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Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030147
EISBN: 978-1-62708-349-2
...Abstract Abstract Achieving the best-performing composite part requires that the processing method and cure cycle create high-quality, low-void-content structures. If voids are present, the performance of the composite will be significantly reduced. There are multiple causes of voids...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030137
EISBN: 978-1-62708-349-2
...Abstract Abstract Analyzing the structure of composite materials is essential for understanding how the part will perform in service. Assessing fiber volume variations, void content, ply orientation variability, and foreign object inclusions helps in preventing degradation of composite...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2011
DOI: 10.31399/asm.tb.cfw.t52860095
EISBN: 978-1-62708-338-6
... 8.13 Yokota M.F. , SAMPE J. , Vol 14 ( No. 4 ), 1978 , p 11 8.14 Ghiorse S.R. , Effect of Void Content on the Mechanical Properties of Carbon/Epoxy Laminates , SAMPE Q. , Jan 1993 , p 54 – 59 8.15 Koppert J.J. and Beukers A.B. , Full Composite...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030223
EISBN: 978-1-62708-349-2
... film is often co-cured with the composite sandwich panel to improve the appearance of the part and to provide a smooth, uniform, and nonporous surface. Film Adhesive/Prepreg Resin Flow and Intermingling Honeycomb Core Movement and Core Crush Void Content in Honeycomb Composites Honeycomb...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2011
DOI: 10.31399/asm.tb.cfw.t52860081
EISBN: 978-1-62708-338-6
... content of composites has a very pronounced and deleterious effect upon interlaminar shear strength. Figure 7.6 demonstrates the winding of a void-free pressure bottle. Note that this can be a very messy procedure. First, the resin content of the structure is governed by and is very reproducible through...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.t51140047
EISBN: 978-1-62708-335-5
..., dissolved hydrogen in excess of the extremely low solid solubility may precipitate in molecular form, resulting in the formation of primary and/or secondary voids. Primary or interdendritic porosity forms when hydrogen contents are sufficiently high that hydrogen is rejected at the solidification front...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870119
EISBN: 978-1-62708-314-0
... process Lower labor intensity and skill levels Considerable design flexibility: reinforcements, lay-up sequence, core materials, and mixed materials Mechanical properties comparable to autoclave part (void content <1%) Part size range and complexity make RTM appealling Smooth finish...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2011
DOI: 10.31399/asm.tb.cfw.9781627083386
EISBN: 978-1-62708-338-6
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030001
EISBN: 978-1-62708-349-2
... decades to provide insight into the micro- and macrostructure of fiber-reinforced composites. The most widespread use of optical microscopy for composites is determining void content, ply counts, and fiber orientations. While this makes up the majority of analysis, the investigation of failure mechanisms...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.9781627083492
EISBN: 978-1-62708-349-2
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870201
EISBN: 978-1-62708-314-0
.... The resin contents and thickness values of the overbled laminate were significantly lower than those of standard bled laminate. Since the resin pressure actually dropped to below zero psi due to the vacuum pulled underneath the bag, little resistance to void growth existed. As expected, the ultrasonic NDT...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870489
EISBN: 978-1-62708-314-0
... of 0.6 in. from the intersection of the inner skin and edge band up the ramp and a minimum of 0.2 in. from that point into the edge band. Curing pressures tend to cause the inner skin to “bridge” in this area creating a void in the adhesive (skin to core bond). 10. The use of honeycomb sandwich...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550385
EISBN: 978-1-62708-307-2
... • Repecka L. and Boyd J. , “ Vacuum-Bag-Only-Curable Prepregs That Produce Void-Free Parts ,” SAMPE 2002 , May 12–16 , 2002 • Thorfinnson B. and Bierrinann T.F. , “ Production of Void Free Composite Parts without Debulking ,” 31st International SAMPE Symposium...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030193
EISBN: 978-1-62708-349-2
... process can also affect the consolidation and void content in the cured part, altering the crack propagation and failure mechanism upon impact of the composite. Analysis Methods for Impact-Damaged Composites Brittle-Matrix Composite Failure Tough-Matrix Composite Failure Thermoplastic-Matrix...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610209
EISBN: 978-1-62708-303-4
... K Ic by temper embrittlement Sulfide inclusions and coarse carbides Decrease K Ic by promoting crack or void nucleation High carbon content (>0.25%) Decrease K Ic by easily nucleating cleavage Twinned martensite Decrease K Ic due to brittleness Martensite content...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870351
EISBN: 978-1-62708-314-0
... °C) and 95 percent RH was used to accelerate the initial moisture intake. The humidity was then reduced to 70 percent RH to obtain the desired moisture content within 90 days. Note that the specimen exposed to a constant 70 percent RH and 160 °F (70 °C) did not absorb the desired moisture content...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030148
EISBN: 978-1-62708-282-2
...) gas pressure 0.1 to 10 ppm total hydrogen content 0.1 to 10 ppm total hydrogen content range of gas pressure exposure Up to 10 2 MPa (15 ksi) at 200–595 °C (400–1100 °F) Hydrogen activity equivalent to 0.2 to 1 × 10 2 MPa (3–15 ksi) at 0–150 °C (30–300 °F) Precipitation of dissolved ingot...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870373
EISBN: 978-1-62708-314-0
... Typical properties of glass chopped strand mat (CSM) composites Property Spray roving Chopped strand mat Chopped strand mat Chopped strand mat Chopped strand mat/woven roving Glass content, wt% 30–35 25–30 30–35 35–40 45–50 Glass content, vol% 16–20 14–16 16–20 20–24 28–32...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120047
EISBN: 978-1-62708-269-3
.... Purity is important for all powder products and is critical for the consolidation of blended elemental fines where the void content must be minimal—the residual chloride content is a major factor in the amount of residual porosity of the final product. Contaminants are detrimental to fatigue performance...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410017
EISBN: 978-1-62708-265-5
... is approached in a given phase field, or of those that result from phase transformations, provides the scientific basis for the heat treatment of steels. Figure 3.1 shows the Fe-C equilibrium diagram for carbon contents up to 7%. As noted in Chapter 1, “Introduction: Purpose of Text, Microstructure...