Design Guide - Solvay Plastics

Figure 53: Effect of Moisture on Tensile Strength
of GR Resins. ...................... 40
Figure 54: Effect of Moisture on Flex Modulus
of GR Resins . ...................... 40
Figure 55: Dimensional Change of 33% GR PPA .... 40
Figure 56: Dimensional Change of 40% Mineral
Filled PPA. ......................... 41
Figure 57: Dimensional Comparison of GR PA 6,6
to GR PPA at 100% RH. .............. 41
Figure 58: Mold Temperature and Annealing Effects
on HDT of Amodel AS-1133 HS. ........ 42
Figure 59: HDT of 30% - 33% GR Resins. ......... 43
Figure 60: Thermal Conductivity of Glass Reinforced
Amodel ® PPA....................... 45
Figure 61: Amodel A-1000 PPA, Specific Heat
vs. Temperature. .................... 46
Figure 62: Amodel A-4000, Specific Heat
vs. Temperature. .................... 46
Figure 63: Amodel A-5000, Specific Heat
vs. Temperature. .................... 46
Figure 64: Amodel A-6000, Specific Heat
vs. Temperature. .................... 46
Figure 65: Thermogravimetric Analysis
of A-1000 in Air. .................... 47
Figure 66: Thermal Aging Comparison -
Tensile Strength. .................... 47
Figure 67: Thermal Aging Comparison -
Izod Impact. ....................... 48
Figure 68: Adding Ribs to Increase Stiffness. ....... 69
Figure 69: Cantilever Beam, Bending
Load Example. ..................... 69
Figure 70: Tensile Creep Rupture,
Amodel A-1133 HS Resin ............. 70
Figure 71: Stress Concentration Factor
at Inside Corners. ................... 71
Figure 72: Thermal Stress Example. .............. 71
Figure 73: Bolt Torque Retention. ................ 72
Figure 74: Designing for Mechanical Fasteners. ..... 74
Figure 75: Boss Design for Self-Tapping Screws .... 74
Figure 76: Torque Developed During
Screw Installation ................... 75
Figure 77: Boss Design for Ultrasonic Inserts. ...... 75
Figure 78: Cantilever Type Snap Fit. .............. 76
Figure 79: Boss Design for Self-Tapping Screws .... 76
Figure 80: Snap Fit Design Using Tapered Beam .... 77
Figure 81: Proportionality Constant (K) for
Tapered Beam. ..................... 77
Figure 82: Wall Thickness Transition. ............. 78
Figure 83: Draft - Designing for Mold Release. ...... 78
Figure 84: Draft - Recommended Rib Design. ...... 79
Figure 85: Boss Design - General Guidelines ....... 80
Figure 86: Thermostat Housing Showing Beads. .... 80
Figure 87: Undercut Diagram. .................. 80
Figure 88: Joint Design for Hot Plate Welding. ...... 81
Figure 89: Lap Shear Joint Configuration .......... 82
Figure 90: Shear Joint Configuration. ............. 82
Figure 91: Typical Energy-Directing
Joint Configuration. .................. 83
Figure 92: Lap Shear Bond Strength. ............. 84
Figure 93: Side Impact Bond Strength. ........... 84
Table of Contents
Amodel ® PPA Design Guide
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