TUBE - SPACE GRADE - HR40 - EPOXY - UNIDIRECTIONAL - 0.750 x 0.832 x 72.0 inch

Name: TUBE - SPACE GRADE - HR40 - EPOXY - UNIDIRECTIONAL - 0.750 x 0.832 x 72.0 inch
SKU: 46673
Price: 700.00 USD
Availability: InStock

P/N: 46673

0.750" x 0.832" x 72" ◾ Space Grade LEO

P/N: 46673

$700.00

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Units:

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Quantity Needed

Quantity must be greater than 1.

Full Length

Custom Length

Length ([tolerance value] max)

Please select a valid length.

Precision of Measurement

±[tolerance value]

Please select a tolerance option.

No Sanding - Product comes in original finish
Standard Sanding - Matte, smooth finish that is paint/bond ready
- ~0.005 reduction on outer diameter (OD)."
- This removes the outer cello wrap gloss finish.
Custom Sanding - Need to meet a specific outer diameter
- Sand outer diameter to specified thickness.
- Patterns will likely distort in appearance
Final OD ([min] - [max])
Please select a value within the allowed range.
Sanding Tolerance Options:
- ±[tolerance value]
Please select a tolerance option.

If you are requesting bulk discounts, cutting, or standard sanding services only, we will send you a cart with your product selections. You may enter your shipping information and purchase directly at that time. Please note, the cart will not allow edits to the quote. Any changes will have to be completed by our team. If we do not have enough information to complete your quote we will reach out to you directly. If you are requesting additional services or custom sanding, a team member will reach out to you to finalize a quote.

If you request a custom length you will be charged for a full length item (or items if more than 1 is needed to meet your request) plus a cutting fee. You will then be shipped the item sized to your specification and any remaining length of the orginal item (drops). Sanding also incurs a fee which will be included in the quote. All items that have been sanded or cut may not be returned.

Additional Notes or Services Needed (Assembly, Bonding, Etc.) Timeline

Estimated lead time for quantities greater than what is Available Now is expected to be between 2 and 4 weeks.

0.750" x 0.832" x 72" ◾ Space Grade LEO

Rock West Composites is proud to introduce a line of tubes specifically crafted for the rigors of space. Constructed with HR40 carbon fiber (57 Msi) in a quasi-isotropic layup for low CTE and high stiffness. NB321 resin is used to ensure low outgassing and reliable performance for multiple years on station. Designed specifically for Low Earth Orbit (LEO), the maximum suggested use temperature is 300°F (150°C). Full traceability is maintained to material lots, cure cycle detail, and buy-up coupon testing.

Features & Benefits

Each space grade order includes a certificate package with dimensional inspection, material certificates, traceability, and a statement of verification. All tubes are serialized and traceable. Additional options include full traveler verification (copies of out time tracking, ply angle and cure verifications), resin content testing (up to two test per tube available), and short beam shear testing.

Product Specifications

Technical datasheets available at the bottom of the page

Mitsubishi HR40 high modulus fiber.

Newport 321 epoxy resin.

Additional Information

Units:

Application	Space & Stable Structures
Shape	Round
Materials	High Modulus Carbon
Pattern	Unidirectional
Color	Black
Finish	Cello Wrap Gloss
Inside Diameter	0.75
Outside Diameter	0.832
Wall Thickness	0.041
Length	72
Length (max continuous)	72.0
Linear Density	0.07
Volumetric Density	0.057
Weight	0.418
Primary Fiber	Tenax UTS50
Primary Resin / Hardener	Eporite EHM32
Resin / Chemistry / Polymer Type	Epoxy
Space Flight Ready	true

Engineering Properties

All laminate properties and mechanical calculations are based on Classical Lamination Theory and should be used as a reference only. Rock West Composites does not guarantee these properties or calculations.

Units:

Avg EX Young's Modulus	1.257E7
Avg EY Young's Modulus	1.257E7
GXY Shear Modulus	4909000.0
X Tensile Yield Strength	86450.0
X Compressive Yield Strength	73650.0
Y Tensile Yield Strength	82780.0
Y Compressive Yield Strength	80770.0
XY Shear Strength	41640.0
CTEX	8.19E-07
CTEY	8.19E-07
Poisson's Ratio vXY	0.28
Poisson's Ratio vYX	0.28

Note:

"X" is along the length of a tube, rod, plate, or panel.
"Y" is around the perimeter of a tube, perpendicular to the length of pultruded parts, or along the width of a plate or panel.

