PREDIKSI UMUR FATIK MATERIAL DAN STRUKTUR AKIBAT PEMBEBANAN DINAMIS

H. Agus Suhartono

doi:10.55981/brin.3917

PREDIKSI UMUR FATIK MATERIAL DAN STRUKTUR AKIBAT PEMBEBANAN DINAMIS

Authors

H. Agus Suhartono

Research Center for Structural Strength Technology, National Research and Innovation Agency (BRIN), Indonesia.

DOI: https://doi.org/10.55981/brin.3917

Keywords:

fatik, evolusi kerusakan, prediksi umur, mekanika retakan, CTOD, pembelajaran mesin, integritas struktur

Synopsis

Kegagalan fatik merupakan proses evolusi kerusakan yang berkembang secara bertahap, mulai dari deformasi plastis lokal, inisiasi retak mikro, pertumbuhan retak pendek, hingga perambatan retak panjang menuju kegagalan struktur. Prediksi umur fatik tidak cukup didasarkan pada kekuatan statis material, tetapi memerlukan pemahaman terhadap pengaruh mikrostruktur, tegangan sisa, kondisi manufaktur, dan riwayat pembebanan. Orasi ilmiah ini menyajikan sintesis hasil penelitian mengenai pengembangan kerangka terpadu prediksi umur material dan struktur berbasis evolusi kerusakan. Pendekatan yang dikembangkan mengintegrasikan karakterisasi mikrostruktur, pengujian fatik uniaksial dan multiaksial, mekanika retakan, pengujian Crack Tip Opening Displacement (CTOD), simulasi numerik, pembelajaran mesin (AI/ML), serta validasi skala penuh dalam kerangka Structural Integrity Engineering. Integrasi tersebut menghubungkan mekanisme kerusakan dari skala mikro hingga respons struktur pada kondisi operasi nyata, sekaligus mendukung evaluasi umur sisa dan toleransi cacat. Kontribusi ilmiah utama terletak pada penyatuan pendekatan eksperimental, analitis, numerik, dan berbasis data untuk mendukung evaluasi integritas struktur secara lebih komprehensif dan adaptif. Penerapannya memberikan dasar ilmiah bagi inspeksi berbasis risiko, pemeliharaan prediktif, perbaikan komponen, penyempurnaan desain, dan pengembangan produk yang lebih tahan terhadap kerusakan fatik. Dengan demikian, pendekatan ini diharapkan meningkatkan keselamatan, keandalan, efisiensi, umur layan struktur, serta mendukung kemandirian teknologi nasional.

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