Free Download Engineering Ebooks - Pdf - Ppt - Lecture Notes

Free Download Engineering Ebooks

Free Download Magazines

Oil, Gas & Petrochemical    Cogeneration & On-Site Power    Power Engineering Int   Pumps & Systems   LEDs Magazine    Offshore Magazine   POWERGRID International    LEDs Magazine   



   
Lijit Search
Get the latest updates
via email.

Composite Materials Handbook Vol 1. Polymer Matrix Composites Guidelines for Characterization of Structural Materials

  



Composite Materials Handbook Vol 1. Polymer Matrix Composites Guidelines for Characterization of Structural Materials

 

 

File : pdf, 4.4 MB, 586 pages

TOC

CHAPTER 1 OBJECTIVES
1.1 INTRODUCTION
1.2 PURPOSE
1.3 SCOPE
1.3.1 Strength properties and allowables data
1.3.2 Volume 1: Guidelines for Characterization of Structural Materials
1.3.3 Volume 2: Material Properties
1.3.4 Volume 3: Materials Usage, Design, and Analysis Guidelines
1.4 USE OF THE DOCUMENT AND LIMITATIONS
1.4.1 Roadmaps for use of Volumes 1 – 3
1.4.2 Source of information
1.4.3 Use of data and guidelines in applications
1.4.4 Strength properties and allowables terminology
1.4.5 Use of references
1.4.6 Use of tradenames and product names
1.4.7 Toxicity, health hazards, and safety
1.4.8 Ozone depleting chemicals
1.5 APPROVAL PROCEDURES
1.6 SYMBOLS, ABBREVIATIONS, AND SYSTEMS OF UNITS 18
1.6.1 Symbols and abbreviations
1.6.2 System of units
1.7 DEFINITIONS

CHAPTER 2 GUIDELINES FOR PROPERTY TESTING OF COMPOSITES
2.1 INTRODUCTION
2.1.1 Building-block approach to substantiation of composite structures
2.1.2 Test levels and data uses
2.2 TEST PROGRAM PLANNING
2.2.1 Overview
2.2.2 Baseline and alternate approaches for statistically-based properties
2.2.3 Issues of data equivalence
2.2.4 Test method selection
2.2.5 Population sampling and sizing
2.2.5.1 Sample size selection
2.2.5.2 Batch quantity effects on ANOVA
2.2.6 Material and processing variation, specimen preparation and NDE
2.2.6.1 Materials and material processing
2.2.6.2 Specimen preparation and NDE
2.2.7 Moisture absorption and conditioning factors.
2.2.7.1 Moisture diffusivity
2.2.7.2 Moisture equilibrium content
2.2.7.3 Conditioning and test environment
2.2.8 Material operational limit (MOL)
2.2.8.1 Steam pressure delamination
2.2.8.2 MOL considerations for high temperature composite systems
2.2.8.3 Hot Wet Testing – Report Moisture Content at Failure
2.2.9 Nonambient testing
2.2.10 Unidirectional lamina properties from laminates
2.2.11 Data normalization
2.2.12 Data documentation
2.2.13 Application specific testing needs
2.3 RECOMMENDED TEST MATRICES
2.3.1 Material screening test matrices
2.3.1.1 Mechanical property screening
2.3.1.2 Mechanical property screening for high-temperature material systems
2.3.1.3 Fluid sensitivity screening
2.3.2 Material qualification test matrices
2.3.3 Material acceptance test matrices
2.3.4 Alternate material equivalence test matrices
2.3.4.1 Qualification of alternate source composite materials
2.3.4.2 Evaluation of changes made to previously qualified materials
2.3.5 Generic laminate/structural element test matrices
2.3.5.1 Introduction
2.3.5.2 Overview
2.3.5.2.1 Laminate strength test matrix
2.3.5.2.2 Bolt bearing and bearing/bypass strength test matrix
2.3.6 Alternate approaches to basis values
2.4 DATA REDUCTION AND DOCUMENTATION
2.4.1 Introduction
2.4.2 Lamina properties from laminates
2.4.3 Data normalization
2.4.4 Dispositioning of Outlier Data
2.4.5 Data documentation
2.5 MATERIAL TESTING FOR SUBMISSION OF DATA TO MIL-HDBK-17
2.5.1 Introduction
2.5.2 Material and process specification requirements
2.5.3 Sampling requirements
2.5.3.1 Additional requirements for B and A data classes
2.5.3.2 Data pooling
2.5.4 Conditioning requirements
2.5.5 Test method requirements
2.5.6 Data documentation requirements
2.5.7 Data normalization
2.5.8 Statistical analysis
2.5.9 Mechanical properties of laminae and laminates
2.5.9.1 Unidirectional properties from laminates
2.5.9.2 Strength and strain-to-failure
2.5.9.3 Elastic moduli, Poisson’s ratios, and stress/strain curves
2.5.10 Chemical properties
2.5.11 Physical properties of laminae and laminates
2.5.11.1 Density
2.5.11.2 Composition
2.5.11.3 Equilibrium moisture content
2.5.11.4 Moisture diffusivity
2.5.11.5 Coefficient of moisture expansion
2.5.11.6 Glass transition temperature
2.5.12 Thermal properties
2.5.13 Electrical properties
2.5.14 Fatigue

