The peak-strength strain energy storage index is defined as the ratio of the elastic strain energy density to the dissipated strain energy density corresponding to the peak compressive strength of rock specimen.
Here, we discuss why stored energy functions of the latter type, and similar functions that are written in terms of an initial strain, need to satisfy some restrictions to avoid unphysical behaviours.
The strain energy stored in an elastic material upon deformation is calculated below for a number of different geometries and loading conditions. These expressions for stored energy will then be used to solve some elasticity problems using the energy
The ability to store and return elastic strain energy may also provide metabolic savings over an evolutionary timescale by enabling advantageous changes to morphology and physiology, such as a reduction in limb mass or the use of slow but efficient muscle.
Highlights • The elastic strain energy storage concept is extended to characterize crack propagation in elastic–plastic materials. • A continuous loading–unloading method is utilized to eliminate plastic dissipation in designed experiments. •
Here, we discuss why stored energy functions of the latter type, and similar functions that are written in terms of an initial strain, need to satisfy some restrictions to avoid unphysical behaviours.
Such phenomena may result in strain misfits that generate internal stresses that store elastic energies, which turn out to be extremely useful for enabling functions such as shape change, locomotion, or predation.
High-enthalpy elastic metamaterials constructed from freely rotatable chiral metacells have high stiffness, large recoverable strain and improved buckling strength.
This review explores how biological systems manipulate mechanisms like atomic or protein integration into minerals, protein conformational shifts, phase transitions, and osmotic pressure to store and utilize elastic energy—functioning as "elastic energy batteries" to drive biological processes.
This review explores how biological systems manipulate mechanisms like atomic or protein integration into minerals, protein conformational shifts, phase transitions, and osmotic pressure to store and utilize elastic energy—functioning as "elastic energy batteries" to
Storage of elastic strain energy in muscles (or in tendons or apodemes in series with muscles) must imply an energy cost, since energy is needed to develop and maintain tension in muscle.
Such phenomena may result in strain misfits that generate internal stresses that store elastic energies, which turn out to be extremely useful for enabling functions such as shape change, locomotion, or predation. However, the significance of elastic energy storage has received little attention.
While energy storage is considered one of the most pressing areas of technological development, hardly any research addresses elastic energy storage based on internal strains.
To solve the problem above, the peak-strength strain energy storage index (W e t p) is introduced in this study, which is determined as the ratio of the elastic strain energy density to the dissipated strain energy density at the peak strength of rock specimen.
Based on the linear relationships between the elastic strain energy density and the total input energy density under different unloading stress levels, a method for calculating the elastic strain energy density and the dissipated strain energy density at the peak strength of rock specimen is proposed, and W e t p can then be obtained.
To obtain the strain energy storage index W e t p of rock materials at peak strength, a series of uniaxial compression and single cyclic loading-unloading uniaxial compression tests were designed and conducted on nine rock materials. Based on the experimental results, the following conclusions can be drawn:
In classical third-order elasticity theory, the strain energy function W ~ is expanded in powers of the strain. For example, if we consider the deformation from B 1 to C in figure 1, this time, assuming the deformation is infinitesimal, then the strain energy function can be written as
