ASTM D5538 is the Standard Test Method for determination of Mode I Interlaminar Fracture Toughness of Unidirectional Fiber-Reinforced Polymer Matrix Composite materials. This test is used for establishing an allowable design that is useful for analyzing the damage of composite structures.
ASTM D5528 test is used for determining opening Mode I interlaminar fracture toughness of continuous fiber-reinforced composites. This is accompanied by using modified beam theory or compliance calibration method. The test is used to measure the critical value of delamination growth due to opening load. The delamination growth is denoted by strain energy release rate and also by how the load is applied. It is also used for establishing an allowable design that is useful for analyzing the damage of composite structures.
For the ASTM D5528 test, the sample used is a double cantilever beam (DCB) which is a rectangular, unidirectional laminated composite with a non-adhesive film on the mid-plane used as a delamination initiator. The DCB test samples are prepared with the non-adhesive insert on the midplane of the laminate. The width and thickness measurements are noted as specified by the test. The initial delamination length is measured from the load line to the end of the insert. The required delamination length is about 50 mm (2.0 inches).
Both edges of the sample are marked just ahead of the insert. Using a room temperature cure adhesive, the load blocks are bonded to the top and bottom surface of the end of each sample. It is ensured that the load blocks can sustain the maximum expected load. Then, the optical microscope or a magnifying device is mounted on one side of the sample to observe the motion of the delamination front in the ASTM D5528 test. The opening load is applied at a constant crosshead rate within 1 and 5 mm/min unless an increase in delamination growth of 3 to 5 mm appears. The load and displacement values are noted regularly. The delamination length is recorded on the side of the sample from the marks and the data points are also recorded on the load-displacement curve if the visual onset of delamination is observed. The sample is unloaded at a fixed crosshead rate of 25 mm/min. Also, the load and displacement date is noted while unloading. The position of the tip of the pre-crack is marked on both edges. Then, the sample is reloaded at the same initial fixed speed of 1 to 5 mm/min. Again, the load and displacement data are recorded continuously.
The typical sample length for ASTM D5528 is at least 127 mm (5.0 inches), the typical laminate thickness is 3 to 5 mm (0.12 to 0.2 inches), and the standard width is 20 to 25 mm (0.8 to 1.0 inches).
Interlaminar Fracture Toughness
Hence, ASTM D5528 is a standard test method for mode I interlaminar fracture toughness of unidirectional fiber-reinforced polymer matrix composites.
ASTM E572 test method covers the analysis of stainless and alloy steels by Wavelength Dispersive X-ray Fluorescence Spectrometry (WDXRF). It provides rapid, multi-element determinations with sufficient accuracy to assure product quality.
The ASTM D2674 is a standard test method for the analysis of sulfochromate etches solution used in the surface preparation of aluminum. The ASTM D2674 standard specifies a method for determining the efficacy of an etchant used to prepare the surface of aluminum alloys for subsequent adhesive bonding.
An immunological method for quantization of Hevea Natural Rubber (HNRL) proteins using rabbit anti-HNRL serum. Rabbits immunized with HNRL proteins react to the majority of the proteins present, and their sera have the capability to detect most if not all the proteins in HNRL.
ASTM G65 measures the resistance of metallic materials to abrasion using the dry sand/rubber wheel apparatus. The quality, durability, and toughness of the sample are determined using this test. Metallic materials are ranked in their resistance to scratching abrasion under a controlled environment.
ASTM E2141 test methods provide accelerated aging and monitoring of the performance of time-dependent electrochromic devices (ECD) integrated in insulating glass units (IGU). This test helps to understand the relative serviceability of electrochromic glazings applied on ECD.
ASTM C724 test method is used in analyzing the quality and ease of maintenance of a ceramic decoration on architectural-type glass. This test method is useful in the acknowledgment of technical standards.
Send us a request
Process for testing
You share material and testing requirements with us
We ensure your sample pick-up in an ensured manner
We deliver test report to your inbox
Just share your testing requirements and leave the rest on us!
Free, no-obligation consultation
Quick turnaround time
Let us combine our capabilities to achieve success!!