The double cantilever beam (DCB) test (ASTM D5528) is the most widely used test method for measuring Mode I fracture toughness of unidirectional composites. The specimens are ∼125 mm long, 20–25 mm wide, and 3–5 mm thick.

2023年3月1日 · This paper presents a test method, the Guided Double Cantilever Beam (GDCB), to measure mode I interlaminar fracture toughness in composites laminates under intermediate/high loading rates using a novel device. The proposed tool is based on a modified DCB test method with a guided tensile configuration.

2023年9月23日 · ASTM D5528是一项广泛应用的测试规范，用于测定连续纤维增强复合材料的开口模式I层间断裂韧性。 该测试使用了一种特殊的样品，即DCB样品。 这些样品由两个悬臂梁构成，中间夹有一层非粘性薄膜，其作用是引发裂纹并控制裂纹扩展。 通过在样品上施加加载并记录裂纹扩展的力学响应，可以测定材料的断裂韧性。 在本文中，科准测控小编将详细介绍标准下复合材料断裂韧性测试的原理和内容，包括样品制备、实验装置、数据分析和结果解释。 我们还将 …

The double cantilever beam (DCB) test is the most commonly used method for measuring the initiation and propagation values of Mode I fracture energy G I under static and cyclic loading conditions (see ASTM D3433, BS 7991 and ISO 25217).

2016年2月24日 · Das quantitative Ergebnis und seine hohe Sensitivität erlauben dem DCB-Test als einzigem verschiedene Stähle für Ölfeldrohre in Hinblick auf ihre Beständigkeit gegen wasserstoffinduzierte Spannungsrisskorrosion zu unterscheiden. Durch seine Genauigkeit und Robustheit ist der DCB-Test konkurrenzlos als Instrument der Qualitätssicherung.

Through-the-thickness stitching dramatically improves the interlaminar fracture toughness of laminated composites. Currently theDouble Cantilever Beam (DCB) test is being used for determining the...

1999年4月25日 · DCB testis used to identify~ the threshold stress intensity factor or the critical environmental fracture toughness (Klssc) below which a material can be employed safely and confidently. On the basis of Klssc data, the operational limits of tubular goods for known defects can be calculated, and critical flaw sizes for the maximum cross section ...

2008年3月16日 · The NACE TM0177 Method D [1] (DCB) test is now a common method test method for specifying the performance of steel for sour service. The DCB (double cantilever beam) test is meant to give a measure of material resistance to cracking mechanisms such as sulfide stress cracking.

2021年6月22日 · Double-cantilever beams (DCBs) are widely used to study mode-I fracture behavior and to measure mode-I fracture toughness under quasi-static loads. Recently, the authors have developed analytical solutions for DCBs under dynamic loads with consideration of structural vibration and wave propagation.

powerful test for measuring the sulfide stress cracking (SSC) resistance of steels used in sour oil and gas wells throughout the world. The quantitative nature and high sensitivity of the test make it uniquely capable of discerning the effects of variations in steel chemistry, and of the many