真实/指数应变 即true strain / logarithmic strain:εtrue=lnL1L0 真实的应变,是基于变形后的长度积分得到的,因为表现形式是指数的形式,所以也可以称为指数应变。 名义/工程应变 nominal strain / engineering strain:εnominal=ΔLL0 名义应变,”名义“是指我们不考虑一步步的中间过程,只看开始和结尾,根据两者的...
真实应变(True Strain),也称为对数应变,是基于变形梯度张量的对数定义的,适用于大变形情况下更为准确地描述材料的变形行为。真实
Engineering strain/stress是一个更宏观的概念，true strain/stress则更接近微观。两张图解决你所有疑问。...
工程应变，即名义应变，指的是在工程计算中，将初始长度与最终长度的比值作为应变的量度。它不考虑变形过程中的每一个微小步骤，简化了实际变形的复杂性，便于工程应用。真实应变，或称为指数应变，基于变形后的长度进行积分求得。真实应变的计算方法更接近实际变形情况，但由于其指数形式，因此得名。在材料...
true strain=ln(1+engineering strain)
Kolsky bar (split Hopkinson pressure bar) with a pulse shaping technique was utilized to study the dynamic behavior of 304 stainless steel at high constant engineering and true strain rates. To show the differences between the strain rates, equations were presented for the engineering strain rate ...
Enter the engineering strain as 0.1. The true strain calculator will return 0.09531 as the value of the true strain. Fill in the engineering or nominal stress as 8 MPa. Using the true stress calculator: σ=8×(1+0.8)=8.8 MPaσ=8×(1+0.8)=8.8 MPa FAQs What is the difference between ...
A standard uniaxial tensile test, which establishes the engineering stress-strain relationship, in general, provides the basic mechanical properties of steel required by a structural designer. Modern numerical analysis techniques used for analysis of large strain problems such as failure analysis of steel...
(1) and (3), the true-stress-true-strain curve is always to the left of the engineering curve until the maximum load is reached. However, beyond maximum load the high-localized strains in the necked region that are used in Eq. (4) far exceed the engineering strain calculated from Eq....
摘要: The article deals with a possibility of structure of approximate true stress-true strain diagram using the engineering stress-strain curve and mechanical properties of material. A possibility to define the curve more precisely behaind the point of instability is demonstraited....