Test for Hoop Tensile Strength of Advanced Ceramic Tube Using Direct Pressurization ASTM C1863
ASTM C1863 is used to determine the hoop tensile strength, including stress-strain response, of continuous fiber-reinforced advanced ceramic (CFCC) tubes subjected to direct internal pressurization applied monotonically at ambient temperature. Hoop tensile strength tests provide information on the strength and deformation of materials under stresses induced from the internal pressurization of tubes.
ASTM C1863 determines the ability of a CFCC tube to withstand internal pressure. It is also known as the tube burst test because a pressurized fluid applies pressure to the inner walls until the tube bursts.
This test method is used for material development, material comparison, material screening, material down selection, and quality assurance. It is also used for material characterization, design data generation, and material model validation.
This test method is used primarily to test CFCC tubes with continuous fiber reinforcement. CFCCs are essentially ceramic matrices reinforced by fibers. The ceramic matrix and the fiber reinforcement each can be made from a wide range of materials: oxide, graphite, carbide, nitride, and other compositions. Although this test method is not intended for discontinuous fiber-reinforced, whisker-reinforced, or particulate-reinforced ceramics, it may be equally applicable to these composites.
The dimension of the composite tube is measured including its wall thickness. The composite tube is loaded by internal pressurization from a pressurized fluid. Internal pressure is exerted on the tube by the fluid. The pressure is applied either directly to the material or through a secondary bladder inserted into the tube. The pressure is monotonic (unchanging). This radial pressure on the inside of the tube results in a hoop stress-strain response. The pressure is applied until the tube bursts.
The hoop tensile strength is determined from the resulting maximum pressure and the hoop fracture strength is determined from the pressure at fracture. The stress-strain data recorded is used to determine hoop tensile strain, the hoop proportional limit stress, and the modulus of elasticity in the hoop direction.
The geometry of the tubular test specimen depends on the ultimate use of the hoop tensile strength data. Minimum five test specimens are required for estimating a mean. More may be necessary if estimates regarding the form of the strength distribution are required. Fewer tests can be conducted for an indication of material properties if material cost or test specimen availability limits the number of possible tests.
p = F/π(ritube)2
p = internal pressure F = axial force required by the tubular test specimen ritube = internal diameter of tube units of mm
Hoop Tensile Stress:
σ h= η mpX2(rtitube)2/(r0tube)2 – (rtitube)2
σ h = hoop tensile stress P = internal pressure η m = maximum stress factor ritube = inner radius of the tube r0tube = outer radius of the tube
Hoop Tensile Strain:
ɛ h= 2 ∆r/2r0tube
ɛ h = hoop tensile strain ∆r = change in radius r0tube = outer radius of the tube
Hoop Tensile Strength:
Shu= η mpmaxX2(rtitube)2/[(r0tube)2 – (rtitube)2]
Shu = hoop tensile strength pmax = maximum internal pressure η m = maximum stress factor ritube = inner radius of the tube r0tube = outer radius of the tube
Hoop Tensile Fracture Strength:
Shf= η mpfX 2(rtitube)2/[(r0tube)2 – (rtitube)2]
Shf = hoop tensile fracture pmax = internal pressure at fracture η m = maximum stress factor ritube = inner radius of the tube r0tube = outer radius of the tube
Modulus of Elasticity:
E = modulus of elasticity, ∆σh/ ∆ɛh = the slope of the (σh– εh) curve within the linear region.
v=- ɛl/ ɛh
ν = Poisson’s ratio ɛl/ ɛh = the slope of the linear region of the plot of longitudinal strain versus hoop strain
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!