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...
应变作为基本概念，在学术与工程领域中广泛应用。其中，我们接触到的“名义/工程应变”与“真实/指数应变”是两种不同的应变表示方法，它们之间既有联系也有差异。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...
Engineering strain rateTrue strain rateKolsky barPulse shapingConstant strain rate304 Stainless steelKolsky 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 ...
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....
A more convenient measure is the true strain ε. The definition of true strain is by natural logarithm of total length l over initial length l0 (it is also referred to as logarithmic strain): (3.2)ε=ln(ll0) To illustrate this once more: If two forming processes executed in series add...
工程应变与应力(Engineering strain and stress) 基于初始几何尺寸定义,又称名义应力(normal stress)和名义应变(normal strain)。 对数应变与真实应力(Logarithmic strain and true stress) 基于当前几何尺寸来定定义,又称真实应力应变。 真实应力: 对数应变推导: ...
Engineering stress-strain curve and true stress-strain curve are equal up to .A.Elastic limitB.Yeild pointC.Tensile strength pointD.Proportional limit的答案是什么.用刷刷题APP,拍照搜索答疑.刷刷题(shuashuati.com)是专业的大学职业搜题找答案,
Engineering stress (MPa)Engineering strain 3100.10 3350.22 Using this information, compute the engineering stress necessary to produce an engineering strain of 0.25. Engineering Stress and True Stress: Trues stress is defined as the ratio of instantaneous force to the instantaneous...
The ultimate tensile strength is the engineering stress value or σuts, at the maximum of the engineering stress-strain curve. It represents the maximum load, for that original area, that the sample can sustain without undergoing the instability of necking, which will lead inexorably to fracture....
aThe true stress-strain curves are then calculated with the equations (3.2) and (3.3), in which σ and ε are the true stress and strain and s and e are the engineering stress and strain. 真压力类型的曲线然后跟等式一起被计算 (3.2) 和 (3.3),其中 s 和 e 是真的压力和紧靠和 s 和 ...