The load–deformation, or stress–strain relationship that characterizes a material can also be described in terms of whether it is linear or nonlinear. In linear materials, stress is directly proportional to strain, by a constant factor known as the Young's modulus. Nonlinear materials, on the...
As an elastic material is stretched, it will also contract in a direction perpendicular to the applied force inducing a compressive strain in the material at right angles to the line of action of the tensile force. This strain, known as the lateral strain, is directly proportional to the ...
Proportional limit is the highest stress at which stress is directly proportional to strain. It is obtained by observing the deviation from the straight-line portion of the stress-strain curve. Elastic limit is the greatest stress the material can withstand without any measurable permanent strain rem...
In this region, the stress and strain are directly proportional比例的, and the behavior of the material is said to be linear elastic线性弹性 elastic?limit??弹性极限 elastic body 弹性体 deformable body [可]变形体 Proportional Limit - The point at which the stress-strain curve becomes non-...
Strain is a measure of the deformation of a material under the influence of an external force. It represents the amount of deformation that occurs in a material when subjected to stress. Strain is defined as the ratio of the change in length (or other dimensions) of a material to its orig...
Stress and strain are related by the material's Young's modulus, which is a measure of the material's stiffness. The relationship between stress and strain is linear for most materials within their elastic limit, meaning that the strain is directly proportional to the stress applied. ...
The Haagen-Poisseuille equation indicates that shear stress is directly proportional to blood flow rate and inversely proportional to vessel diameter. Figure 3.Shear stress-rate relationship for Newtonian(n=1)and non-Newtonian(n>1 or n<1)fluids ...
We have determined the stress/strain response of PAA microbeads by applying a range of pressures and observing the resultant volume decrease (Fig. 2). In an elastic region of deformation (compression below 15%), the stress is linearly proportional to the strain. To model mechanical properties ...
We have knowledge of stress in thin films in two ways: (1) by directly measuring the crystal lattice strain in the film using X-ray diffraction [17] and (2) by measuring the elastic deformation of the substrate, usually a single crystal silicon wafer. The wafer becomes curved due to the...
The second approach assumes that the interfacial shear stress is directly proportional to the composite stress. On this scheme, up to 0·8% composite strain, τ is quantitatively identical to that predicted by the first model and it also increases linearly with composite strain. At higher strains...