1117 results about "Elastic plastic" patented technology

The invention relates to a performance-based aseismic design method. The multi-objective performance-based aseismic design method of an engineering structure includes the following steps: (1) providing performance objectives achieved by the engineering structure; (2) inputting different performance objectives into a single degree-of-freedom elastic-plastic structural system to perform simulation tests; (3) adjusting magnitude of aseismic wave continuously, determining functional relationship between the aseismic influence coefficient and the structural period when the different performance objectives are achieved, and obtaining an aseismic demand spectrum curve; (4) obtaining the relationship between shearing force and displacement of the engineering structure by using an analytical method; (5) converting the relationship between the shearing force and the displacement of the engineering structure into a functional relationship between the capacity and the displacement under the single degree-of-freedom system, and obtaining a structural capacity spectrum curve; (6) according to the structural period, comparing the relationship between the capacity spectrum curve and the aseismic demand spectrum curve, and estimating structure aseismic capability under different performance objectives. The engineering structure multi-objective performance-based aseismic design method is used for estimating aseismic performance of the engineering structure and designing aseismic construction according to the estimating results of the engineering structure.

A footwear with improved straps, which has a sole, a first strap, which has a hollow tubular strap body made from elastic plastics or rubber, a first mounting portion disposed at one end of the strap body and affixed to said sole and a second mounting portion disposed at the opposite end of the strap body, and a second strap, which has a hollow tubular strap body made from elastic plastics or rubber and connected to the second mounting portion of the strap body of the first strap and two mounting portions respectively disposed at the two distal ends of the strap body thereof and respectively affixed to the sole. In an alternate form of the invention, the first strap and the second strap are respectively affixed to the sole and set apart.

The invention discloses a multi-scale simulation method for mechanical behaviors of a multi-phase composite material, and belongs to the field of multidisciplinary intersection of computational material science, analog simulation, high-throughput calculation and the like. Various physical property parameters needed by finite element simulation of the macroscopic scale can be obtained through calculation of the first principle of the nanoscopic scale, molecular dynamics simulation of the microcosmic scale and thermodynamic calculation of the mesoscopic scale, and the physical property parameters comprise elastic-plastic physical parameters of all phases in the composite material at different temperatures and different grain sizes and the like. A real material tissue structure is obtained byutilizing a focused ion beam experiment and image processing introduction. Through parameter coupling and parameter transmission among scale calculation results and combination with the structure ofthe material, mechanical behaviors such as stress-strain relationship, stress distribution and evolution and plastic deformation of the multi-phase composite material under complex stress and different temperatures can be simulated.