In-plane shear strain rate tensor is a term used in mechanical engineering and solid mechanics to describe the rate of change of in-plane normal strains produced by an applied shear force. It is a vector-valued function, which describes the rate of shear strain along a 2D plane. It is represented as a second order tensor, containing six independent components which are used to calculate the shear strain in a given direction on a 2D plane.
In-plane shear strain is the most commonly used strain rate measure since it can be used to investigate how an applied shear force affects an object. It is also used to characterize the rigidity of materials under different loading conditions, including fatigue, creep and fracture. The in-plane shear strain rate is related to the amount of stress applied to an object, and can provide useful insights into the structural integrity of the object.
The in-plane shear strain rate tensor can be derived from the stress-strain relationship and the elasticity equation. It is defined as the derivative of the strain tensor along a specific line in the plane. This line is often referred to as the “free-edge” and is a line of maximum strain rate. The shear strain rate tensor can also be derived from a displacement field, which is derived from measurements of the material’s displacement under an applied load.
In-plane shear strain rate tensor is best used in structural materials because it considers the effect of the shear force on the material’s physical properties. It is especially useful in the study of materials behavior in response to repeated loading, such as vibration and fatigue. This type of loading is typically characterized by a rapid increase in the strain rate, followed by a period of gradual strain rate decrease due to the internal rearrangement of atoms and molecules within the material. The in-plane shear strain rate is useful in understanding this behavior.
The in-plane shear strain rate tensor is a powerful tool for engineers who are designing structures and materials under dynamic loading. It can also be used to distinguish between different types of material behavior, such as strain-hardening, strain-rate hardening, and strain-softening. By knowing the in-plane shear strain rate, engineers can identify the best material for a particular application and determine the optimum design configuration.
In conclusion, the in-plane shear strain rate tensor is a useful tool for mechanical engineers and solid mechanics to consider when designing for dynamic loading. It can help identify the best material for a given application, and can be used to study the dynamic behavior of materials. By understanding how the strain rate changes as a result of an applied shear force, engineers can design structures and materials that are more resilient to dynamic loading.