CHAPTER 3 EVALUATION OF REINFORCEMENT FIBERS
3.1 INTRODUCTION
3.2 CHEMICAL TECHNIQUES
3.2.1 Elemental analysis
3.2.2 Titration
3.2.3 Fiber structure
3.2.4 Fiber surface chemistry
3.2.5 Sizing content and composition
3.2.6 Moisture content
3.2.7 Thermal stability and oxidative resistance
3.2.8 Chemical resistance
3.3 PHYSICAL TECHNIQUES (INTRINSIC)
3.3.1 Filament diameter
3.3.2 Density of fibers
3.3.3 Electrical resistivity
3.3.4 Coefficient of thermal expansion
3.3.5 Thermal conductivity
3.3.6 Specific heat
3.3.7 Thermal transition temperatures
3.4 PHYSICAL TECHNIQUES (EXTRINSIC)
3.4.1 Yield of yarn, strand, or roving
3.4.2 Cross-sectional area of yarn or tow
3.4.3 Twist of yarn
3.4.4 Fabric construction
3.4.5 Fabric areal density
3.5 MECHANICAL TESTING OF FIBERS
3.5.1 Tensile properties
3.5.1.1 Filament tensile testing
3.5.1.2 Tow tensile testing
3.5.1.3 Fiber properties from unidirectional laminate tests
3.5.2 Filament compression testing
3.6 TEST METHODS
3.6.1 Determination of pH
3.6.2 Determination of amount of sizing on carbon fibers
3.6.3 Determination of moisture content or moisture regain
3.6.4 Determination of fiber diameter
3.6.5 Determination of electrical resistivity

CHAPTER 4 MATRIX CHARACTERIZATION
4.1 INTRODUCTION
4.2 MATRIX SPECIMEN PREPARATION
4.2.1 Introduction
4.2.2 Thermoset polymers
4.2.3 Thermoplastic polymers
4.2.4 Specimen machining
4.3 CONDITIONING AND ENVIRONMENTAL EXPOSURE
4.4 CHEMICAL ANALYSIS TECHNIQUES
4.4.1 Elemental analysis
4.4.2 Functional group and wet chemical analysis
4.4.3 Spectroscopic analysis
4.4.4 Chromatographic analysis
4.4.5 Molecular weight and molecular weight distribution analysis
4.4.6 General scheme for resin material characterization
4.5 THERMAL/PHYSICAL ANALYSIS AND PROPERTY TESTS
4.5.1 Introduction
4.5.2 Thermal analysis
4.5.3 Rheological analysis
4.5.4 Morphology
4.5.5 Density/specific gravity
4.5.6 Volatiles content
4.5.7 Moisture content
4.6 STATIC MECHANICAL PROPERTY TESTS
4.7 FATIGUE TESTING
4.8 TESTING OF VISCOELASTIC PROPERTIES

CHAPTER 5 PREPREG MATERIALS CHARACTERIZATION
5.1 INTRODUCTION
5.2 CHARACTERIZATION TECHNIQUES – OVERVIEW
5.3 SAMPLING
5.4 PHYSICAL CHARACTERISTICS AND PROPERTY TESTS
5.4.1 Physical description of reinforcement
5.4.2 Resin content
5.4.3 Fiber content
5.4.4 Volatiles content
5.4.5 Moisture content
5.4.6 Inorganic fillers and additives content
5.4.7 Areal weight
5.4.8 Tack and drape
5.4.9 Resin flow
5.4.10 Gel time
5.5 TEST METHODS
5.5.1 Resin extraction procedure for epoxy resin prepregs
5.5.2 Procedure for HPLC/HPSEC analysis of glass, aramid, and graphite fiber prepregs
5.5.2.1 Reverse phase HPLC analysis
5.5.2.2 Size Exclusion Chromatography (SEC) analysis
5.5.3 Procedure for Fourier transform infrared spectroscopy (FTIR)
5.5.4 Procedure for differential scanning calorimetry (DSC)
5.5.5 Procedure for dynamic mechanical analysis (DMA)
5.5.6 Procedure for rheological characterization

