
Most of the time, engineers are dealing with engineering stress and strain. True strain only diverges from engineering strain when the material starts to deform plastically what is accompanied by the formation of a neck. At that point, it is still far away from the elastic region, which allows one to predict the material's behaviour reasonably. However, it is known that true strain and stress are important to material scientists and metallurgists in their request to understand how the material reacts under certain conditions. In traditional procedures, obtaining a number of very important physical-mechanical parameters with the required accuracy is problematic. It is, for example, a sufficiently accurate determination of young’s modulus of elasticity, yield strength, tensile strength, or strength limits, including remaining uncertainties in the measurement and analytical processing of the stress-strain relationship in the plastic area of material transformation, which is the most important for the safety, stability, and durability of buildings, structures, and machines. It results in seriously justified demands for the search for new precise procedures for testing materials and for new knowledge of theoretical and applied elasticity-strength and mechanics.
The current Research Topic aims to cover promising, recent, and novel research trends in the identification of stress-strain states of the material. Areas to be covered in this Research Topic may include, but are not limited to:
• Advanced techniques in the measurement of stress-strain states
• Novel methods of identification of stress-strain states of material
• Determination of stress-strain states of non-traditional engineering materials
• Modelling and simulation of stress-strain states of materials after technological or surface processing
• Stress-strain states in the surface layers of materials and their influence on operational properties of machine parts
Keywords: stress, strain, modeling, materials, mechanical properties
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