抗拉强度 Tensile strength(中英文对照)
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抗拉强度 抗拉强度，表征材料最大均匀塑性变形的抗力，拉伸试样在承受最大拉应力之前，变形是均匀一致的，但超出之后，金属开始出现缩颈现象，即产生集中变形；对于没有（或很小）均匀塑性变形的脆性材料，它反映了材料的断裂抗力。符号为Rm（GB/T 228-1987旧国标规定抗拉强度符号为σb），单位为MPa。 中文名：抗拉强度 外文名：tensile strength 本 质： 材料最大均匀塑性变形的抗力 反 应： 材料的断裂抗力 符 号： Rm 单 位： MPa Tensile strength The tensile strength, the maximum resistance characterization of materials uniform plastic deformation before, tensile specimens under tensile stress, deformation is uniform, but beyond, metal appears necking phenomenon, namely produce concentrated deformation; for there is no (or very small) of brittle materials uniform plastic deformation, it reflects the fracture resistance of materials. Symbol Rm (GB/T 228-1987 old national standard tensile strength σ B symbols for units), MPa Chinese: tensile strength English Name: tensile strength This matter: material maximum uniform plastic deformation resistance Response: the fracture resistance of materials Symbol: Rm Unit: MPa 抗拉强度（tensile strength） 试样拉断前承受的最大标称拉应力。 抗拉强度是金属由均匀塑性变形向局部集中塑性变形过渡的临界值，也是金属在静拉伸条件下的最大承载能力。对于塑性材料，它表征材料最大均匀塑性变形的抗力，拉伸试样在承受最大拉应力之前，变形是均匀一致的，但超出之后，金属开始出现缩颈现象，即产生集中变形；对于没有(或很小)均匀塑性变形的脆性材料，它反映了材料的断裂抗力。符号为Rm，单位为MPa。 试样在拉伸过程中，材料经过屈服阶段后进入强化阶段后随着横向截面尺寸明显缩小在拉断时所承受的最大力（Fb），除以试样原横截面积（So）所得的应力（σ），称为抗拉强度或者强度极限（σb），单位为N/mm2（MPa）。它表示金属材料在拉力作用下抵抗破坏的最大能力。计算公式为： σ=Fb/So 式中：Fb--试样拉断时所承受的最大力，N（牛顿）； So--试样原始横截面积，cm²。 抗拉强度（ Rm）指材料在拉断前承受最大应力值。 Tensile strength The specimen breaks down before the maximum nominal tensile stress. The tensile strength of metal by the uniform plastic deformation critical value to the local concentration of plastic deformation transition metal, and the maximum bearing capacity under static tension. For plastic material, which characterize the largest resistance uniform plastic deformation, before tensile specimen under maximum tensile stress, deformation is uniform, but beyond, metal appears necking phenomenon, namely produce concentrated deformation; for there is no (or very small) of brittle materials uniform plastic deformation, it the fracture resistance of materials. Symbol Rm, unit MPa. The specimen during the stretching process, material after yield phase into the strengthening phase with lateral section size significantly reduced the maximum force in breaking time (Fb), divided by the original cross-sectional area (So) stress the (sigma), known as the tensile strength or ultimate strength (σ b), unit N/mm2 (MPa). It represents the maximum capacity of metal materials under tension of resistance to destruction. The formula for computing Sigma =Fb/So Type: the maximum force Fb-- specimen is broken, N (Newton); So-- samples the original cross-sectional area, cm ². Tensile strength (Rm) refers to the material under tensile maximum stress value. 万能材料试验机 当钢材屈服到一定程度后，由于内部晶粒重新排列，其抵抗变形能力又重新提高，此时变形虽然发展很快，但却只能随着应力的提高而提高，直至应力达最大值。此后，钢材抵抗变形的能力明显降低，并在最薄弱处发生较大的塑性变形，此处试件截面迅速缩小，出现颈缩现象，直至断裂破坏。钢材受拉断裂前的最大应力值称为强度极限或抗拉强度。 单位:N/cm2(单位面积承受的公斤力) 抗拉强度：Tensile strength. 抗拉强度=Eh，其中E为杨氏模量，h为材料厚度 目前国内测量抗拉强度比较普遍的方法是采用万能材料试验机等来进行材料抗拉/压强度的测定。 Universal material testing machine When the steel yield to a certain extent, due to internal grain rearrangement, the ability to resist deformation rose again, this time deformation develops very fast, but only with the stress increases, until the stress reaches maximum value. Thereafter, the ability to resist deformation of steel decreased significantly, and the weakest place in large plastic deformation, the cross section of the specimen rapidly shrinking, appear until necking, fracture. Steel tensile fracture of the maximum stress value is called the ultimate strength or tensile strength. 本文来源：https://www.wddqw.com/doc/e262aac10a75f46527d3240c844769eae109a374.html