CHAPTER 6 LAMINA, LAMINATE, AND SPECIAL FORM CHARACTERIZATION
6.1 INTRODUCTION
6.2 SPECIMEN PREPARATION
6.3 CONDITIONING AND ENVIRONMENTAL EXPOSURE
6.4 INSTRUMENTATION AND CALIBRATION
6.4.1 Introduction
6.4.2 Test specimen dimensional measurement
6.4.3 Load measurement devices
6.4.4 Strain/displacement measurement devices
6.4.4.1 Introduction
6.4.4.2 LVDT (Linear Variable Differential Transformer) deflectometers
6.4.4.3 Contacting extensometers
6.4.4.4 Bondable resistance strain gages
6.4.4.4.1 Strain gage selection
6.4.4.4.2 Surface preparation and bonding of strain gages
6.4.4.4.3 Strain gage circuits
6.4.4.4.4 Strain gage instrumentation
6.4.4.4.5 Strain gage instrumentation calibration
6.4.4.5 Other methods
6.4.4.6 Special considerations for textile composites
6.4.5 Temperature measurement devices
6.4.6 Data acquisition systems
6.5 TESTING ENVIRONMENTS
6.5.1 Introduction
6.6 THERMAL/PHYSICAL PROPERTY TESTS
6.6.1 Introduction
6.6.2 Extent of cure
6.6.3 Glass transition temperature
6.6.3.1 Overview
6.6.3.2 Tg Measurements
6.6.3.2.1 Differential scanning calorimetry (DSC)
6.6.3.2.2 Thermomechanical analysis (TMA)
6.6.3.2.3 Dynamic mechanical analysis (DMA)
6.6.3.3 Glass transition test methods for MIL-HDBK-17 data submittal
6.6.3.4 Crystalline melt temperature
6.6.4 Density
6.6.5 Cured ply thickness
6.6.6 Fiber volume (Vf) fraction
6.6.6.1 Introduction
6.6.6.2 Matrix digestion
6.6.6.3 Ignition loss
6.6.6.4 Areal weight/thickness
6.6.6.5 Determination of fiber volume using image analysis
6.6.7 Void volume (Vv) fraction
6.6.7.1 Introduction
6.6.7.2 Digestive evaluation
6.6.7.3 Determination of void volume using image analysis
6.6.8 Moisture/diffusivity
6.6.9 Dimensional stability (Thermal and Moisture)
6.6.9.1 Dimensional stability (thermal)
6.6.9.2 Dimensional stability (moisture)
6.6.10 Thermal conductivity
6.6.10.1 Introduction
6.6.10.2 Available methods
6.6.10.2.1 ASTM C177-97
6.6.10.2.2 ASTM E1225-99
6.6.10.2.3 ASTM C518-98
6.6.10.2.4 Fourier thermal conductivity test method for flat plates
6.6.10.3 Thermal conductivity test methods for MIL-HDBK-17 data
6.6.11 Specific heat
6.6.11.1 Introduction
6.6.11.2 Available method
6.6.11.2.1 ASTM E1269-95
6.6.12 Thermal diffusivity
6.6.12.1 Introduction
6.6.12.2 Available test methods
6.6.12.2.1 ASTM E1461-92
6.6.12.2.2 ASTM C714-85
6.6.13 Outgassing
6.6.14 Absorptivity and emissivity
6.6.15 Thermal cycling
6.6.16 Microcracking
6.6.16.1 Introduction
6.6.16.2 Microcracking due to the manufacturing process
6.6.16.3 Microcracking due thermal cycling
6.6.16.4 Microcracking due to mechanical loading/cycling
6.6.17 Thermal oxidative stability (TOS)
6.6.18 Flammability and smoke generation
6.6.18.1 Introduction
6.6.18.2 Fire growth test methods
6.6.18.2.1 ASTM E 84 – Surface burning characteristics of building materials
6.6.18.2.2 ASTM E 162 – Surface flammability of materials using a radiant heat energy source
6.6.18.2.3 ISO 9705 fire test – full-scale room test for surface products
6.6.18.2.4 ASTM E 1321 – Determining material ignition and flame spread properties
6.6.18.3 Smoke and toxicity test methods
6.6.18.3.1 ASTM E 662 – Specific optical density of smoke generated by solid materials
6.6.18.3.2 NFPA 269 – Developing toxic potency data for use in fire hazard modeling
6.6.18.4 Heat release test methods
6.6.18.4.1 ASTM E-1354 – Heat and visible smoke release rates for materials and products using an oxygen consumption calorimeter
6.6.18.4.2 ASTM E 906 – Heat and visible smoke release rates for materials and products
6.6.18.5 Fire resistance test methods
6.6.18.5.1 ASTM E-119 – Fire tests for building construction and materials
6.6.18.5.2 ASTM E-1529 – Determining effects of large hydrocarbon pool fires on structural members and assemblies and UL 1709 – Rapid rise fire tests of