Calculators

Units:

Deflection & Failure of Round Cantilevers

Inputs

Notes:

A green highlight indicates a valid input.
A red box indicates an invalid input.
Part weight is taken into account for all calculations

Label	Value	Units
Point Load	Positive value for downwards force. Negative value for upwards force.	Pounds
Distributed Load (total)	Positive value for downwards force. Negative value for upwards force.	Pounds
Outer Diameter		Inches
Inner Diameter		Inches
Location of Point Load	Number between 0 and the value for Length This is a required field.	Inches
Length	Value up to	Inches

Outputs

Notes:

A green highlight indicates that a sample is unlikely to fail in this manner.
A red highlight indicates that a sample is likely to fail in this manner.

Label	Result	Units
Max Shear Stress		PSI
Max Bending Stress		PSI
Deflection at Point Load		Inches
Max Deflection Location		Inches
Max Deflection		Inches
Deflection at Free End		Inches
Part Weight		Pounds

Deflection & Failure of Simply Supported Round Beams

Inputs

Notes:

A green highlight indicates a valid input.
A red box indicates an invalid input.
Part weight is taken into account for all calculations

Label	Value	Units
Point Load	Positive value for downwards force. Negative value for upwards force.	Pounds
Distributed Load (total)	Positive value for downwards force. Negative value for upwards force.	Pounds
Outer Diameter		Inches
Inner Diameter		Inches
Location of Point Load	Number between 0 and the value for Length This is a required field.	Inches
Length	Value up to	Inches

Outputs

Notes:

A green highlight indicates that a sample is unlikely to fail in this manner.
A red highlight indicates that a sample is likely to fail in this manner.

Label	Result	Units
Max Shear Stress		PSI
Max Bending Stress		PSI
Deflection at Point Load		Inches
Max Deflection Location		Inches
Max Deflection		Inches
Part Weight		Pounds

Round Tubes and Rods - Axial Tension and Compression

Notes

Tension uses positive notation and compression uses negative notation.
End conditions are critical when considering buckling:
- Fixed = constrained in both translation and rotation.
- Pinned = constrained only in translation (ie. bolted joints).
- Free = not constrained (similar to a cantilevered end).
Long, skinny parts in compression are more succeptible to fail in buckling
Only parts in compression can fail in buckling

Inputs

Notes:

A green highlight indicates a valid input.
A red box indicates an invalid input.

Label	Value	Units
Load	Positive value indicates tension. Negative value indicates compression.	Pounds
Outer Diameter		Inches
Inner Diameter		Inches
Length	Value up to	Inches
End Conditions		N/A

Outputs

Notes:

A green highlight indicates that a sample is unlikely to fail in this manner.
A red highlight indicates that a sample is likely to fail in this manner.

Label	Result	Units
Max Axial Stress		PSI
1st Order Buckling Critical Load		Pounds
Change in Length		Inches (linear elastic only)
Part Weight		Pounds

Round Tubes and Rods - Critical Speed and Torque

Inputs

Notes:

A green highlight indicates a valid input.
A red box indicates an invalid input.

Label	Value	Units
Outer Diameter		Inches
Inner Diameter		Inches
Length	Value up to	Inches
Applied Torque		Foot-Pounds
Configuration		N/A

Outputs

Notes:

A green highlight indicates that a sample is unlikely to fail in this manner.
A red highlight indicates that a sample is likely to fail in this manner.

Label	Result	Units
Max Allowable Torque		Foot-Pounds
Twist Angle at Specified Torque		Degrees
Critical Speed _{(no factor of safety)}		RPM
Part Weight		Pounds

Layup Orientation

46673 Rev NC

Ply #	Orientation (degrees)	Location
1	0	Inside
2	60	↓
3	-60
4	-60
5	60
6	0
7	0
8	60
9	-60
10	-60
11	60
12	0	Outside

0° fibers maximize bending stiffness and run along the length of the part. Consider bending a tube over your knee.
45° fibers maximize torsional stiffness and are typically plied together in an opposing manner, i.e. ±45°. Consider twisting a tube like a vehicle's driveshaft.
90° (or "hoop") fibers maximize crushing stiffness and generally assist in overall durability. Consider laying a tube on the ground and stepping on it.

Technical Specifications

Technical drawing including layup and cure details is available upon request with NDA.

Calculated tube laminate mechanical properties
PROPERTY	VALUE	UNITS
Ft1u	121.5	ksi
Fc1u	-73.7	ksi
Ft2u	107.6	ksi
Fc2u	-108	ksi
F12	52.6	ksi
E1	12.57	Msi
E2	12.57	Msi
G12	4.91	Msi
v12	0.280
CTE1	0.819	ppm/°F
CTE2	0.819	ppm/°F

As-tested properties are coming soon.

Tolerances

ID: ± 0.003"

Wall: ± 10%

Length: ± 0.125"

Straightness: 0.006"/ft TIR