ASTM D638 规定了五种标准试样类型：Type I：标准试样，适用于大多数塑料（推荐用于厚度 7mm 以下的塑料）。Type II：小型试样，适用于有限材料量或薄片材料。Type III：更小尺寸的试样，适用于极限材料使用情况。Type IV：更宽的试样，用于薄膜或柔性塑料。Type V：微型试样，适用于少量材料（如微注塑制品）。AST...
ASTM D638 规定了五种标准试样类型: Type I:标准试样, 适用于大多数塑料(推荐用于厚度 7mm 以下的塑料)。 Type II:小型试样, 适用于有限材料量或薄片材料。 Type III:更小尺寸的试样, 适用于极限材料使用情况。 Type IV:更宽的试样, 用于薄膜或柔性塑料。 Type V:微型试样, 适用于少量材料(如微注塑制品)。
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1. The Type I specimen is the preferred specimen and shall be used where sufficient material having a thickness of 7 mm [0.28 in.] or less is available. The Type II specimen may be used when a material does not break in the narrow section with the preferred Type I specimen. The Type...
ASTM D638 Type Ⅳ 哑铃型裁切刀具有中心位置带有自动顶出功能,裁切完成后自动弹出样品;内刃式设计,切削刃被完全保护起来,避免使用过程中割伤的风险;采用双面切削刃,对称式设计,刀刃两侧承受相同的表面压力,保证裁切后的样品截断面完全垂直,确保样品几何尺寸精确;刀片采用粉末冶金刀具钢打造,一体式设计,具有超长的耐用...
Specified speed of testing varies depending on the specimen type and plastic rigidity. Note: Tensile properties determined include tensile stress (strength) at yield and at break, percentage elongation at yield or at break and modulus of elasticity. Also called ASTM method D638-84. See also ...
Terminology 5.1 Testing Machine—A testing machine of the constant- 3.1 Definitions—Definitions of terms applying to this test rate-of-crosshead-movement type and comprising essentially method appear in Terminology D883 and Annex A2. the following: 5.1.1 Fixed Member—A fixed or ...
It is recognized that the constant rate of crosshead movementtype of test leaves much to be desired from a theoretical standpoint, thatwide differences may exist between rate of crosshead movement and rateof strain between gage marks on the specimen, and that the testing speedsspecif i ed ...
Dumbbell type:The dumbbell dimensions are modulated as a function of the material’s thickness. Sample cutting is of paramount importance for obtaining accurate and reproducible test results. Dumbbell-shaped specimens have a gauge length of 25 mm or 50 mm; a gauge length of 50 mm is recommended...
ASTM D638-14 Type IV横向和纵向拉伸试样棒Re**份爱 上传90.91 KB 文件格式 zip ASTM是美国材料和试验协会的简称,指的是该组织所发布的一系列材料测试方法和标准。其中ASTM D638是ASTM所制定的用于测量塑料拉伸性能的标准测试方法。拉伸指标是衡量材料抗拉强度或材料在受力下延伸程度的能力的参数。通过进行拉伸试验...