protection materials for structural steel
6.7 ELECTRICAL PROPERTY TESTS
6.7.1 Introduction
6.7.2 Electrical permittivity
6.7.3 Dielectric strength
6.7.4 Magnetic permeability
6.7.5 Electromagnetic interference
6.7.6 Electrostatic discharage
6.8 STATIC UNIAXIAL MECHANICAL PROPERTY TESTS
6.8.1 Introduction
6.8.2 Tensile properties
6.8.2.1 Overview
6.8.2.2 In-plane tension test methods
6.8.2.2.1 Straight-sided specimen tension tests
6.8.2.2.2 Filament-wound tubes
6.8.2.2.3 Width tapered specimens:
6.8.2.2.4 Split-disk ring tension test
6.8.2.2.5 Sandwich beam test
6.8.2.3 Out-of-plane tensile test methods
6.8.2.3.1 Introduction
6.8.2.3.2 Direct out-of-plane loading adaptations of ASTM C 297/C 633/D 2095
6.8.2.3.3 Curved beam approach to out-of-plane tensile strength
6.8.3 Compressive properties
6.8.3.1 Overview
6.8.3.2 In-plane compression tests
6.8.3.2.1 ASTM D 3410/D 3410M, Compressive Properties of Polymer Matrix Composite Materials With Unsupported Gage Section by Shear Loading
6.8.3.2.2 ASTM D 6484, Compressive Properties of Polymer Matrix Composite Laminates Using a Combined Loading Compression (CLC) Test Fixture
6.8.3.2.3 ASTM D 5467, Compressive Properties of Unidirectional Polymer Matrix Composites Using a Sandwich Beam
6.8.3.2.4 ASTM C 393, Flexural Properties of Flat Sandwich Constructions
6.8.3.2.5 ASTM D 695, Compressive Properties of Rigid Plastics
6.8.3.2.6 SACMA SRM 1R, Compressive Properties of Oriented Fiber-Resin Composites
6.8.3.2.7 SACMA SRM 6, Compressive Properties of Oriented Cross-Plied Fiber-Resin Composites
6.8.3.2.8 Through-thickness compression tests
6.8.4 Shear properties
6.8.4.1 Overview
6.8.4.2 In-plane shear tests
6.8.4.3 Out-of-plane shear tests
6.8.4.3.1 Short-beam strength tests
6.8.4.3.2 Iosipescu shear test
6.8.4.3.3 ASTM D 3846-79, Test Method for In-Plane Shear Strength of Reinforced Plastics
6.8.4.4 Shear test methods for MIL-HDBK-17 data submittal
6.8.5 Flexural properties
6.8.6 Fracture toughness properties
6.8.6.1 Overview
6.8.6.2 General discussion
6.8.6.3 Mode I test methods
6.8.6.3.1 Double cantilever beam (DCB) test, ASTM D 5528
6.8.6.3.2 Other mode I tests
6.8.6.4 Mode II test methods
6.8.6.4.1 End notched flexure (ENF) test
6.8.6.4.2 Other mode II tests
6.8.6.5 Mode III test methods
6.8.6.6 Mixed mode test methods
6.8.6.6.1 Mixed mode specimen or crack lap shear (CLS)
6.8.6.6.2 Mixed mode bending (MMB) test
6.8.6.6.3 Edge delamination test
6.9 UNIAXIAL FATIGUE TESTING
6.10 MULTIAXIAL MECHANICAL PROPERTY TESTING
6.11 VISCOELASTIC PROPERTIES TESTS
6.11.1 Introduction
6.11.2 Creep and stress relaxation
6.12 FORM-SPECIFIC MECHANICAL PROPERTY TESTS
6.12.1 Tests unique to filament winding
6.12.1.1 Overview
6.12.1.2 History
6.12.1.3 Tension tests for uniaxial material properties
6.12.1.4 Compression tests for uniaxial material properties
6.12.1.5 Shear tests for uniaxial material properties
6.12.1.6 Test methods for MIL-HDBK-17 data submittal
6.12.2 Tests unique to textiles composites
6.12.3 Tests unique to thick-section composites
6.13 SPACE ENVIRONMENTAL EFFECTS ON MATERIAL PROPERTIES
6.13.1 Introduction
6.13.2 Atomic oxygen
6.13.3 Micrometeoroid Debris
6.13.4 Ultraviolet radiation
6.13.5 Charged particles

