ASTM D6671

Engineered in strict accordance with ASTM D6671, our Mixed Mode Bending (MMB) fixture is designed to determine the interlaminar fracture toughness (Gc) of continuous fiber-reinforced composite materials. Featuring an integrated graduated scale for precise anvil adjustment, it allows users to accurately control the Mode I to Mode II loading ratio. Constructed from robust steel and aluminum alloy, this fixture ensures vertical loading and minimizes non-linear effects, delivering reliable data for advanced composite material design and damage tolerance evaluation.

Overview

Designed in accordance with the ASTM D6671 standard, this Mixed Mode Bending (MMB) fixture is engineered to determine the interlaminar fracture toughness (Gc) of continuous fiber-reinforced composite materials under various Mode I to Mode II loading ratios. This method aims to evaluate the toughness characteristics of composite materials, providing essential data support for structural design applications.

Design Features and Benefits

Adjustable Loading Ratios:
By utilizing the mixed mode bending test apparatus, users can easily adjust the loading ratio to simulate various mixed-mode conditions, from pure Mode I to pure Mode II and any combination in between.
Precision Scale:
Equipped with an integrated graduated scale, facilitating precise adjustment and control of the distance between the upper and lower loading anvils, ensuring consistent and repeatable test setups.
Accurate Loading Control:
The fixture maintains vertical loading and controls non-linear effects during the test. The sophisticated fixture design and strict loading control ensure the accuracy and reliability of test results, making it an essential tool for composite material R&D.

Applications

Primary Purpose:
Used for determining the interlaminar fracture toughness of continuous fiber-reinforced polymer matrix composites. The specimen is typically a rectangular laminated structure containing a non-adhesive insert to simulate a pre-existing delamination.
Material Evaluation:
Provides critical insights into the damage tolerance and structural integrity of advanced composite materials used in aerospace, automotive, and wind energy industries.

Technical Specifications:

Parameter ACAD6671A0
(Mixed Mode I-II Fixture)
1 Part No. 1JAASD667102
2 Max Load Capacity 5 kN
3 Upper Anvil Diameter 9.5 mm
4 Lower Anvil Diameter 9.5 mm
5 Specimen Length 137 mm
6 Specimen Width 25 mm
7 Specimen Thickness 3 – 5 mm
8 Anvil Hardness 50 – 55 HRC
9 Fixture Dimensions (H×W×D) 253 × 254 × 98 mm
10 Weight 5.55 kg
11 Operating Temperature Room Temperature (RT)
12 Built Material Steel and Aluminum Alloy
13 Upper Interface Φ20, Φ31.75, Φ40 mm
Hydraulic Clamping

Related Products:

Part No. Model Code Description
1JYY1105V302 YSS105S1.00 Compression Lower Platen (200 mm / 8 inch diameter recommended)

Why Choose Us?

  • •  We provide 7×24 technical consultation, operator training, and timely software updates.

  • •  We offer remote monitoring of equipment status, enabling rapid diagnosis and resolution when abnormalities occur.

  • •  Keeping up with the latest development of widely adopted international standards from ASTM, ISO, etc. to ensureyour test results relevant and credible

  • •  Maximizing your lab investment returns with tailored solutions to your unique needs from cost effective hardware tosoftware customization

  • •  We treat everyone, be it clients, colleagues or partners, with honesty and sincerity.

  • •  Staying at the forefront of testing technologies that continuously improve test accuracy, repeatability, and eficiency


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