1.1本试验方法包括在环境条件下测定具有二维蜂窝通道结构的高级陶瓷结构的弯曲强度（弯曲断裂模量）。 1.2试验方法的重点是具有纵向空心通道的工程陶瓷部件，通常称为 “ 蜂窝状 ” 频道。（见图1。）组件通常具有30%或更大的孔隙率，并且蜂窝通道的横截面尺寸约为1毫米或更大。 具有这些蜂窝结构的陶瓷被广泛应用（催化转化支架 (1) ，高温过滤器 (2, 3) ，燃烧燃烧器板 (4) ，能量吸收和阻尼 (5) 等）。蜂窝陶瓷可以在一系列陶瓷成分中制造 氧化铝、堇青石、氧化锆、尖晶石、莫来石、碳化硅、氮化硅、石墨和碳。组件以各种几何形状（块、板、圆柱体、杆、环）生产。 1.3本试验方法描述了两种试样几何形状，用于测定多孔蜂窝陶瓷试样的弯曲强度（断裂模量）（见图。 2): 1.3.1 试验方法A — 具有用户定义的试样几何形状的4点或3点弯曲试验，以及 1.3.2 试验方法B — A 4点- ¼ 使用定义的矩形试样几何形状（13 mm）进行点弯曲试验 × 25毫米 × >116 mm）和90 mm外支撑跨度几何形状，适用于小孔径堇青石和碳化硅蜂窝。 1.4试样承受破坏应力，断裂力值、试样和单元尺寸以及加载几何数据用于计算标称梁强度、壁断裂强度和蜂窝结构强度。 1.5测试结果用于材料和结构开发、产品表征、设计数据、质量控制和工程/生产规范。 1.6本试验方法适用于线弹性拉伸破坏的陶瓷材料。本试验方法不适用于以弹性或弹性延性方式失效的聚合物或金属多孔结构。 ====意义和用途====== 本试验方法用于测定具有多个纵向空心通道的工程陶瓷构件的弯曲力学性能，通常描述为: “ 蜂窝状 ” 通道架构。组件通常具有30%或更大的孔隙率，并且蜂窝通道的横截面尺寸约为1毫米或更大。 本试验方法的实验数据和计算强度值用于材料和结构开发、产品表征、设计数据、质量控制和工程/生产规范。 笔记 1-弯曲试验是确定标称值的首选方法 “ 拉伸断裂 ” 与压缩（压碎）试验相比，这些部件的强度。需要标称抗拉强度，因为这些材料在热梯度应力下通常会发生拉伸失效。由于夹持和对准的挑战，很难对这些蜂窝试样进行真正的拉伸试验。 本试验方法确定的机械性能取决于材料和结构，因为多孔试样的机械响应和强度是由固有材料特性和微观结构以及通道孔隙率的结构[孔隙率/相对密度、通道几何形状（形状、尺寸、细胞壁厚度等）的组合决定的。 )，各向异性和均匀性等。测试数据的比较必须考虑材料/成分特性的差异以及单个样本之间通道孔隙度结构的差异以及样本批次之间和内部的差异。

1.1 This test method covers the determination of the flexural strength (modulus of rupture in bending) at ambient conditions of advanced ceramic structures with 2-dimensional honeycomb channel architectures. 1.2 The test method is focused on engineered ceramic components with longitudinal hollow channels, commonly called “ honeycomb ” channels. (See Fig. 1.) The components generally have 30 % or more porosity and the cross-sectional dimensions of the honeycomb channels are on the order of 1 millimeter or greater. Ceramics with these honeycomb structures are used in a wide range of applications (catalytic conversion supports (1) , high temperature filters (2, 3) , combustion burner plates (4) , energy absorption and damping (5) , etc.). The honeycomb ceramics can be made in a range of ceramic compositions alumina, cordierite, zirconia, spinel, mullite, silicon carbide, silicon nitride, graphite, and carbon. The components are produced in a variety of geometries (blocks, plates, cylinders, rods, rings). 1.3 The test method describes two test specimen geometries for determining the flexural strength (modulus of rupture) for a porous honeycomb ceramic test specimen (see Fig. 2): 1.3.1 Test Method A — A 4-point or 3-point bending test with user-defined specimen geometries, and 1.3.2 Test Method B — A 4-point- ¼ point bending test with a defined rectangular specimen geometry (13 mm × 25 mm × > 116 mm) and a 90 mm outer support span geometry suitable for cordierite and silicon carbide honeycombs with small cell sizes. 1.4 The test specimens are stressed to failure and the breaking force value, specimen and cell dimensions, and loading geometry data are used to calculate a nominal beam strength, a wall fracture strength, and a honeycomb structure strength. 1.5 Test results are used for material and structural development, product characterization, design data, quality control, and engineering/production specifications. 1.6 The test method is meant for ceramic materials that are linear-elastic to failure in tension. The test method is not applicable to polymer or metallic porous structures that fail in an elastomeric or an elastic-ductile manner. ====== Significance And Use ====== This test method is used to determine the mechanical properties in flexure of engineered ceramic components with multiple longitudinal hollow channels, commonly described as “ honeycomb ” channel architectures. The components generally have 30 % or more porosity and the cross-sectional dimensions of the honeycomb channels are on the order of 1 millimeter or greater. The experimental data and calculated strength values from this test method are used for material and structural development, product characterization, design data, quality control, and engineering/ production specifications. Note 1—Flexure testing is the preferred method for determining the nominal “ tensile fracture ” strength of these components, as compared to a compression (crushing) test. A nominal tensile strength is required, because these materials commonly fail in tension under thermal gradient stresses. A true tensile test is difficult to perform on these honeycomb specimens because of gripping and alignment challenges. The mechanical properties determined by this test method are both material and architecture dependent, because the mechanical response and strength of the porous test specimens are determined by a combination of inherent material properties and microstructure and the architecture of the channel porosity [porosity fraction/relative density, channel geometry (shape, dimensions, cell wall thickness, etc.), anisotropy and uniformity, etc.] in the specimen. Comparison of test data must consider both differences in material/composition properties as well as differences in channel porosity architecture between individual specimens and differences between and within specimen lots.