CHAPTER 7 STRUCTURAL ELEMENT CHARACTERIZATION
7.1 INTRODUCTION
7.2 SPECIMEN PREPARATION
7.2.1 Introduction
7.2.2 Mechanically fastened joint tests
7.2.3 Bonded joint tests
7.3 CONDITIONING AND ENVIRONMENTAL EXPOSURE
7.3.1 Introduction
7.3.2 General specimen preparation
7.3.2.1 Strain
7.3.2.2 Notched laminates and mechanically fastened joint specimens
7.3.3 Bonded joints
7.3.4 Damage characterization specimens
7.3.5 Sandwich Structure
7.4 NOTCHED LAMINATE TESTS
7.4.1 Overview and general considerations
7.4.2 Notched laminate tension
7.4.2.1 Open-hole tensile test methods
7.4.2.2 Filled-hole tensile test methods
7.4.3 Notched laminate compression
7.4.3.1 Open-hole compressive test methods
7.4.3.2 Filled-hole compressive test methods
7.4.4 Suggested notched laminate test matrix
7.4.5 Notched laminate test methods for MIL-HDBK-17 data submittal
7.5 MECHANICALLY-FASTENED JOINT TESTS
7.5.1 Overview
7.5.2 Bearing Tests
7.5.2.1 Overview
7.5.2.2 Double shear bearing tests
7.5.2.2.1 ASTM D 953 bearing strength of plastics
7.5.2.2.2 ASTM D 5961, Procedure A
7.5.2.3 Single shear bearing tests
7.5.2.3.1 Overview
7.5.2.3.2 ASTM D 5961, Procedure B
7.5.2.4 Suggested joint bearing test matrices
7.5.2.5 Effects of thickness/gaps/shimming
7.5.2.6 Failure modes
7.5.3 Bearing/by-pass evaluation
7.5.3.1 Overview and rationale
7.5.3.2 Specimen design and testing
7.5.3.3 Suggested bearing/bypass test matrix
7.5.3.4 Data reduction
7.5.4 Shear-out strength
7.5.5 Fastener pull-thru strength (MIL-HDBK-17 test method)
7.5.6 Fastener-in-composite qualification tests
7.5.6.1 Overview
7.5.6.2 Fastener shear tests
7.5.6.3 Fastener tension tests
7.5.6.4 Fastener Pull-thru tests
7.5.6.5 Bearing tests
7.5.6.6 Data presentation
7.5.7 Bearing/mechanical joint test methods for MIL-HDBK-17 data submittal
7.6 BONDED JOINT TESTS
7.6.1 Overview
7.6.2 Adhesive characterization tests
7.6.2.1 Shear tests
7.6.2.1.1 ASTM D 5656 (thick adherend specimen)
7.6.2.1.2 ASTM E 229 (tubular specimen)
7.6.2.1.3 ASTM D 1002 (thin single lap spec. – QA test only)
7.6.2.2 Tension tests
7.6.2.2.1 ASTM D 2095
7.6.2.3 Fracture mechanics properties
7.6.2.4 Suggested adhesive characterization test matrix
7.6.3 Bonded joint characterization tests
7.6.3.1 Honeycomb to face sheet flatwise tension test (ASTM C 297)
7.6.3.2 Skin to stiffener bond tests
7.6.3.3 Double overlap joint tests
7.6.3.4 Single overlap joint tests
7.6.3.4.1 ASTM D 3165
7.6.3.4.2 European Aircraft Industry Standard EN 6066
7.6.3.4.3 Other examples
7.7 DAMAGE CHARACTERIZATION
7.7.1 Overview
7.7.2 Damage resistance
7.7.2.1 Falling weight impact
7.7.2.2 Izod and charpy impact
7.7.2.3 Quasi-static indentation
7.7.2.4 Other damage resistance tolerance tests
7.7.3 Damage tolerance tests
7.7.3.1 Compression after impact tests
7.7.3.1.1 Overview
7.7.3.1.2 SACMA SRM 2R-94 “Compression after Impact Properties of Oriented Fiber-Resin Composites”
7.7.3.1.3 NASA 1142, B.11 “Compression After Impact Test”
7.7.3.1.4 Test methods for MIL-HDBK-17 data submittal

