The low density and friable structural matrix of fiberboards cause crushing at the grip zone and premature core shear failures.
Deploy broad-surface mechanical platens for transverse bending and specialized glued-block assemblies for parallel tensile pulling.
When performing the perpendicular tensile test, use a high-strength epoxy to bond the metal blocks uniformly across the fiber face.
When performing the perpendicular tensile test, use a high-strength epoxy to bond the metal blocks uniformly across the fiber face.
Uniform epoxy adhesion across the face prevents stress concentration spikes, ensuring failure occurs cleanly within the core board matrix.
Store the cellulose boards in a strictly regulated humidity chamber prior to testing to prevent moisture-induced strength loss.
Applying localized clamping pressure directly to unbacked fiberboard surfaces, which structurally crushes the specimen.
Typical testing system controllers rely on 24-bit resolution. Under high-accuracy flexural analysis, this creates a data phenomenon called **”stair-stepping”** or quantization error. When trying to track minor micro-deflection in rigid polymers, 24-bit electronic circuits suffer from resolution limits, dropping critical transition points during initial load curves.
Newton Characterization™ architecture utilizes a 32-bit analog-to-digital processor converter. This increases measurement fidelity by a factor of 256x, outputting 4.29 billion discrete signal thresholds. Electrical chatter is actively muted under a dedicated 100,000:1 Signal-to-Noise Ratio (SNR).
Comparing standard 24-bit quantization with Newton™ 32-bit resolution
Observe the stepped resolution blocks in the legacy 24-bit curve (Red) versus the absolute **analog-smooth response curve** captured by Newton™ 32-bit architectures (Green). This fidelity is what prevents mechanical data variance during modulus evaluation.
Expert Engineering Commentary
Core Problem Identification
Crushing or tearing of the soft fiber matrix near the clamp face before achieving true structural bulk failure.
Root Cause Analysis
Excessive localized clamping pressures from standard wedge or pneumatic grips acting on low-density cellulose fibers.
Hardware Specific Solutions
Dual-surface flat platens for flexure and broad-area glued metal bonding blocks for perpendicular tensile pulls.