CHAPTER 8 STATISTICAL METHODS
8.1 INTRODUCTION
8.2 BACKGROUND
8.2.1 Statistically-based design values
8.2.2 Basis values for unstructured data.
8.2.3 Basis values in the presence of batch-to-batch variability
8.2.4 Batches, panels, and confounding
8.2.5 Sample size guidelines for determining basis values
8.2.5.1 Example
8.2.5.2 Mean and standard deviations of normal basis values
8.2.5.3 Basis values using the ANOVA method
8.3 CALCULATION OF STATISTICALLY-BASED MATERIAL PROPERTIES
8.3.1 Guide to computational procedures
8.3.2 Subpopulation compatibility – structured or unstructured
8.3.3 Detecting outliers
8.3.3.1 The maximum normed residual
8.3.4 Basis values for unstructured data
8.3.5 Basis values for structured data
8.3.5.1 Regression analysis of linear statistical models
8.3.5.2 Analysis of variance
8.3.5.2.1 Levene’s test for equality of variances
8.3.5.2.2 The F-test for equality of means
8.3.5.2.3 One-way ANOVA computations based on individual measurements
8.3.5.2.4 One-way ANOVA computations based on summary statistics
8.3.5.2.5 The ANOVA table for a one-way model
8.3.5.2.6 Calculation of summary statistics for one-way ANOVA basis values
8.3.5.2.7 Calculations for three or more batches
8.3.5.2.8 Calculations for two batches
8.3.5.3 Simple linear regression 3
8.3.5.4 Basis values using pooling of structured data
8.3.6 Exploratory data analysis
8.3.7 Examples of computational procedures
8.4 STATISTICAL METHODS
8.4.1 Tests for determining equivalency between an existing database and a new dataset for the same material
8.4.2 Alternate material statistical procedures
8.4.3 Confidence intervals for the coefficient of variation
8.4.4 Statistical procedures for process control
8.4.5 Average stress-strain curves and bearing load-deformation curves
8.5 STATISTICAL TABLES AND APPROXIMATIONS
8.5.1 Quantiles of the F-distribution
8.5.2 Quantiles of the 2  distribution
8.5.3 Upper-tail quantiles for the t-distribution
8.5.4 Two-tail probabilities for the t-distribution
8.5.5 Upper-tail probabilities for the standard normal distribution
8.5.6 Critical values for the k-sample Anderson-Darling test at the alpha = 0.05 significance level
8.5.7 Critical values for the MNR outlier test
8.5.8 One-sided B-basis tolerance factors, VB, for the Weibull distribution
8.5.9 One-sided A-basis tolerance factors, VA, for the Weibull distribution
8.5.10 One-sided B-basis tolerance factors, kB, for the normal distribution
8.5.11 One-sided A-basis tolerance factors, kA, for the normal distribution
8.5.12 Ranks, rB, for determining nonparametric B-basis values
8.5.13 Ranks, rA, for determining nonparametric A-basis values
8.5.14 Nonparametric B-basis values for small sample sizes
8.5.15 Non-parametric A-basis values for small sample sizes
8.5.16 Critical values for approximate confidence limits on the coefficient of variation
8.5.17 One-sided tolerance factors for acceptance limits on mean values, for normal distribution
8.5.18 One-sided tolerance factors for acceptance limits on individual values, for normal distribution
8.5.19 Upper and lower tail quantiles for two-sided t-distribution

Download          :            pdf1



 Get News Update from This Site!  
Free Engineering Books Download
 

4 Responses to “Composite Materials Handbook Vol 1. Polymer Matrix Composites Guidelines for Characterization of Structural Materials”

  1. bouhafs says:

    i want this book for my work

  2. suresh kumar g says:

    very good knowledgable book

  3. subhadip says:

    am want this book for study…can i get that?please help

  4. L.He says:

    I need this work for my current work

Leave a Reply